結果

問題 No.2290 UnUnion Find
コンテスト
ユーザー vjudge1
提出日時 2025-07-12 00:35:19
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 56 ms / 2,000 ms
コード長 2,943 bytes
コンパイル時間 5,678 ms
コンパイル使用メモリ 253,772 KB
実行使用メモリ 7,844 KB
最終ジャッジ日時 2025-07-12 00:35:34
合計ジャッジ時間 14,223 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1
other AC * 46
権限があれば一括ダウンロードができます

ソースコード

diff # 

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using lll = __int128_t;
using ld = long double;
using pll = pair<ll, ll>;
using vi = vector<ll>;
using vd = vector<ld>;
using vp = vector<pll>;
using vS = vector<string>;
using vvi = vector<vi>;
using vvd = vector<vd>;
using vvp = vector<vp>;
using v3i = vector<vvi>;
using v3d = vector<vvd>;
using v3p = vector<vvp>;
using v4i = vector<v3i>;
using v5i = vector<v4i>;
using v6i = vector<v5i>;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using Mint = modint1000000007;
using vm = vector<mint>;
using vM = vector<Mint>;
using vvm = vector<vm>;
using vvM = vector<vM>;
using v3m = vector<vvm>;
using v3M = vector<vvM>;
using v4m = vector<v3m>;
using v5m = vector<v4m>;
#endif
template <typename T>
using r_pQ = priority_queue<T, vector<T>, greater<T>>;
#define rrep(i, n) for (ll i = (n)-1; (i) >= 0; --(i))
#define rep(i, n) for (ll i = 0; (i) < (n); ++(i))
#define loop(i, a) for(ll i = a; true; ++(i))
#define reps(i, n) for (ll i = 1; (i) <= (n); ++(i))
#define Rep(i,a,b) for(ll i = (a); i <= (b); i++)
#define all(a) (a).begin(),(a).end()
const ll MOD = 998244353;
const ll Hash = 10000000000000061;
#define Yes(b) ((b)?cout << "Yes" << endl:cout << "No" << endl)
#define YES(b) ((b)?cout << "YES" << endl:cout << "NO" << endl)
#define Aoki(b) ((b)?cout << "Aoki" << endl:cout << "Takahashi" << endl)
#define out(x) cout << (x) << endl
#define vout(v) for(auto x : (v)) cout << x << ' ';
#define vin(v) rep(i, (v).size()) cin >> (v)[i]
#define vin_(v); rep(i, (v).size()) {cin >> (v)[i]; (v)[i]--;}
#define vvin(v, w) rep(i, (v).size()) { rep(k, (w)) { cin >> (v)[i][k]; } }
#define ft first
#define sd second
#define vInP(v) rep(i, (v).size()) cin >> (v)[i].ft >> (v)[i].sd
#define vInP_(v) rep(i, (v).size()) {cin >> (v)[i].ft >> (v)[i].sd; (v)[i].ft--; (v)[i].sd--;}
bool chmin(ll& a, ll b) { return a > b ? a = b, 1 : 0; }
bool chmax(ll& a, ll b) { return a < b ? a = b, 1 : 0; }
vi s90 = { 0, 1, 0, -1 }, c90 = { 1, 0, -1, 0 };
vi s45 = { 0, 1, 1, 1, 0, -1, -1, -1 }, c45 = { 1, 1, 0, -1, -1, -1, 0, 1 };

void solve();

signed main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);

    int t = 1;
    // cin >> t;
    rep(i, t) solve();
}

void solve(){
    ll N, Q; cin >> N >> Q;
    dsu U(N);
    ll X = 1;
    while(Q--){
        ll q; cin >> q;
        if(q == 1){
            ll u, v; cin >> u >> v; u--; v--;
            U.merge(u, v);
            while(X < N && U.same(0, X)) X++;
        }else{
            ll v; cin >> v; v--;
            if(X == N) cout << -1 << "\n";
            else{
                if(U.same(0, v)) cout << X+1 << "\n";
                else cout << 1 << "\n";
            }
        }
    }
    cout << flush;
}
0