Compilare: user.cpp: In function ‘int main()’: user.cpp:50:28: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘int’ [-Wformat=] fprintf(fout, "%lld", ans); ^ user.cpp:13:19: warning: unused variable ‘l’ [-Wunused-variable] int i, j, maxs, l, st, dr, ans, mid; ^ user.cpp:15:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%lld%d", &n, &m, &c, &cate); ^ user.cpp:16:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d", &x, &y, &z, &w, &u); ^ user.cpp:18:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[1][j]); ^ user.cpp:20:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i][1]); ^