Compilare: main.cpp: In function 'int calc()': main.cpp:41:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(int i=1;i<t.size();i++) | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:78:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for(i=1;i<v.size();i++) | ~^~~~~~~~~