C(clang 3.9) 解法, 执行用时: 10ms, 内存消耗: 468K, 提交时间: 2019-10-05 13:47:45

#include<stdio.h>
int main()
{
	long long a,b,c,d;
	while(scanf("%lld%lld%lld%lld",&a,&b,&c,&d)!=EOF){
	long long count,sum1,sum2;
	sum1=b/2017-(a-1)/2017;
	sum2=d/2017-(c-1)/2017;
	count=sum1*(d-c+1)+sum2*(b-a+1)-sum1*sum2;
	printf("%lld\n",count);
	}
	return 0;
 } 

C++14(g++5.4) 解法, 执行用时: 14ms, 内存消耗: 808K, 提交时间: 2019-10-14 14:50:27

#include <stdio.h>
typedef long long ll;
int main()
{
	ll a, b, c, d, t1, t2;
	while(scanf("%lld %lld %lld %lld", &a, &b, &c, &d) != EOF)
	{
		t1 = b/2017 - (a-1)/2017;
		t2 = d/2017 - (c-1)/2017;
		printf("%lld\n", (b-a+1) * t2 + (d-c+1)*t1 - t1*t2);
	}
}

C++11(clang++ 3.9) 解法, 执行用时: 11ms, 内存消耗: 500K, 提交时间: 2020-02-25 21:26:50

#include<cstdio>
int main()
{
	int a,b,c,d;
	while(scanf("%d%d%d%d",&a,&b,&c,&d)!=EOF)
	{
		int x=b/2017-(a-1)/2017;
		int y=d/2017-(c-1)/2017;
		printf("%lld\n",1LL*x*(d-c+1)+1LL*y*(b-a+1)-1LL*x*y);
	}
 } 

Python3(3.5.2) 解法, 执行用时: 69ms, 内存消耗: 3680K, 提交时间: 2019-10-05 21:04:56

import sys
for line in sys.stdin:
    a,b,c,d=map(int,line.split())
    tmp1=b//2017-(a-1)//2017
    tmp2=d//2017-(c-1)//2017
    print((d-c+1)*(tmp1)+(b-a+1)*tmp2-tmp1*tmp2)