View Compilation Error

0_0_38535084_12080.cpp: In function 'int main()':
0_0_38535084_12080.cpp:55:6: error: 'ans' was not declared in this scope
      ans++;
      ^
0_0_38535084_12080.cpp:63:6: error: 'ans' was not declared in this scope
   if(ans==0){
      ^
0_0_38535084_12080.cpp:66:6: error: 'ans' was not declared in this scope
   if(ans==1){
      ^
0_0_38535084_12080.cpp:69:6: error: 'ans' was not declared in this scope
   if(ans==2){
      ^