Compilare: user.cpp: In function ‘char cauta(int, long long int, int, char)’: user.cpp:16:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<G[ind].size()&&G[ind][i].div!=div) ^ user.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==G[ind].size()) ^ user.cpp: In function ‘int main()’: user.cpp:74:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i1<G[i].size()||i2<m){ ^ user.cpp:75:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i1==G[i].size()||(i1<G[i].size()&&i2<m&&G[i][i1].div>=v1[i2].div)){ ^ user.cpp:75:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i1==G[i].size()||(i1<G[i].size()&&i2<m&&G[i][i1].div>=v1[i2].div)){ ^ user.cpp:43:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&t); ^ user.cpp:46:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&n); ^ user.cpp:49:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld" ,&x); ^