codeforces 1003A. Polycarp's Pockets,C. Intense Heat(暴力)

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A. Polycarp's Pockets

题目链接:codeforces 1003A

题意:

     给n个数,要求相同的数不能放在一个口袋,问最少需要多少个口袋

题解:

    求出最多的相同数的个数,就是答案

#include<cstdio>
#include<cstring>
int main(){
	int n;
	int a[105];
	memset(a,0,sizeof(a));
	scanf("%d",&n);
	for(int i = 1;i <= n;i++){
		int x;
		scanf("%d",&x);
		a[x]++;
	}
	int max = -100;
	for(int i = 1;i <= 100;i++){
		if(max < a[i]){
			max = a[i];
		}
	}
	printf("%d\n",max);
	return 0;
}

 

C. Intense Heat(暴力)

题目链接:codeforces 1003C

题意:

   给出 n 个值,求 大于等于 k 个数的最大平均值

题解:

   先求前缀和,然后暴力

AC代码

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
	ll a[5005], u;
	int n, k;
	cin >> n >> k;
	memset(a, 0, sizeof(a));
	for(int i = 1; i <= n; i++){
		cin >> u;
		a[i] = a[i-1] + u;
	}
	a[0] = 0;
	double maxx = 0.0;
	for(int i = 1; i <= n; i++){
		for(int j = i+k-1; j <= n; j++){
			double k = (double)(a[j] - a[i-1]);
			double p = (double) (j - i + 1);
			if(k / p * 1.0 > maxx){
				maxx = k / p * 1.0;
			}
		}
	}
	printf("%.12lf\n", maxx);
	return 0;
}

 

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