View Compilation Error

0_0_30313309_13036.cpp: In function 'int main()':
0_0_30313309_13036.cpp:64:5: error: 'possible' was not declared in this scope
     possible = false;
     ^
0_0_30313309_13036.cpp:68:8: error: 'possible' was not declared in this scope
   if (!possible) {
        ^