a=int(input()) if (a>=90) : print(A) elif (a>=80) : print(B) elif (a>=70) : print(C) elif (a>=60) : print(D) else : print(F)

a=int(input()) b=int(input()) if a>0 and b>0 : print(1) if a<0 and b>0 : print(2) if a<0 and b<0 : print(3) if a>0 and b<0 : print(4)

n=int(input()) if (a%4==0 && a%100!=0 && a%400==0) : print(1) else : print(0)

a=int(input()) b=int(input()) c=int(input())

if (a==b and a==c) : sum=10000*+a1000 elif (a==b and a!=c) or (a==c and a!=b) : sum=1000+a100 elif (b==c and b!=a) : sum=1000+b100 elif a!=c and a!=b and b!=c : if (a>=c and a>=b) : max=a if (b>=a and b>=c) : max=b if (c>=a and c>=b) : max=c sum=max100

print(sum)

h = int(input()) m = int(input()) add = int(input())

M= h * 60 + m + add h = (M // 60) % 24 M = M % 60

print(h, M)

h=int(input()) m=int(input()) a=45

M=(h*60+m-a) h=(M//60)%24 h%=24 M%=60

print(h,M)