Compilare: main.cpp: In function 'int main()': main.cpp:69:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for(int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:74:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | while(i<v.size() && v[j]==v[i]) | ~^~~~~~~~~