Compilare: user.cpp: In function ‘int bkt(int)’: user.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[nod].size();j++){ ~^~~~~~~~~~~~~~ user.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[nod].size();j++) fr[v[nod][j]][i]--; ~^~~~~~~~~~~~~~ user.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[nod].size();j++) fr[v[nod][j]][i]++; ~^~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:40:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:42:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&m); ^ user.cpp:44:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^ user.cpp:48:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^