View Compilation Error

0_0_30520855_1474.cpp: In function 'int main()':
0_0_30520855_1474.cpp:18:14: error: 'j' was not declared in this scope
         for (j = 0; j < 1010; j++)
              ^
0_0_30520855_1474.cpp:28:14: error: 'i' was not declared in this scope
         for (i = 1010 - 1; i >= 0; i--)
              ^
0_0_30520855_1474.cpp:31:16: error: 'i' was not declared in this scope
         for (; i > 0; i--)
                ^
0_0_30520855_1474.cpp:33:35: error: 'i' was not declared in this scope
         printf("%d\n", arr[n + 1][i] - 1);
                                   ^