diff --git a/Aufgabe 3/CMakeLists.txt b/Aufgabe 3/CMakeLists.txt
new file mode 100644
index 0000000..14bcee0
--- /dev/null
+++ b/Aufgabe 3/CMakeLists.txt	
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.31)
+project(Aufgabe_3)
+
+set(CMAKE_CXX_STANDARD 17)
+
+add_executable(Aufgabe_3 main.cpp)
diff --git a/Aufgabe 3/input.txt b/Aufgabe 3/input.txt
new file mode 100644
index 0000000..09bc832
--- /dev/null
+++ b/Aufgabe 3/input.txt	
@@ -0,0 +1,6 @@
+},;who()^>',mul(594,203)~  ~*$'*select()mul(693,99)*>&()+{%{mul(225,584)when()why()#]}&mul(287,918)<from(332,448)<^:mul(296,804)'@why()'when(),do()(+%:(who(309,257)mul(402,955):-')]</how()'{mul(462,541)who()^'{]-mul(677,297):*)-)]mul(997,185)mul(159,913);where()'+>}^mul(368,284)!>mul(943,865){who() /mul(482,561)don't()<,}>what()why();why()mul(407,849)@-mul(516,359))%:*<~&,}from()do()how()^+#^]when()%why()mul(604,810)when()from()mul(688,243)< ?[-]-who()mul(321,988)<:(%~!>[how()mul(477,536)how()!;~'mul(151,994)};mul(980,874))mul(439,349)what()]%(!%+%mul(915,912)where()~~?[mul(260,395)-mul(232,933)?why()<-&,#do()^select()'why();where()why()when()<+mul(681,169)>{#:$who()mul(667,451)mul(808,838)mul(737,381) where()how(847,856)-$):why()mul(337,590)%*)from()/what()%)]who()don't()'+[}mul(169,314)#from()/mul(936,343)why()&^mul(635,808)what()#who()$!~mul(721,645)what()!$&mul(508,537)/'>;[select()mul(570,587)when()where()/why();@/}]>don't()how(),why()mul(832,893)<mul(890,548)+'mul(887,354)&$why()select()where()$[]'do()[mul(526,27)/:^~how()mul(184,719)~?%,mul(706,502)where()from(668,399)^$mul(952,705) (,}when()<mul(525,685)}/+-what()&+^mul(461,816)} mul(15,833)!){(why():}mul(452,37){,~mul(661,869)$what()]$ [do()[@[> >]mul(862,653),>/@)[:what()?mul(579,120)#<when()mul(611,837) from()!/mul(697,303)>mul(972,506)>!$why()'-#+mul(837,98)from(156,299)why()why()select()*where() from()mul(244,480)/when()mul(89,666)-mul(18,187))^?)/mul(581,521)what(632,250)}]where()what()$mul(255,85)%mul(63,827)@*&select(),+from()mul(588,403)#[# how():^from()mul(87,601)mul(894,913))+mul(999,830)^how()&who()when()mul(63,360)~:)'mul(886,820)#+when(637,501)when(),mul(826,841)<mul(871,637),[*#-mul(876,861): @^@mul(687,724)[^-?don't()+>when()-who()mul(590,783)mul(964,976){>what()>mul(13,712):@]']from()where()who()::mulhow()+'~{;who()mul(79,750)@mul(59,645-mul(117,5)!*how()+mul(934,599)&mul(259,433)!$who()who(173,704)mul(622,219)mul(799,40))%-&/]-mul(964,29)/'who() how(),mul(640,513);where()why()-((?select()what()mul(337,730)from()when()why(){from()?mul(89,919)<~'(~@-where()mul(307,659)?select()what()select(233,108)('~%mul(257,371)what()who()}[]?where()who()mul(678,224);'-~@why()$*~from()mul(93,137))why(526,42)!'{select()what()what()when()+mul(487,383)':mul(101,242)/how():]%why()what()[:-do()-*#]^,]'@#mul(274,908)*:where(385,486)++how(658,16) ('mulwho()~#)!,what()%how()when(),mul(82,590)~when()where()mul(675,232)from()~how()~~$@*!mul(374,877)?,,]:<why()[#mul(238,568)+#select()when()(what()[mul(288,92)+&mul(935,678)(-+mul(646,366)^when()from()#&where()>;]mul(525{what()]when()what()<@'#~mul(218,321)why()[mul(7,149))]when()'mul(602,958)from()~]/>, mul(185,660)$select(),('}@mul(858,378)who()]>+mul(994,816)![^when()/why(311,783)>+mul(477,340)[what(),[who()%mul(295,109)/+~who()from()% mul(470,357))}@',*%how()how(132,604)}mul(592,563)who(464,432)+>where();who()[)where()mul(21,898)where()how()where()) how()how()-mul(853,634)%what()who()?mul(104,46),when()mul(425,445)how()select()where()mul(812,255,-'mul(326,218)+from()%^mul(326,896)-@mul(459,929)'mul-&where()where()[%}where()when()-mul(385,422);)^what()#mul(452,336)<:why()^ mul(486,292)$-select()select()mul(271,185)mul(839,107)mul(428,910)?;select()/-~)$mul(227,340)who()[[:select()how()^{where()%mul(589,539)
+^]%mul(381,668)don't();<what()/>[*)how()?mul(670,136) select()select(){>>]+mul(838,443)why()< [how()where()why()mul(122,722)where()!#?mul(500,988)~:>#mul(231,76);when()@?<what()+mul(375,131)%mul(142,344)+?;/do()!~who(){mul(798,493)^]]{mul(760,519)#;]who() {mul(731,849)$(::-don't();{[+%mul(92,201)when(463,392)mul(555,452)select()how()where(236,738)?-^-'where()mul(830,999)mul(275,204):&:')$mul(649,43)when()'];select()&don't()}!mul(61,760)+[&where()-! !)'mul(986,940) where()why()::^;+)mul(170,843)<[mul(80,442):){mul(844,466)why(599,707)*^@-@where()*don't();how();##how()->*mul(263,91){mul(681,948)[where()mul(405,666)<,mul(593,738)?:++]&from()select()~mul(124,503)what()]@-$!mul(628,744)+&@who(),>@[]mul(522,713)]#select()?why()when())$,~mul(262,399){from()/^ #mul(893,939)$^:/what()mul(190,162),@where()(@&why(768,548)~mul(486,353)>*(!why(762,229)^who()-*#mul(332,970)(;+^#select()/when()mul(340,741)mul(798,465)what()]when(415,81){@mul(878,392)-what()why(301,507))? (mul(368,530),( @!-{<mul(862,207)&}%from()mul(959,624)what()??select()mul(727,721)<mul(597,447)mul(380,969);mul(718,644)>why()mul(648]who() ^where()+>&why(){+mul(629,258) ;how()when()where()when(543,323)#>)!mul(874,15)what()when()>{;]where()mul(698,403))?!@*?where(288,133)why():mul(710,643)'^why()why()*){mul(53,898)@!(*/??{@-mul(929,921)mul(346,179));@],^[@mul(135,728)select()$@*']mul(617,892)%^who()>;*-%@mul(32,615)from()>-don't()% ~what()where()mul(857,690)[@&what()[%<&from()+mul(264,50)(''';mul(603,221)$&*,{+mul(779,669)mul(111,444)!)*(select()$@mul(340,10)(!~don't())-$where()who()~/from()$#mul(363,956),$^%mul(425,73); @)@{)@mul(927,538)<do()mul(263,610)%!$when()mul(795,738)when()&+select()[mul(193,857)what()^ ~^what()where()from(440,495)mul(180,738)don't()why(){mul(72,22);[^!&']}mul(796,290)']mul(117,806)mul(584~who()/]{%?$$['mul(902,609)@-#^'^where()-mul(482,194)mul(476what()!from()?+what(){$ ;<mul(685,45)what()?,who()'!$,why()mul(241,772);-select(167,72)select()when()?mul(447,333)when()*({:$>{ how()mul(541,949+]><)([mul(627,334)?#select()^:mul(838,568)[?where()'+>/don't()mul(225,275)how()]who()mul(674,310)mul(388,186)from()select(415,201)':#('<select()-mul(628,432)what()+:don't()mul(621,550)&,mul(936,206)!when(823,958)mul(421,850)what()how() do()$]mul(479,729){~+'!when(){who()don't()[&}+?%~</mul(135,326)%~)({mul(664,774),<^;+;}select()mul(94,609)&select()when()mul(953,750)</!+^*(mul(192,73) when();don't()*}//why()>when()who()~mul~@:;mul(55,655)how()&)+'%<>mul(862,203)what()<who(),why()?/?~mul(948,366)%what())how()? mul(248,555)>>;)&mul(196,780)>*mul(8,530)<(<#?%>!mul(963*$!+when()where(),what()~what(402,657)why()mul(282,587)mul(760who()&+-&^ #mul(163,582))where()#;(?%do(){}who()what())mul(437,16)*(when()^mul(58,667)!from();:& -]@<mul(837,19)*why(689,440),*/?)mul(202,275)do():,<$from()(from()(mul(461,612)where()what()[)]%#mul(172,865)@select()*[<{#@mul(109,57))mul(868,620)$)+!mul(403,491):?(:&)from()(mul(678,566)'mul(591,957)>^mul(853,288)()'*++%<>mul(914,566)$>when()mul(15,420)&(mul(223,567why()?where()mul(448,495)mul(139,496)]/*,<mul(10,674)what())!,,do()]>!};mul(177,399)%mul(39,651)]:$[}?do()!>why()mul(417,729)}$-from()mul(520,450)mul(265,783){^/mul(772,557){{who();from()mul(493,714)[(mul(35,779!&?(&mul(569,865)
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+!,!%*mul(247,765)'from()how()how()/mul(37,480)>who(774,403)^why()why()>{%?;mul(765,805):[%]'mul(555,863),*from(551,599){@mul(680,850)(:@,from()when()!mul$why()*@[}<how()mul(93,798)@mul(73,369)#%mul(213,737))'where():*:mulfrom()#from()&~[why()$;^mul(83,27)where()>&@what()<what()>!/mul(857,84)mul(954,860)]:)what()<}select()#>who()mul(847,874(#who()?, >$/,mul(648,867)!mul(743,614)when()where()from()),where()what()+mul(771,994);/<how()mul(490,823),(@!$}mul(67,164);-;who()mul(367,10),&from()$*mul(720,826)@{mul(788,673)]'}$when()[)-mul;<don't()@how()>&{select()mul(185,672)$?what()?-[mul(462,251)why()['!where()~)why(223,838)do()why()(?];-) mul(320,138)mul(693,135)$from();{%how(){when())mul(641,922)mul(936,690)<don't()-<'?^'&~{where(710,453)mul(82,79)~what()when()/why(581,164)+don't()who()[where()/who(){>~where()mul(405,51):mul(230,693)#^where()[,~%what()mul(847,625)>+:+mul(417,751)what()select()?#$~what()~:mul(136++(;,select()mul(84,993)(%:<{where()mul(804,257),where()(^;mul(699,405)@ {#}what(971,750)][mul(303,720)]how()who()%~who()(!*mul(159,290))*]what()when()!who()?+mul(431,69)>@why()&from()}mul(635,147)^};[mul(751,946)>}mul(750,619)mul(934,728)](where()(])!,>mul(948,935)^what()mul(635,611)mul(154,203)!]${mul(848,181)where()<:'%/why()from()^mul(58,506)mul(289,102)&}mul(219,217)why()mul(815,547)@??~<-?:mul(379,469)where()mul(892,520)@mul(684,138)who(618,612));]how()!select();(mul(620~$:don't()&mul(410,854)[[<@/select()<how()mul(818,694)>[,<mul(577,893)when()select()how())*do()[from() ,what()~mul(97,535);~mul(526,845)/[~}mul(827,275)how()mul(852,966)})]when()-'$mul(894,978)'['>mul(99,314)don't()@:+/how():mul(681,615)%@^'why()why()'*#mul(830,208)who()/<;mul(658,189what()what()mul(830,308)+%; !]!+){mul(545,809)~%when()*)what()/how()mul(113,677)-what()@*mul(881,322)-'mul(676,641)from()mul(793,567)/&+*% '[mul(707,603),what()&what()'$^how()mul(373,428)&]#*%*!when(251,472))how()mul(113,620)&[how(750,572),?+}why()'mul(439,649))-$&{!mul(567,585)how()??<mul(65,148)~%'/mul(591,992)how()mul(897,219):+<$:where()select()>mul(342,193)]mul(939,929){(how()mul(101,869)];^when()*]}^^:mul(490,241)mul(664,51)when()#  }~mul(633,172)@,:>#;>mulfrom()mul(205,672){,#>&mul(102,476)'when()mul(555,446)(:&//[where()/mul(201[when()mul(597,255)<mul(852,830)*what()[why(551,344)!'}<mul(133,373)([-*/^!mul(250,837)]-who(519,492)mul(142,16)who())&>/!-;why()mul(530,146)mul(12,488)%when()~why()?mul(397,506)^>(who(620,254)who(190,64)&]mul(244,996)*where())-*?* :-mul(89,560);#how()*%}}mul(854,585)what()~mul(670,166)*~mul(995,990)how()select()*^where()+~mul(805,731 :$mul(357,136)mul(512,13)~@&)mul(972,955)why()what()}select()how()+))mul(709,220){what()&:*^mul(430,726)!@#++-who()mul(41,47)&,}where(799,279);mul(61,691)+>mul(903,891)}!mul(826,623){>select()^what()><[mul}<^{[what()~}[select();mul(675,405)when()&where()- +?mul(485,232)(where()mul(375,359):]^{<mul(680,7)mulwhere()]mul(608,134)*''^#^mul(309,898)mul(711,574)<+*]}~do()'&-> why()mul(755,634)select()?[who()!where(698,921)*select()where()mul(111,473)when()&}mul(616/%[what()^from()how()^>mul(511,223)select()*when()/-,+what()why()don't()>why()}(+)how()where()when()mul#where()mul(310,171)when()why(){%$>)how()+mul(535,384)['how()^/mul(157,599)]mul(916,257)@when()from(){don't()when()who();; where()^what()how()~mul(668,57)
+%+mul(923,967)&(who()from(101,122)why()^mul(327($where()/;/+mul(817,835)?(mul(863,760)#mul(254,722)}+why()mul(399,61)$who()from()where()who()mul(533,810)>:+what(394,757) $mul(252,667)}what()+$mul(342,546)*)*>don't()from(), how()<]^who();mul(629,290)what()mul(234,255)!when(292,811)#from()##why()what()who()don't();mul(869,294)#^><what();~-do()select()~~from()>}mul(372,283)>%why()/<mul(423,194)%mul;[*where()+-)why()mul(573,554)$]/mul(936,543)what()why()-mul(999,520)'@;where()mul(71,216)*mul(344,530:who()*(-+*,mul(74,631)${mul(182,864):^when()~[+mul(618,708)]~mul(634,370))#:#-'/>mul&]]don't()<!mul(609,585)(?(}{<who()/(*mul(301,299):*(,@$:mul(651,306),$why():where()(#];(mul(164,471)* where()who(845,413)select()%,[+>mul(400,866)#]$/(mul(599,385)from()mul(64,766)!:++}!*]mul(256,981)^/:mul(255,258)why()what(940,608);<what()mul(371,4)mul(432,574)select(){mul(921,277)@how()from()mul(913,482),?!@who(),who()&what(23,993)>mul(769,112)*](&'/?%?mul(616,557)/mul(297,516)'why()where()mul(541,625]*@*~<when()<mul(28,891){/when()@-from()@how()mul(38how()'*;mul(909,877)mul(233,412){why()where()% ?+]'where()mul(771,811)+where()(!},?mul(826,359):;mul(604,139))?(how()why()%/;@@mul(686,118)what()who();{}-mul(484,258)when(329,846)}~why() &mul(758,786)/]where()~don't()!why()?[why()mul(909,661)mul(401,973)mul(657,33)what()~$-who()>select()!how()'mul(111,141)!)mul(829,517)#why(103,740)+/mul(147,862)&} ]?what()mul(626,774)?who()when())@(mul(442,344)&select(818,275)where()^*;&mul(935,876)when();what()$/mul(314,497)#)-how()]mul(983,427)why()^how()~~ {mul(864,428)why()<what()/mul(685,901){;who()!'from()>where()mul(218,171)select()who()why()do():~ ~;*:{*mul*select()from(984,969)mul(377,382),'how()-?!>mulwho(),who()how()#mul(479,732)$<;*from()who() mul(371,96)$;(>mul(987,681)who()from())why()do()>who()$-mul(315,10)((:from()*where()@)+mul(279,804)-where(){%when()*mul(680,426)>/@do();mul(68,45) +#(-!#mul(630,936)select()mul(370,414)'-#how(612,677)}don't()),'when()[^?mul(278,179)''^!mul(68,583);&where()[from()''mul(761,143) ~'/ [(@mul,]who()'mul(439,429)>select(508,507)[} mul(585,145){from()>*!<why()mul(661,782)mul(153,516)~$^]select()+mul(108$from()how()what()^^what()]))^mul(416,177)%;<who()>from()why(){mul(427,492)select()mul(460,379)/+where()~;>!,:^mul(8,427)mul(589,356)how(),(@do()from()+when()mul(753,641)~{ +mul(817,120)~;'?>from()%'what()mul(497,124)[)where()$ don't()+what()>+mul(344,301)mul(226,559)<where()/!%;?mul(237,518)-$]%>;)%where()(mul(153,377)'$/*,[*mul(399,320)mul(157,435),^%- >what()@!from()mul(988,920)[@how())where()}$mul(825,518);mul(277,441)select()&from()(?{mul(727,849)< how(226,741)#select()#from()[,'mul(377,916)mul(498,335)[?mul(162,204),;select()~&>^[<mul(999what()!select()[$what()*mul(697,639)what()>'what()#where()when()mul(602,837);why()who()) select()[%mul(26,319)$'&why()+mul(566,508)}?what()>how()@]why()mul(268,280) ;mul(349how()-who())}where():don't()when()<!-)&+[>)mul(261,23)where(629,189)+)~}from()^mul(805,908)from())[::&(:[mul(559,179)$how();how(424,854)?mul(497,761^?}+# mul(73,724)mul(893,324)mul(33,500)@^select()select()%mul(902,772)^do()>]&'* *,mul(531,698+)#where()who()(from()@;}mul(336,925)$what()~why()mul(672,818)who()^from():?[@what()<mul(353,321)how():$(mul(243,816):@ >,'%?+from()mul(710,158)when()?+mul(692,848)+what()/mul(771,109?}how():):from(),>$,don't()?)-when() }mul^who()mul(142,49);select()#mul(36,734)mul(387,920)'%where(821,671)}]mul(639,17)[::select()>>from()mul(335,905){:what(371,338))mul(707,318)
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diff --git a/Aufgabe 3/input_example.txt b/Aufgabe 3/input_example.txt
new file mode 100644
index 0000000..2e1a90a
--- /dev/null
+++ b/Aufgabe 3/input_example.txt	
@@ -0,0 +1 @@
+xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))
\ No newline at end of file
diff --git a/Aufgabe 3/main.cpp b/Aufgabe 3/main.cpp
new file mode 100644
index 0000000..6a42d33
--- /dev/null
+++ b/Aufgabe 3/main.cpp	
@@ -0,0 +1,67 @@
+#include <iostream>
+#include <vector>
+#include <fstream>
+#include <regex>
+
+std::string readTextFromFile(const std::string& fileName) {
+    std::vector<std::string> lines;
+    std::ifstream file(fileName);
+    if (!file) {  // Überprüft, ob die Datei geöffnet werden konnte
+        std::cerr << "Fehler: Datei konnte nicht geöffnet werden: " << fileName << std::endl;
+        return "";
+    }
+    std::string result;
+    std::string s;
+    while(getline(file, s)) {
+       result += s;
+    }
+    return result;
+}
+
+std::vector<std::string> determineValidMuls(std::string& content) {
+    std::vector<std::string> validMuls;
+
+    std::regex regex(R"(mul\(\d{1,3},\d{1,3}\))");
+    auto begin = std::sregex_iterator(content.begin(), content.end(), regex);
+    auto end = std::sregex_iterator();
+
+    for(auto it = begin; it != end; ++it) {
+        validMuls.push_back(it->str());
+    }
+    return validMuls;
+}
+
+
+int calcMultOfMultOp(const std::string& multOp) {
+    std::regex regex("\\d{1,3}");
+    auto begin = std::sregex_iterator(multOp.begin(), multOp.end(), regex);
+    auto end = std::sregex_iterator();
+
+    int multResult = 1;
+    for(auto it = begin; it != end; ++it) {
+        multResult *= std::stoi(it->str());
+    }
+    return multResult;
+}
+
+int calcMultSum(std::vector<std::string>& validMuls) {
+    int sum = 0;
+    for(const auto& mul : validMuls) {
+        sum += calcMultOfMultOp(mul);
+    }
+    return sum;
+}
+
+int main() {
+    std::string content = readTextFromFile("../input.txt");
+    std::cout << content << std::endl;
+
+    std::vector<std::string> validMuls = determineValidMuls(content);
+    for(const auto& mul : validMuls) {
+        std::cout << mul << std::endl;
+    }
+
+    int result = calcMultSum(validMuls);
+    std::cout << "The correct Mult Result is: " << result << std::endl;
+    return 0;
+}