/in/foo.cc: In function 'int main()':
/in/foo.cc:12:7: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
       for(int j=0;j<len;j++) 
       ^~~
/in/foo.cc:19:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
    A[i][k++]=x;
    ^