Compilare: main.cpp: In function 'int main()': main.cpp:27:33: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 27 | if(stiva.size() == lstivaprecedent) //inseamna ca parantezare actuala e imediat dupa cea veche deci avem parantezare + parantezare | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:58:33: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 58 | if(stiva.size() == lstivaprecedent) //inseamna ca parantezare actuala e imediat dupa cea veche deci avem parantezare + parantezare | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:90:33: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 90 | if(stiva.size() == lstivaprecedent) | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:122:33: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 122 | if(stiva.size() == lstivaprecedent) | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~