View Compilation Error

0_0_26249988_2109.cpp: In function 'int main()':
0_0_26249988_2109.cpp:6:26: error: 'scanf' was not declared in this scope
     int T,n;scanf("%d",&T);
                          ^
0_0_26249988_2109.cpp:14:107: error: 'max' was not declared in this scope
             if(i+j+1<=n+1) dp[t][i%N+1][j]=max(dp[t][i%N+1][j],sum[i+j]-sum[i-1]-dp[t^1][(i+j+1)%N+1][j+1]);
                                                                                                           ^
0_0_26249988_2109.cpp:16:34: error: 'printf' was not declared in this scope
         printf("%d\n",dp[0][2][1]);
                                  ^