Compilare: main.cpp: In function 'std::vector<int> Multiply(std::vector<int>, std::vector<int>)': main.cpp:26:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | while(i < a.size() && j < b.size()){ | ~~^~~~~~~~~~ main.cpp:26:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | while(i < a.size() && j < b.size()){ | ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> Sum(std::vector<int>, std::vector<int>)': main.cpp:63:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | while(i < a.size() && j < b.size()){ | ~~^~~~~~~~~~ main.cpp:63:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | while(i < a.size() && j < b.size()){ | ~~^~~~~~~~~~ main.cpp:113:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | while(i < a.size()){ | ~~^~~~~~~~~~ main.cpp:136:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | while(j < b.size()){ | ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> expresie()': main.cpp:170:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 170 | while(i < s.size() && s[i] == '+'){ | ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> termen()': main.cpp:186:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 186 | while(i < s.size() && s[i] == '*'){ | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:264:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 264 | while(j < s.size()){ | ~~^~~~~~~~~~