foo.cc: In function 'int main()':
foo.cc:14:9: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   14 |         else
      |         ^~~~
foo.cc:17:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   17 |                 return 0;
      |                 ^~~~~~
foo.cc:5:17: warning: unused variable 'j' [-Wunused-variable]
    5 |         int n,i,j,leap=0;
      |                 ^