View Compilation Error

0_0_24525206_1438.cpp: In function 'int main()':
0_0_24525206_1438.cpp:72:10: error: 'ans' was not declared in this scope
          ans++;
          ^
0_0_24525206_1438.cpp:74:12: error: 'ans' was not declared in this scope
        if (ans)
            ^