View Compilation Error

0_0_32802042_10430.cpp: In function 'int main()':
0_0_32802042_10430.cpp:43:50: error: 't' was not declared in this scope
   if(abs(sx-ex)+abs(sy-ey) > times || n*m-wall < t) {cout << "NO" << endl; continue;}
                                                  ^