Compilare: user.cpp: In function ‘void dfsF(long int)’: user.cpp:31:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<gIn[node].size();i++){ ^ user.cpp: In function ‘void dfsB(long int)’: user.cpp:40:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<gOut[node].size();i++){ ^ user.cpp: In function ‘long int getMust(long int)’: user.cpp:47:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<Comp[act].size();i++){ ^ user.cpp: In function ‘void setCol(long int, long int)’: user.cpp:57:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<Comp[act].size();i++){ ^ user.cpp:64:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long j=0;j<gIn[newNode].size();j++){ ^ user.cpp: In function ‘int main()’: user.cpp:73:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("party.in","r",stdin); ^ user.cpp:74:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("party.out","w",stdout); ^ user.cpp:76:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&m); nn=n; n<<=1; ^ user.cpp:78:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld %ld",&x,&y,&op); ^