Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[i].size(); j++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(izo.size()<=nrnoduri-(nrcomp-1)*2 && nrcomp>0) ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:55:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<comp_conex[i].size()-1; j++) ~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:73:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<izo.size()-1; i++) ~^~~~~~~~~~~~~ main.cpp:25:38: 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:26:40: 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:27:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:30:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^