View Compilation Error

0_0_38349466_19686.cpp: In function 'int main()':
0_0_38349466_19686.cpp:49:20: error: 'ans' was not declared in this scope
   printf("%lld\n", ans);
                    ^
0_0_38349466_19686.cpp: At global scope:
0_0_38349466_19686.cpp:51:1: error: expected declaration before '}' token
 }
 ^