View Compilation Error

0_0_35550018_18615.cpp: In function 'int main()':
0_0_35550018_18615.cpp:99:30: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
                 if(dp[i] == -1)
                              ^
0_0_35550018_18615.cpp:101:29: error: 'dfs' was not declared in this scope
                     dfs(i,-1);
                             ^