Compilare: user.cpp: In function ‘int main()’: user.cpp:68:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( ind + 1 < A.size() && A[ind+1].second < i ) ^ user.cpp:45:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( f, "%d %d", &N, &L ); ^ user.cpp:48:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( f, "%d", &Cost[i] ); ^ user.cpp:51:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( f, "%d%d", &x, &y ); ^