Compilare: main.cpp: In function 'void solve(int, int)': main.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for( i = 0; i < edges[vf].size(); i++ ) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp:23:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for( i = 0; i < edges[vf].size(); i++ ) { | ~~^~~~~~~~~~~~~~~~~~