/in/foo.cc: In function 'int main()':
/in/foo.cc:28:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    for(int j=1;j<=n;j++) printf("%d ",f[i][j]);puts("");
    ^~~
/in/foo.cc:28:48: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    for(int j=1;j<=n;j++) printf("%d ",f[i][j]);puts("");
                                                ^~~~