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你们写代码都不写注释,这不是个好习惯,贴我的#include<iostream> #include<algorithm> using namespace std; int N, M; //N个物品,包的体积为M int w[3505], d[3505]; //体积,价值 int result[13005]; //result[i]表示从从 某些物品 中取出体积为i的最大价值 int main() { scanf("%d%d", &N, &M); // cin >> N >> M; for (int i = 1; i <= N; ++i) { scanf("%d%d", &w[i], &d[i]); // cin >> w[i] >> d[i]; } result[0] = 0; //取体积为0,价值为0 for (int j = 1; j <= M; ++j) //result数组初始化为从第1个物品中取 体积为j 的最大价值,此后不断更新 if (w[1] > j) result[j] = 0; else result[j] = d[1]; for (int i = 2; i < N; ++i) //从前i个物品取体积为j for (int j = M; j >= 1; --j) { if (j >= w[i]) //第i个物品可以取的话,尝试更新 result[j] = max(result[j], result[j - w[i]] + d[i]); } if (M > w[N]) result[M] = max(result[M], result[M - w[N]] + d[N]); // cout << result[M] << endl; printf("%d\n", result[M]); return 0; } Followed by:
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