View Compilation Error

0_0_16187925_4544.cpp: In function 'int main()':
0_0_16187925_4544.cpp:16:29: error: 'flag' was not declared in this scope
             if(ar[i]>=0 && !flag)
                             ^
0_0_16187925_4544.cpp:67:5: error: expected '}' at end of input
     }
     ^