Compilare: user.cpp: In function ‘int timp(int)’: user.cpp:32:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[e.first].size();i++){ ~^~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:71:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&k); ^ user.cpp:73:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x[i]); ^ user.cpp:74:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&m); ^ user.cpp:76:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&xx,&y,&t,&w); ^