View Compilation Error

0_0_35750310_1513.cpp: In function 'int main()':
0_0_35750310_1513.cpp:55:71: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
                     if(sum[i+1][mm] > INF || dp[dp[i+1][dig][mm]] == -1)sum[i+1][mm] = -1;
                                                                       ^