結果

問題 No.2290 UnUnion Find
ユーザー au7777
提出日時 2023-05-17 23:28:22
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
実行時間 -
コード長 3,284 bytes
コンパイル時間 4,652 ms
コンパイル使用メモリ 249,236 KB
実行使用メモリ 13,984 KB
最終ジャッジ日時 2024-12-15 17:32:43
合計ジャッジ時間 26,070 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge2
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 * 32 WA * 14
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ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
#include <atcoder/all>
typedef long long int ll;
using namespace std;
typedef pair<ll, ll> P;
using namespace atcoder;
template<typename T> using min_priority_queue = priority_queue<T, vector<T>, greater<T>>;
#define USE998244353
#ifdef USE998244353
const ll MOD = 998244353;
// const double PI = 3.141592653589;
using mint = modint998244353;
#else
const ll MOD = 1000000007;
using mint = modint1000000007;
#endif
const int MAX = 3000005;
long long fac[MAX], finv[MAX], inv[MAX];
void COMinit() {
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for (int i = 2; i < MAX; i++){
        fac[i] = fac[i - 1] * i % MOD;
        inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD;
        finv[i] = finv[i - 1] * inv[i] % MOD;
    }
}
long long COM(int n, int k){
    if (n < k) return 0;
    if (n < 0 || k < 0) return 0;
    return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD;
}
ll gcd(ll x, ll y) {
   if (y == 0) return x;
   else if (y > x) {
       return gcd (y, x); 
   }
   else return gcd(x % y, y);
}
ll lcm(ll x, ll y) {
   return x / gcd(x, y) * y;
}
ll my_sqrt(ll x) {
    // 
    ll m = 0;
    ll M = 3000000001;
    while (M - m > 1) {
        ll now = (M + m) / 2;
        if (now * now <= x) {
            m = now;
        }
        else {
            M = now;
        }
    }
    return m;
}
ll keta(ll num, ll arity) {
    ll ret = 0;
    while (num) {
        num /= arity;
        ret++;
    }
    return ret;
}
ll ceil(ll n, ll m) {
    // n > 0, m > 0
    ll ret = n / m;
    if (n % m) ret++;
    return ret;
}
ll pow_ll(ll x, ll n) {
    if (n == 0) return 1;
    if (n % 2) {
        return pow_ll(x, n - 1) * x;
    }
    else {
        ll tmp = pow_ll(x, n / 2);
        return tmp * tmp;
    }
}
vector<ll> compress(vector<ll>& v) {
    // [3 5 5 6 1 1 10 1] -> [1 2 2 3 0 0 4 0] 
    vector<ll> u = v;
    sort(u.begin(), u.end());
    u.erase(unique(u.begin(),u.end()),u.end());
    map<ll, ll> mp;
    for (int i = 0; i < u.size(); i++) {
        mp[u[i]] = i;
    }
    for (int i = 0; i < v.size(); i++) {
        v[i] = mp[v[i]];
    }
    return v;
}
int main() {
    unordered_set<int> us;
    int n, q;
    cin >> n >> q;
    for (int i = 1; i <= n; i++) us.insert(i);
    dsu d(n + 1);
    vector<int> ans;
    for (int i = 0; i < q; i++) {
        int t;
        cin >> t;
        if (t == 1) {
            int u, v;
            cin >> u >> v;
            if (d.same(u, v)) {
                ;
            }
            else {
                int u1 = d.leader(u);
                int v1 = d.leader(v);
                d.merge(u, v);
                if (d.leader(u) == u1) {
                    us.erase(v1);
                }
                else {
                    us.erase(v1);
                }
            }
        }
        else {
            if (us.size() == 1) ans.push_back(-1);
            else {
                int v;
                cin >> v;
                int u = *us.begin();
                if (d.same(u, v)) {
                    auto iter = ++us.begin();
                    ans.push_back(*iter);
                }
                else{
                    ans.push_back(u);
                }
            }
        }
    }
    for (auto x : ans) cout << x << endl;
    return 0;
}
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