Kertotaulu

import sys
import math
import itertools
from collections import defaultdict

y1, x1, y2, x2 = map(int, sys.stdin.readline().rstrip().split(" "))


def getsum(x,y):
	initsum = x*(x+1)/2
	multiplier = y*(y+1)/2
	return initsum*multiplier

print (getsum(x2,y2) + getsum(x1-1,y1-1) - getsum(x2,y1-1) - getsum(x1-1,y2)) % (10**9 + 7)

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED