View Compilation Error

0_0_17326199_15781.cpp: In function 'int main()':
0_0_17326199_15781.cpp:22:17: error: 'dp' was not declared in this scope
                 dp[i][j]=0;
                 ^
0_0_17326199_15781.cpp:27:13: error: 'dp' was not declared in this scope
             dp[i][a[i]]=1;
             ^
0_0_17326199_15781.cpp:31:21: error: 'dp' was not declared in this scope
                  if(dp[i-1][j])
                     ^
0_0_17326199_15781.cpp:38:26: error: 'dp' was not declared in this scope
         printf("%lld\n",(dp[n][0]+1)%mod);
                          ^