foo.cc: In function 'bool leap(int)':
foo.cc:5:12: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    5 |  if(x%4==0 && x%100!=0 || x%400==0) return true;
      |     ~~~~~~~^~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |  scanf("%d%d", &y, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~

正在同步测试数据，请稍后
Found 20 testcases.
[Hydro](https://hydro.ac)提供评测服务