View Compilation Error

0_0_28587404_13126.cpp: In function 'int main()':
0_0_28587404_13126.cpp:34:29: error: 'v' was not declared in this scope
             if(a[j].need <= v && a[j].spare <= v)
                             ^
0_0_28587404_13126.cpp:40:17: error: 'f' was not declared in this scope
                 f = 0;
                 ^
0_0_28587404_13126.cpp:44:12: error: 'f' was not declared in this scope
         if(f == 1)
            ^