Compilare: main.cpp: In function 'void dfs(int)': main.cpp:10:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<adc[nod].size(); ++i) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adc[nod].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:47:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adc[nod].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:19:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pandemie.in", "r", stdin); ^ main.cpp:20:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pandemie.out", "w", stdout); ^ main.cpp:22:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:26:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ main.cpp:34:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&q); ^ main.cpp:38:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&op,&nod); ^