View Compilation Error

0_0_31134840_15859.cpp: In function 'int main()':
0_0_31134840_15859.cpp:51:29: error: expected primary-expression before '?' token
         printf("%d\n", ans);?
                             ^
0_0_31134840_15859.cpp:52:5: error: expected primary-expression before '}' token
     }
     ^
0_0_31134840_15859.cpp:52:5: error: expected ':' before '}' token
0_0_31134840_15859.cpp:52:5: error: expected primary-expression before '}' token