Submission #94228

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
94228	2019-01-16 22:46:20	arknave	Race (IOI11_race)	C++14	100 / 100	1723 ms	53160 KiB

race

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#include "race.h"
#include <bits/stdc++.h>
#define all(x) begin(x), end(x)
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
void dfs_sz(const vector<vector<pii>>& tree, vi& vis, vi& size, int u, int p = -1) {
    size[u] = 1;
    for (auto& e : tree[u]) {
        int v = e.first;
        if (v == p or vis[v])
            continue;
        dfs_sz(tree, vis, size, v, u);
        size[u] += size[v];
    }
}
int find_center(const vector<vector<pii>>& tree, vi& vis, vi& size, int tot, int u, int p = -1) {
    for (auto& e : tree[u]) {
        int v = e.first;
        if (v == p or vis[v]) 
            continue;
        if (2 * size[v] >= tot)
            return find_center(tree, vis, size, tot, v, u);
    }
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57