Compilare: main.cpp: In function 'void solve()': main.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (i = 0; i < v.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'void output()': main.cpp:70:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for (i = 0; i < v.size(); i++) | ~~^~~~~~~~~~