View Compilation Error

0_0_22949909_12216.cpp: In function 'int main()':
0_0_22949909_12216.cpp:21:70: error: 'o' was not declared in this scope
                 for(i0=0;i0<n;i0++)if(i>=v[i0]&&dp[i-v[i0]]+w[i0]<dp[o])dp[i]=dp[i-v[i0]]+w[i0];
                                                                      ^