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5. 多重背包问题 II
https://www.acwing.com/problem/content/submission/code_detail/13024172/
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AcWing/5/5.cpp
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36
AcWing/5/5.cpp
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#include <iostream>
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#include <vector>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const int M = 2005;
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int n, m, f[M];
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std::vector<std::pair<int, int>> a;
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int main() {
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std::ios::sync_with_stdio(false);
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cin >> n >> m;
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for (int i = 1, v, w, s; i <= n; i++) {
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cin >> v >> w >> s;
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for (int k = 1; k <= s; k <<= 1) {
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s -= k;
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a.push_back(std::make_pair(k * v, k * w));
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}
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if (s > 0) a.push_back(std::make_pair(s * v, s * w));
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}
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for (int i = 0; i < a.size(); i++) {
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for (int j = m; j >= a[i].first; j--) {
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f[j] = std::max(f[j], f[j - a[i].first] + a[i].second);
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}
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}
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cout << f[m] << endl;
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return 0;
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}
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