AcWing 1371.货币系统
作者:互联网
题解:货币系统
题目描述
题目链接:
https://www.acwing.com/problem/content/description/1373/
思路分析
动态规划
代码描述
二维空间写法
#include<iostream>
#include<cstring>
#include<algorithm>
using namespace std;
typedef long long LL;
const int N=30,M=10010;
int n,m;
LL f[N][M];
int main()
{
cin>>n>>m;
f[0][0]=1;
for(int i=1;i<=n;i++)
{
int v;
cin>>v;
for(int j=0;j<=m;j++)
{
f[i][j]=f[i-1][j];
if(j>=v)
{
f[i][j]+=f[i][j-v];
}
}
}
cout<<f[n][m]<<endl;
return 0;
}
优化成一维空间
#include <iostream>
#include <cstring>
#include <algorithm>
using namespace std;
typedef long long LL;
const int N = 30, M = 10010;
int n, m;
LL f[M];
int main()
{
cin >> n >> m;
f[0] = 1;
for (int i = 1; i <= n; i ++ )
{
int v;
cin >> v;
for (int j = v; j <= m; j ++ )
f[j] = f[j] + f[j - v];
}
cout << f[m] << endl;
return 0;
}
标签:int,LL,cin,long,1371,货币,描述,include,AcWing 来源: https://blog.csdn.net/qq_45657288/article/details/113073711