Compilare: main.cpp: In function 'int main()': main.cpp:85:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int j = 0; j < v[i].size(); j++) | ~~^~~~~~~~~~~~~ main.cpp:93:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | for(int x = 0; x < v[i - k].size(); x++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:104:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 104 | for(int j = 0; j < v[i].size(); j++) | ~~^~~~~~~~~~~~~