View Compilation Error

0_0_29128162_29904.cpp:15:12: error: expected initializer before '?' token
 ll dp[N][N]?????;
            ^
0_0_29128162_29904.cpp: In function 'int main()':
0_0_29128162_29904.cpp:28:29: error: 'dp' was not declared in this scope
     for(int i=1;i<=5000;i++)dp[i][1]=i;
                             ^
0_0_29128162_29904.cpp:32:13: error: 'dp' was not declared in this scope
             dp[j][i]=(dp[j-1][i]+sum)%mod;
             ^
0_0_29128162_29904.cpp:39:18: error: 'dp' was not declared in this scope
             ans+=dp[n][i]*dp[m][i]%mod*pow(i,mod-2)%mod;
                  ^