View Compilation Error

0_0_22909020_15804.cpp: In function 'int main()':
0_0_22909020_15804.cpp:50:20: error: 'dp2' was not declared in this scope
                    dp2[k]=min(dp2[k],dp2[k-len*x[i]]+len*y[i]);
                    ^
0_0_22909020_15804.cpp:56:33: error: 'dp2' was not declared in this scope
             mincost=min(mincost,dp2[i]);
                                 ^