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有n件物品,每件物品只有一件,第i件物品重量为,价值为,背包容量为W。以下关于 0-1 背包的一维 DP 写法,正确的是
A for i in range(n): for j in range(W, w[i]-1, -1): dp[j] = max(dp[j], dp[j-w[i]] + v[i])
B for i in range(n): for j in range(w[i], W+1): dp[j] = max(dp[j], dp[j-w[i]] + v[i])
C for j in range(W+1): for i in range(n): dp[j] = max(dp[j], dp[j-w[i]] + v[i])
D for i in range(n): for j in range(W+1): dp[j] = dp[j-w[i]] + v[i]
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