Compilare: main.cpp: In function 'void df(int)': main.cpp:11:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void dft(int)': main.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gt[x].size();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:34:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=n;i>=1;i--) ^~~ main.cpp:36:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' printf("%d\n",nc); ^~~~~~ main.cpp:24:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ctc.in","r",stdin); ^ main.cpp:25:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ctc.out","w",stdout); ^ main.cpp:26:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ main.cpp:28:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^