View Compilation Error

0_0_13919000_5646.c: In function 'main':
0_0_13919000_5646.c:23:1: error: expected expression before '/' token
 // freopen("1241.txt","r",stdin);
 ^
0_0_13919000_5646.c:27:4: error: expected expression before '/' token
    //for(j=0;j<n;j++){
    ^