foo.cc: In function 'int main()':
foo.cc:12:10: warning: unused variable 'j' [-Wunused-variable]
   12 |  int n,i,j,k,x1,x2,y1,y2,a,b;
      |          ^
foo.cc:12:12: warning: unused variable 'k' [-Wunused-variable]
   12 |  int n,i,j,k,x1,x2,y1,y2,a,b;
      |            ^

正在同步测试数据，请稍后
Found 10 testcases.
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