Compilare: main.cpp: In function 'void dfs(int)': main.cpp:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < G[u].size() ; j ++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:71:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1 ; i < comp.size() ; i ++) ~~^~~~~~~~~~~~~ main.cpp:99:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < C[i].size() ; j ++) ~~^~~~~~~~~~~~~ main.cpp:102:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0 ; k < T[i].size() ; k ++) ~~^~~~~~~~~~~~~ main.cpp:103:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(viz[T[i][k]] < (f[i] - 1) / T[i].size() + 1) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:105:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(l = 0 ; l < T[y].size() ; l ++) ~~^~~~~~~~~~~~~ main.cpp:106:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(viz[T[y][l]] < (f[y] - 1) / T[y].size() + 1) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:46:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("conexidad.in" , "r" , stdin); ^ main.cpp:47:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("conexidad.out" , "w" , stdout); ^ main.cpp:49:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d" , &n , &m); ^ main.cpp:52:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d" , &x , &y); ^