Compilare: user.cpp: In function ‘int bs(int)’: user.cpp:35:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r+pas<cost.size() && cost[r+pas].c<x) ^ user.cpp: In function ‘int main()’: user.cpp:48:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&n); ^ user.cpp:51:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&aux.n); ^ user.cpp:65:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&q); ^ user.cpp:68:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d",&p,&c); ^