Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:13:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for (int i=0;i<v[x].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int i=0;i<gr[x].size();i++) | ~^~~~~~~~~~~~~ main.cpp: In function 'bool cupleaza(int)': main.cpp:41:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i=0;i<cuplaj[x].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp:50:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int i=0;i<cuplaj[x].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve(int, int)': main.cpp:64:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for (int i=0;i<v[x].size();i++) | ~^~~~~~~~~~~~ main.cpp:93:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | for (k=0;k<v[x].size();k++) | ~^~~~~~~~~~~~ main.cpp:99:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for (t=0;t<gr[j].size();t++) | ~^~~~~~~~~~~~~ main.cpp:121:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for (k=0;k<v[x].size();k++) | ~^~~~~~~~~~~~ main.cpp:144:21: warning: unused variable 'sum' [-Wunused-variable] 144 | int sum=0; | ^~~