Compilare: main.cpp: In function 'void solve(int, int)': main.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:29:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int j=i+1;j<v.size();j++) | ~^~~~~~~~~