Compilare: user.cpp: In function ‘int disjoint(int, int)’: user.cpp:33:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[yy].size(); i++) ^ user.cpp:41:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[xx].size(); i++) ^ user.cpp: In function ‘void rezolva()’: user.cpp:77:20: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (xx!=yy) ^ user.cpp:96:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<v[i].size(); j++) ^ user.cpp:56:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&C); ^ user.cpp:63:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp: In function ‘int main()’: user.cpp:109:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piese3.in","r",stdin); ^ user.cpp:110:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piese3.out","w",stdout); ^ user.cpp:111:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^