foo.c: In function 'result':
foo.c:25:21: warning: variable 'o' set but not used [-Wunused-but-set-variable]
  int i, j, q, p, k, o;
                     ^
foo.c:25:18: warning: variable 'k' set but not used [-Wunused-but-set-variable]
  int i, j, q, p, k, o;
                  ^
foo.c: In function 'main':
foo.c:60:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ^
foo.c:62:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &a[i].xin, &a[i].ban);
   ^

自豪的采用 HydroJudger 进行评测(github.com/hydro-dev/HydroJudger)

{"receive":"2020-03-30T13:05:47.039Z","handle":"2020-03-30T13:05:47.039Z","cache_start":"2020-03-30T13:05:47.064Z","read_cases":"2020-03-30T13:05:47.184Z","judge":"2020-03-30T13:05:47.184Z","done":"2020-03-30T13:05:57.470Z"}