Submission #856105

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
856105	2023-10-02 16:43:02	wii	Race (IOI11_race)	C++17	100 / 100	353 ms	65984 KiB

race

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#include <iostream>
#include <vector>
using namespace std;
 
const int Lim = 1e6 + 5;
const int maxn = 1e6 + 5;
const int Inf = 1e9 + 7;
typedef pair<int, int> pii;
 
template<class T> bool minimize(T &res, const T &x) { if (x < res) { res = x; return true; } return false; }
 
int n, k;
vector<pii> adj[maxn];
int ans[Lim];
 
int sz[maxn], f[maxn];
int dfs_sz(int u, int p) {
    sz[u] = 1;
    for (auto [v, w]: adj[u]) if (v != p && !f[v]) {
        sz[u] += dfs_sz(v, u);
    }
    return sz[u];
}
 
int find_centroid(int u, int p, int n) {
    for (auto [v, w]: adj[u]) if (v != p && !f[v])
        if (sz[v] * 2 > n) return find_centroid(v, u, n);
    return u;
}
 
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57