foo.cc: In function ‘int main()’:
foo.cc:27:17: warning: ‘j’ may be used uninitialized [-Wmaybe-uninitialized]
   27 |         cout<<i+j;
      |                 ^
foo.cc:17:17: note: ‘j’ was declared here
   17 |         int n,i,j;
      |                 ^

正在同步测试数据，请稍后