View Compilation Error

0_0_18085844_5447.cpp: In function 'bool check(int)':
0_0_18085844_5447.cpp:79:13: error: 'dpi' was not declared in this scope
             dpi[][j] = 0;
             ^
0_0_18085844_5447.cpp:79:17: error: expected primary-expression before ']' token
             dpi[][j] = 0;
                 ^