View Compilation Error

0_0_25841451_28570.cpp: In function 'int main()':
0_0_25841451_28570.cpp:26:24: error: 'ans' was not declared in this scope
         printf("%d\n", ans);
                        ^
0_0_25841451_28570.cpp: At global scope:
0_0_25841451_28570.cpp:28:1: error: expected declaration before '}' token
 }
 ^