foo.cc: In function ‘int main()’:
foo.cc:6:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
    6 |     for(int i=1;i<=n;i++)
      |     ^~~
foo.cc:7:20: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
    7 |     s1=s1+s,s=s+s1;cout<<s;
      |                    ^~~~