View Compilation Error

0_0_37310961_24488.cpp: In function 'int main()':
0_0_37310961_24488.cpp:68:7: error: 'flag1' was not declared in this scope
       flag1=max(flag1,R[i].c);
       ^
0_0_37310961_24488.cpp:69:7: error: 'flag2' was not declared in this scope
       flag2=min(flag2,R[i].c);
       ^