CodeForces 606A-A. Magic Spheres【模拟】

我不是女神ヾ 2022-08-19 11:28 21阅读 0赞

A. Magic Spheres

time limit per test

2 seconds

memory limit per test

256 megabytes

input

standard input

output

standard output

Carl is a beginner magician. He has *a* blue, *b* violet and *c* orange magic spheres. In one move he can transform two spheres of the same color into one sphere of any other color. To make a spell that has never been seen before, he needs at least *x* blue, *y* violet and *z* orange spheres. Can he get them (possible, in multiple actions)?

Input

The first line of the input contains three integers *a*, *b* and *c* (0 ≤ *a*, *b*, *c* ≤ 1 000 000) — the number of blue, violet and orange spheres that are in the magician's disposal.

The second line of the input contains three integers, *x*, *y* and *z* (0 ≤ *x*, *y*, *z* ≤ 1 000 000) — the number of blue, violet and orange spheres that he needs to get.

Output

If the wizard is able to obtain the required numbers of spheres, print "Yes". Otherwise, print "No".

Sample test(s)

Input

4 4 0
    2 1 2

Output

Yes

Input

5 6 1
    2 7 2

Output

Input

3 3 3
    2 2 2

Output

Yes

题目大意：

题目大意就是上面一行是现有的球下面一行是需要的球，魔法师可以将两个相同颜色的球变成另外颜色的球，问是否可以做到。

#include<stdio.h>
    #include<cmath>
    #include<string.h>
    int main()
    {
    	int a,b,c,x,y,z;
    	while(scanf("%d%d%d",&a,&b,&c)!=EOF)
    	{
    		scanf("%d%d%d",&x,&y,&z);
    		int qx=0,qy=0,qz=0;
    		qx=a-x;
    		qy=b-y;
    		qz=c-z;
    		int lx=0,ly=0,lz=0;
    		if(qx>0)
    		lx=qx/2;
    		if(qy>0)
    		ly=qy/2;
    		if(qz>0)
    		lz=qz/2;
    		lx+=ly+lz;
    		int zz=0;
    		if(qx<0)
    		zz+=qx;
    		if(qy<0)
    		zz+=qy;
    		if(qz<0)
    		zz+=qz;
    		zz*=-1;
    		if(lx>=zz)
    		printf("Yes\n");
    		else
    		printf("No\n");
    	}
    	return 0;
    }