Compilare: main.cpp: In function 'int main()': main.cpp:79:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int i = 0; i<v1.size(); i++) | ~^~~~~~~~~~ main.cpp:111:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 111 | for(int i = 0; i<v2.size(); i++) | ~^~~~~~~~~~ main.cpp:143:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 143 | for(int i = 0; i<v3.size(); i++) | ~^~~~~~~~~~ main.cpp:175:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 175 | for(int i = 0; i<v4.size(); i++) | ~^~~~~~~~~~