二维朴素版
#include <iostream>
#include <algorithm>
using namespace std;
const int N = 1010;
int n, m;
int v[N], w[N];
int f[N][N];
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
for (int i = 1; i <= n; i++)
cin >> v[i] >> w[i];
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
if (v[i] > j)
f[i][j] = f[i - 1][j];
else
f[i][j] = max(f[i - 1][j], f[i - 1][j - v[i]] + w[i]);
}
}
cout << f[n][m] << endl;
return 0;
}
一维优化版
#include <iostream>
#include <algorithm>
using namespace std;
const int N = 1010;
int n, m;
int v[N], w[N];
int f[N];
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
for (int i = 1; i <= n; i++)
cin >> v[i] >> w[i];
for (int i = 1; i <= n; i++)
for (int j = m; j >= v[i]; j--)
f[j] = max(f[j], f[j - v[i]] + w[i]);
cout << f[m] << endl;
return 0;
}