View Compilation Error

0_0_17443530_18236.cpp: In function 'int main()':
0_0_17443530_18236.cpp:91:21: error: 'ans1' was not declared in this scope
                     ans1--;
                     ^
0_0_17443530_18236.cpp:92:27: error: 'ans1' was not declared in this scope
             printf("%d\n",ans1);
                           ^