View Compilation Error

0_0_25253268_30134.cpp: In function 'void dfs(int, int)':
0_0_25253268_30134.cpp:33:4: error: 'dp' was not declared in this scope
    dp[y][j]=dp[x][j];
    ^
0_0_25253268_30134.cpp:34:8: error: too few arguments to function 'void dfs(int, int)'
   dfs(y);
        ^
0_0_25253268_30134.cpp:24:6: note: declared here
 void dfs(int x,int last){
      ^
0_0_25253268_30134.cpp:36:4: error: 'dp' was not declared in this scope
    dp[x][j]=max(dp[x][j],dp[y][j-c[y]]+v[y]);
    ^