View Compilation Error

0_0_23589720_13435.cpp: In function 'int main()':
0_0_23589720_13435.cpp:25:13: error: 'ans' was not declared in this scope
             ans = max(dp[i], ans);
             ^
0_0_23589720_13435.cpp:27:17: error: 'ans' was not declared in this scope
         cout << ans << endl;
                 ^