View Compilation Error

0_0_18092048_1497.cpp: In function 'void dfs(int, int)':
0_0_18092048_1497.cpp:39:31: error: 'i' was not declared in this scope
     dp[u][0] = dp[u][1] = dp2[i][0]=dp2[i][1]= 0;
                               ^