View Compilation Error

0_0_21151237_7615.cpp: In function 'int main()':
0_0_21151237_7615.cpp:65:14: error: 'wall' was not declared in this scope
   if ((n*m - wall - count) < T)
              ^
0_0_21151237_7615.cpp:65:21: error: 'count' was not declared in this scope
   if ((n*m - wall - count) < T)
                     ^
0_0_21151237_7615.cpp:78:16: error: 'syetem' was not declared in this scope
  syetem("pause");
                ^