/in/foo.cc: In function 'int main()':
/in/foo.cc:98:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &n, &m, &L);
                             ^
/in/foo.cc:103:88: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for(int i = 1; i <= L; i++) scanf("%d%d", &a[i].x, &a[i].y), bo[a[i].x][a[i].y] = cnt;
                                                                                        ^
/in/foo.cc:104:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &K);
                  ^
/in/foo.cc:107:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d", &x, &y);
                         ^
/in/foo.cc:117:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &n, &m, &L);
                              ^