Compilare: main.cpp: In function 'int revs(int, int)': main.cpp:79:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int i = 0;i < c.size();i++) nrr = nrr * 10 + c[i]; | ~~^~~~~~~~~~ main.cpp: In function 'int STOI(std::string)': main.cpp:88:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 88 | for(int i = 0;i < s.size();i++) ans = ans * 10 + (s[i] - '0'); | ~~^~~~~~~~~~ main.cpp: In function 'int eval(std::string)': main.cpp:166:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 166 | for(int i = 0;i < ops.size();i++) | ~~^~~~~~~~~~~~ main.cpp:176:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 176 | while(it < ops[i].size()) | ~~~^~~~~~~~~~~~~~~ main.cpp:186:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 186 | for(int i = 0;i < ops.size();i++) | ~~^~~~~~~~~~~~ main.cpp:192:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 192 | for(int j = 0;j < ops[i].size();j++) | ~~^~~~~~~~~~~~~~~ main.cpp:217:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 217 | for(int i = 0;i < res.size() - 1;i++) | ~~^~~~~~~~~~~~~~~~ main.cpp:227:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 227 | for(int i = 0;i < res.size();i++) | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:248:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 248 | for(int i = 0;i < s.size();i++) | ~~^~~~~~~~~~ main.cpp:240:13: warning: unused variable 'n' [-Wunused-variable] 240 | int n = s.size(); | ^ main.cpp:246:13: warning: unused variable 'ans' [-Wunused-variable] 246 | int ans = 0; | ^~~ main.cpp: In function 'bool semn(char)': main.cpp:51:1: warning: control reaches end of non-void function [-Wreturn-type] 51 | } | ^