P4995 跳跳！（贪心）

2401_827364562024-04-01 22:02

多么痛的领悟！大数据要开long long！！！简单longlong就AC！

代码1：

cpp 复制代码

#include<algorithm>
#include<iostream>
#include<cstring>
#include<queue>
#include<cmath>
using namespace std;

int n;
struct node{
	int id;
	int h;
};
node tone[310];

bool cmp(node a,node b)
{
	return a.h < b.h;
}
//消耗体力算法
int  consume(int hi,int hj){	
	return (hj - hi)*(hj - hi);		
}

int main()
{
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%d",&tone[i].h);
	}
	
	sort(tone+1,tone+n+1,cmp);
	
	int ans = tone[n].h * tone[n].h;
	
	for(int i=1;i<=n/2;i++){
		int h1 = tone[i].h;
		int h2 = tone[n+1-i].h;
		int h3 = tone[n-i].h;
		int phy1;
		int phy2;
		if(n%2==0 && i + 1 == n + 1 - i){
			phy1=0;
			phy2 = consume(h1,h2);
		}
		else{
			phy1 = consume(h1,h2);
			phy2 = consume(h1,h3);
		}
		
		ans+=phy1;
		ans+=phy2;
		
	}
	
	printf("%d",ans);
	return 0;
}

结果：50分

代码2：

cpp 复制代码

#include<algorithm>
#include<iostream>
#include<cstring>
#include<queue>
#include<cmath>
using namespace std;
typedef long long LL;

int n;
struct node{
	int id;
	int h;
};
node tone[310];

bool cmp(node a,node b)
{
	return a.h < b.h;
}
//消耗体力算法
LL consume(int hi,int hj){	
	return (hj - hi)*(hj - hi);		
}

int main()
{
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%d",&tone[i].h);
	}
	
	sort(tone+1,tone+n+1,cmp);
	
	LL ans = tone[n].h * tone[n].h;
	
	for(int i=1;i<=n/2;i++){
		int h1 = tone[i].h;
		int h2 = tone[n+1-i].h;
		int h3 = tone[n-i].h;
		LL phy1;
		LL phy2;
		if(n%2==0 && i + 1 == n + 1 - i){
			phy1=0;
			phy2 = consume(h1,h2);
		}
		else{
			phy1 = consume(h1,h2);
			phy2 = consume(h1,h3);
		}
		
		ans+=phy1;
		ans+=phy2;
		
	}
	
	printf("%lld",ans);
	return 0;
}