結果
| 問題 |
No.3237 Find the Treasure!
|
| コンテスト | |
| ユーザー |
hint908
|
| 提出日時 | 2025-08-15 22:12:32 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,097 bytes |
| コンパイル時間 | 3,372 ms |
| コンパイル使用メモリ | 290,676 KB |
| 実行使用メモリ | 25,972 KB |
| 平均クエリ数 | 16.00 |
| 最終ジャッジ日時 | 2025-08-15 22:12:49 |
| 合計ジャッジ時間 | 12,197 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 18 WA * 4 |
ソースコード
// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
using namespace std;
using uint = unsigned int;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
template<class T> using V = vector<T>;
template<class T> using VV = V<V<T>>;
template<class T> using VVV = V<VV<T>>;
template<class T> using VVVV = VV<VV<T>>;
#define rep(i,n) for(ll i=0ll;(i)<(n);(i)++)
#define REP(i,a,n) for(ll i=(a);(i)<(n);(i)++)
#define rrep(i,n) for(ll i=(n)-1;(i)>=(0ll);(i)--)
#define RREP(i,a,n) for(ll i=(n)-1;(i)>=(a);(i)--)
const long long INF = (1LL << 60);
const long long mod99 = 998244353;
const long long mod107 = 1000000007;
const long long mod = mod99;
#define eb emplace_back
#define be(v) (v).begin(),(v).end()
#define all(v) (v).begin(),(v).end()
#define foa(i,v) for(auto& (i) : (v))
#define UQ(v) sort(be(v)), (v).erase(unique(be(v)), (v).end())
#define UQ2(v,cmp) sort(be(v)), (v).erase(unique(be(v),cmp), (v).end())
#define UQ3(v,cmp) sort(be(v),cmp), (v).erase(unique(be(v)), (v).end())
#define UQ4(v,cmp,cmp2) sort(be(v), cmp), (v).erase(unique(be(v),cmp2), (v).end())
#define LB(x,v) (lower_bound(be(v),(x))-(v).begin())
#define LB2(x,v,cmp) (lower_bound(be(v),(x),(cmp))-(v).begin())
#define UB(x,v) (upper_bound(be(v),(x))-(v).begin())
#define UB2(x,v,cmp) (upper_bound(be(v),(x),(cmp))-(v).begin())
#define dout() cout << fixed << setprecision(20)
#define randinit() srand((unsigned)time(NULL))
template<class T, class U> bool chmin(T& t, const U& u) { if (t > u){ t = u; return 1;} return 0; }
template<class T, class U> bool chmax(T& t, const U& u) { if (t < u){ t = u; return 1;} return 0; }
ll Rnd(ll L=0, ll R=mod99){return rand()%(R-L)+L;}
void solve(){
ll n;
cin >> n;
V<ll> u(n-1), v(n-1);
VV<ll> G(n);
rep(i, n-1){
cin >> u[i] >> v[i];
u[i]--;
v[i]--;
G[u[i]].eb(v[i]);
G[v[i]].eb(u[i]);
}
V<ll> dist(n, INF);
dist[0] = 0;
queue<ll> que;
que.push(0);
while(!que.empty()){
ll nd = que.front();
que.pop();
for(auto nx:G[nd]) if(chmin(dist[nx], dist[nd])) que.push(nx);
}
V<ll> x(n-1);
V<ll> pos(n, 1);
auto query = [&]() -> bool {
cout << "?";
for(auto val:x) cout << " " << val+1;
cout << endl;
string s;
cin >> s;
if(s[0] == 'Y'){
V<ll> tmp(n, 0);
for(auto val:x) tmp[val] = 1;
rep(i, n) pos[i] &= tmp[i];
return 1;
}else{
for(auto val:x) pos[val] = 0;
}
return s[0] == 'Y';
};
rep(i, n-1) if(dist[u[i]]%2) swap(u[i], v[i]);
V<ll> ord(n-1);
rep(i, n-1) ord[i] = i;
auto shuf = [&]() -> void {
rep(i, n-2) swap(ord[i], ord[Rnd(i, n-1)]);
};
for(ll q=14; q >= 0; q--){
ll rest = 0;
for(auto x:pos) rest += x;
V<ll> see(n, 0);
rep(i, n-1){
x[i] = u[i];
see[x[i]]++;
}
ll use = 0;
rep(i, n) use += (see[i] > 0) and (pos[i] == 1);
if((rest+1) / 2 < use){
rep(i, n-1){
if((rest+1)/2 < use and (pos[x[i]] or see[x[i]] >= 2)){
use -= (see[x[i]]-- == 1) and pos[x[i]];
x[i] = u[i] + v[i] - x[i];
use += (see[x[i]]++ == 0) and pos[x[i]];
}
}
}else if((rest+1) / 2 > use){
rep(i, n-1){
if((rest+1)/2 > use and (!pos[x[i]] or see[x[i]] >= 2)){
use -= (see[x[i]]-- == 1) and pos[x[i]];
x[i] = u[i] + v[i] - x[i];
use += (see[x[i]]++ == 0) and pos[x[i]];
}
}
}
// cout << rest << " " << use << endl;
query();
}
ll ans = 0;
while(!pos[ans]) ans++;
cout << "! " << ans+1 << endl;
}
int main(){
cin.tie(nullptr);
ios::sync_with_stdio(false);
int t=1;
// cin >> t;
rep(i,t) solve();
}
hint908