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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#73810#4815. Flower's Land12345678WA 271ms1882996kbC++142.2kb2023-01-28 23:14:082023-01-28 23:14:09

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-01-28 23:14:09]
  • 评测
  • 测评结果:WA
  • 用时:271ms
  • 内存:1882996kb
  • [2023-01-28 23:14:08]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define mp make_pair
#define inf 1e9
#define pii pair <int, int>
const int mod = 1e9 + 7;
inline int read () {
	int x = 0, f = 1;
	char ch = getchar ();
	while (ch < '0' || ch > '9') f = ((ch == '-') ? -1 : f), ch = getchar ();
	while (ch >= '0' && ch <= '9') x = x * 10 + ch - '0', ch = getchar ();
	return x * f;
}
inline void write (int x) {
	if (x < 0) x = -x, putchar ('-');
	if (x >= 10) write (x / 10);
	putchar (x % 10 + '0');
}
int n, k;
int siz[40005], a[40005], f[40005][3005], g[40005][3005];
int ans[40005], tmp[3005], tmp2[3005];
vector <int> G[40005];

void dfs1(int x, int fa) {
	siz[x] = 1;
	f[x][1] = a[x];
	for(auto y : G[x]) {
		if(y == fa) continue;
		dfs1(y, x);
		memcpy(g[y], f[x], sizeof f[x]);
		memset(tmp, -0x3f, sizeof tmp);
		for(int i = 0; i <= min(k, siz[x]); i++) for(int j = 0; j <= min(k - i, siz[y]); j++) tmp[i+j] = max(tmp[i+j], f[x][i] + f[y][j]);
		memcpy(f[x], tmp, sizeof tmp);
		siz[x] += siz[y];
	}
	f[x][0] = 0;
}
void dfs2(int x, int fa) {
	int Siz = siz[x];
	g[x][k] = 0;
	for(int i = 0; i <= k; i++) ans[x] = max(ans[x], f[x][i] + g[x][i]);
	reverse(G[x].begin(), G[x].end());	
	
	memcpy(tmp2, g[x], sizeof tmp2);
	for(auto y : G[x]) {
		if(y == fa) continue;
		Siz -= siz[y];
		memset(tmp, -0x3f, sizeof tmp);
		for(int i = 0; i <= min(k, siz[y]); i++) for(int j = 0; j <= min(k - i, Siz); j++) tmp[i] = max(tmp[i], tmp2[i+j] + g[y][j]);
		memcpy(g[y], tmp, sizeof tmp);
		memset(tmp, -0x3f, sizeof tmp);
		for(int i = 0; i <= min(k, Siz); i++) for(int j = 0; j <= min(k - i, siz[y]); j++) tmp[i] = max(tmp[i], tmp2[i+j] + f[y][j]);
		memcpy(tmp2, tmp, sizeof tmp);
	}
	for(auto y : G[x]) if(y != fa) dfs2(y, x);
}
signed main () {
//	freopen (".in", "r", stdin);
//	freopen (".out", "w", stdout);
	n = read(), k = read();
	for(int i = 1; i <= n; i++) a[i] = read();
	for(int i = 1; i < n; i++) {
		int u = read(), v = read();
		G[u].push_back(v);
		G[v].push_back(u);
	}
	memset(f, -0x3f, sizeof f), memset(g, -0x3f, sizeof g), memset(ans, -0x3f, sizeof ans);
	dfs1(1, 0), dfs2(1, 0);
	for(int i = 1; i <= n; i++) write(ans[i]), putchar(' ');
	putchar('\n');
	return 0;
}
/*
*/

詳細信息

Test #1:

score: 0
Wrong Answer
time: 271ms
memory: 1882996kb

input:

5 3
6 10 4 3 4
3 4
4 2
2 5
5 1

output:

20 20 17 20 20 

result:

wrong answer 4th numbers differ - expected: '17', found: '20'