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<sal[x].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i=0;i<ceau[x].size();i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'bool cupleaza(int)': main.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i=0;i<cuplaj[x].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp:52:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i=0;i<cuplaj[x].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve(int, int)': main.cpp:66:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int i=0;i<v[x].size();i++) | ~^~~~~~~~~~~~ main.cpp:91:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for (t=0;t<gr[j].size();t++) | ~^~~~~~~~~~~~~ main.cpp:95:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | for (k=0;k<v[x].size();k++) | ~^~~~~~~~~~~~ main.cpp:97:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for (t=0;t<gr[j].size();t++) | ~^~~~~~~~~~~~~ main.cpp:111:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 111 | for (k=0;k<v[x].size();k++) | ~^~~~~~~~~~~~ main.cpp:130:21: warning: unused variable 'sum' [-Wunused-variable] 130 | int sum=0; | ^~~