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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
#820494#9713. Kill the treeLoxilanteWA 152ms34108kbC++201.3kb2024-12-18 21:37:012024-12-18 21:37:03

Judging History

你现在查看的是最新测评结果

  • [2024-12-18 21:37:03]
  • 评测
  • 测评结果:WA
  • 用时:152ms
  • 内存:34108kb
  • [2024-12-18 21:37:01]
  • 提交

answer

#include <bits/stdc++.h>
#define rep(i, l, r) for(int i = l; i < r; i++)
#define hrp(i, l, r) for(int i = l; i <= r; i++)
#define rev(i, r, l) for(int i = r; i >= l; i--)
#define int ll
using namespace std;
typedef long long ll;
template<typename tn = int> tn next(void) { tn k; cin>>k; return k; }
#ifndef LOCAL
#define D(...) 0
#define I(...) 0
#endif
const int U = 7e5;
int cen[U], mxs[U], siz[U], fa[U];
vector<int> edge[U];
bool chkmin(int&a, int b) { return a > b ? a = b, 1 : 0; }
void dfs(int e, int f)
{
    siz[e] = 1; cen[e] = e; fa[e] = f;

    for(auto y: edge[e]) if (y != f) dfs(y, e), mxs[e] = max(mxs[e], siz[y]), siz[e] += siz[y];

    for(auto y: edge[e]) if (y != f)
    {
        int now = cen[y];
        while(now != e)
        {
            if (max(mxs[now], siz[e]-siz[now]) <= siz[e]/2) { cen[e] = now; break; }
            else now = fa[now];
        }
    }
}
signed main(void)
{
    #ifdef LOCAL
//	freopen("C:\\Users\\Loxil\\Desktop\\IN.txt", "r", stdin);
//	freopen("C:\\Users\\Loxil\\Desktop\\OUT.txt", "w", stdout);
    #endif
    
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    int n;
    cin>>n;
    rep(i, 1, n) { int f, t; cin>>f>>t; edge[f].push_back(t); edge[t].push_back(f); }

    dfs(1, -1);

    hrp(i, 1, n) cout<<cen[i]<<endl;
    
    return 0;
}
/*

 */

詳細信息

Test #1:

score: 0
Wrong Answer
time: 152ms
memory: 34108kb

input:

200000
42924 18271
60536 154257
107175 95680
196335 71607
158051 155259
110869 30974
143595 43516
4228 138046
26249 183847
123888 199873
15009 25362
166527 175160
15257 67159
124779 199363
148904 54047
5988 18123
58281 40739
44562 143880
72819 132492
137782 29662
130741 78276
55073 93292
82700 18328...

output:

134385
143670
126220
108393
95313
116080
141180
147983
7428
161963
3879
178499
162544
144413
127262
188325
171802
43558
28179
125217
186651
176397
26425
26982
30063
128965
148036
141733
115691
3491
8560
195673
157186
59629
151346
26305
179308
49505
109185
35638
197352
56126
57109
113226
113988
19933...

result:

wrong answer 1st numbers differ - expected: '1', found: '134385'