| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 1345451 | SpyrosAliv | Island Hopping (JOI24_island) | C++20 | 3 ms | 456 KiB |
#include "island.h"
#include <bits/stdc++.h>
using namespace std;
int n;
vector<int> par;
vector<set<int>> ch;
int get_par(int node) {
for (int i = 1; i <= n-1; i++) {
int nxt = query(node, i);
if (ch[node].find(nxt) == ch[node].end()) return nxt;
}
assert(false);
}
void solve(int N, int L) {
n = N;
par.assign(n+1, -1);
ch.resize(n+1);
int root = 1;
for (int i = n-1; i >= 2; i--) {
int nxt = query(root, i);
par[nxt] = get_par(nxt);
ch[par[nxt]].insert(nxt);
answer(par[nxt], nxt);
}
vector<int> ch;
for (int i = 2; i <= n; i++) {
if (par[i] == -1) {
answer(root, i);
return;
}
}
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