Compilare: main.cpp: In function 'void dfs(int)': main.cpp:134:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 134 | for( i = 0; i < metrouri[x].size(); i++ ){ | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:139:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 139 | for( i = 0; i < muchii[x].size(); i++ ){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp:155:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 155 | for( i = 0; i < muchii[x].size(); i++ ){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp:165:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 165 | for( i = 0; i < to_delete.size(); i++ ){ | ~~^~~~~~~~~~~~~~~~~~