View Compilation Error

0_0_21487574_32714.cpp: In function 'int bfs(int, int)':
0_0_21487574_32714.cpp:31:24: error: invalid types 'int[int]' for array subscript
    pre.x = next.x + d[i][0];
                        ^
0_0_21487574_32714.cpp:32:24: error: invalid types 'int[int]' for array subscript
    pre.y = next.y + d[i][1];
                        ^