01背包 完全背包 多重背包模板

const int maxn = 100000 + 10;int N, V, amount[maxn], capacity[maxn], weight[maxn];int dp[maxn];void bag01(int cost, int weight) { for (int i = V; i >= cost; i--) { dp[i] = max(dp[i], dp[i - cost] + weight); }}void completebag(int cost, int weight) { for (int i = cost; i <= V; i++) { dp[i] = max(dp[i], dp[i - cost] + weight); }}void multiplybag(int cost, int weight, int amount) { if (cost * amount >= V) completebag(cost, weight); else { int k = 1; while (k < amount) { bag01(k * cost, k * weight); amount -= k; k += k; } bag01(amount * cost, amount * weight); }}

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