Compilare: user.cpp: In function ‘int ctb(int)’: user.cpp:25:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;p<L[dr].size();p<<=1); ^ user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (st+p<L[dr].size() && L[dr][st+p].first<x) ^ user.cpp: In function ‘int main()’: user.cpp:64:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (xx<=L[dr].size()) ^ user.cpp:66:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (yy<L[dr].size() && L[dr][yy].first==aux+(dr-i)) ^ user.cpp:68:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (yy<L[dr].size()) ^ user.cpp:75:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int it =0;it<L[dr].size();it++) ^ user.cpp:38:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:40:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&P[i].first,&P[i].second); ^