Kertotaulu

#include <iostream>
#define m 1000000007
using namespace std;

int main(int argc, char** argv) {
    long long x1, x2, y1, y2;
    cin >> y1 >> x1 >> y2 >> x2;
    long long a = ((((x1 + x2)%m)*((x2 - x1 + 1)%m))/2)%m;
    long long b = ((((y1 + y2)%m)*((y2 - y1 + 1)%m))/2)%m;
    cout << (a*b)%m;
    return 0;
}

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: WRONG ANSWER

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER