View Compilation Error

0_0_35716656_21155.cpp: In function 'int main()':
0_0_35716656_21155.cpp:39:21: error: 'ans' was not declared in this scope
                     ans=ans*sw(j,s)%mod;
                     ^
0_0_35716656_21155.cpp:47:13: error: 'ans' was not declared in this scope
             ans+=dp[i];
             ^