結果

問題 No.2290 UnUnion Find
ユーザー siganaisiganai
提出日時 2023-05-05 21:26:50
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 225 ms / 2,000 ms
コード長 6,646 bytes
コンパイル時間 2,570 ms
コンパイル使用メモリ 211,704 KB
実行使用メモリ 13,324 KB
最終ジャッジ日時 2023-08-15 02:54:33
合計ジャッジ時間 13,180 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge11
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
4,380 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 35 ms
4,380 KB
testcase_03 AC 119 ms
8,052 KB
testcase_04 AC 117 ms
8,056 KB
testcase_05 AC 120 ms
8,048 KB
testcase_06 AC 117 ms
8,144 KB
testcase_07 AC 116 ms
8,104 KB
testcase_08 AC 116 ms
8,364 KB
testcase_09 AC 117 ms
8,056 KB
testcase_10 AC 116 ms
8,048 KB
testcase_11 AC 116 ms
8,312 KB
testcase_12 AC 119 ms
8,096 KB
testcase_13 AC 115 ms
8,148 KB
testcase_14 AC 120 ms
8,044 KB
testcase_15 AC 118 ms
8,104 KB
testcase_16 AC 116 ms
8,048 KB
testcase_17 AC 120 ms
8,140 KB
testcase_18 AC 118 ms
8,148 KB
testcase_19 AC 156 ms
8,776 KB
testcase_20 AC 224 ms
13,324 KB
testcase_21 AC 44 ms
4,380 KB
testcase_22 AC 87 ms
5,988 KB
testcase_23 AC 85 ms
5,712 KB
testcase_24 AC 190 ms
10,480 KB
testcase_25 AC 70 ms
5,100 KB
testcase_26 AC 211 ms
12,060 KB
testcase_27 AC 197 ms
10,924 KB
testcase_28 AC 122 ms
7,496 KB
testcase_29 AC 182 ms
9,956 KB
testcase_30 AC 50 ms
4,376 KB
testcase_31 AC 191 ms
9,296 KB
testcase_32 AC 76 ms
5,232 KB
testcase_33 AC 120 ms
7,296 KB
testcase_34 AC 225 ms
13,032 KB
testcase_35 AC 208 ms
11,756 KB
testcase_36 AC 77 ms
5,344 KB
testcase_37 AC 107 ms
6,776 KB
testcase_38 AC 75 ms
5,388 KB
testcase_39 AC 89 ms
5,880 KB
testcase_40 AC 200 ms
11,148 KB
testcase_41 AC 67 ms
4,924 KB
testcase_42 AC 151 ms
8,544 KB
testcase_43 AC 144 ms
8,396 KB
testcase_44 AC 119 ms
8,324 KB
testcase_45 AC 118 ms
8,184 KB
testcase_46 AC 120 ms
8,204 KB
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 # 

#line 1 "main.cpp"
//#pragma GCC target("avx")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>

#ifdef LOCAL
#include <debug.hpp>
#define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (static_cast<void>(0))
#endif
using namespace std;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using pii = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vvvl = vector<vvl>;
using vpii = vector<pii>;
using vpll = vector<pll>;
using vs = vector<string>;
template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;
#define overload4(_1, _2, _3, _4, name, ...) name
#define overload3(a,b,c,name,...) name
#define rep1(n) for (ll UNUSED_NUMBER = 0; UNUSED_NUMBER < (n); ++UNUSED_NUMBER)
#define rep2(i, n) for (ll i = 0; i < (n); ++i)
#define rep3(i, a, b) for (ll i = (a); i < (b); ++i)
#define rep4(i, a, b, c) for (ll i = (a); i < (b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep1(n) for(ll i = (n) - 1;i >= 0;i--)
#define rrep2(i,n) for(ll i = (n) - 1;i >= 0;i--)
#define rrep3(i,a,b) for(ll i = (b) - 1;i >= (a);i--)
#define rrep4(i,a,b,c) for(ll i = (a) + ((b)-(a)-1) / (c) * (c);i >= (a);i -= c)
#define rrep(...) overload4(__VA_ARGS__, rrep4, rrep3, rrep2, rrep1)(__VA_ARGS__)
#define all1(i) begin(i) , end(i)
#define all2(i,a) begin(i) , begin(i) + a
#define all3(i,a,b) begin(i) + a , begin(i) + b
#define all(...) overload3(__VA_ARGS__, all3, all2, all1)(__VA_ARGS__)
#define sum(...) accumulate(all(__VA_ARGS__),0LL)
template<class T> bool chmin(T &a, const T &b){ if(a > b){ a = b; return 1; } else return 0; }
template<class T> bool chmax(T &a, const T &b){ if(a < b){ a = b; return 1; } else return 0; }
template<class T> auto min(const T& a){ return *min_element(all(a)); }
template<class T> auto max(const T& a){ return *max_element(all(a)); }
template<class... Ts> void in(Ts&... t);
#define INT(...) int __VA_ARGS__; in(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__; in(__VA_ARGS__)
#define STR(...) string __VA_ARGS__; in(__VA_ARGS__)
#define CHR(...) char __VA_ARGS__; in(__VA_ARGS__)
#define DBL(...) double __VA_ARGS__; in(__VA_ARGS__)
#define LD(...) ld __VA_ARGS__; in(__VA_ARGS__)
#define VEC(type, name, size) vector<type> name(size); in(name)
#define VV(type, name, h, w) vector<vector<type>> name(h, vector<type>(w)); in(name)
ll intpow(ll a, ll b){ ll ans = 1; while(b){if(b & 1) ans *= a; a *= a; b /= 2;} return ans;}
ll modpow(ll a, ll b, ll p){ ll ans = 1; a %= p;if(a < 0) a += p;while(b){ if(b & 1) (ans *= a) %= p; (a *= a) %= p; b /= 2; } return ans; }
ll GCD(ll a,ll b) { if(a == 0 || b == 0) return 0; if(a % b == 0) return b; else return GCD(b,a%b);}
ll LCM(ll a,ll b) { if(a == 0) return b; if(b == 0) return a;return a / GCD(a,b) * b;}
namespace IO{
#define VOID(a) decltype(void(a))
struct setting{ setting(){cin.tie(nullptr); ios::sync_with_stdio(false);fixed(cout); cout.precision(30);}} setting;
template<int I> struct P : P<I-1>{};
template<> struct P<0>{};
template<class T> void i(T& t){ i(t, P<3>{}); }
void i(vector<bool>::reference t, P<3>){ int a; i(a); t = a; }
template<class T> auto i(T& t, P<2>) -> VOID(cin >> t){ cin >> t; }
template<class T> auto i(T& t, P<1>) -> VOID(begin(t)){ for(auto&& x : t) i(x); }
template<class T, size_t... idx> void ituple(T& t, index_sequence<idx...>){
    in(get<idx>(t)...);}
template<class T> auto i(T& t, P<0>) -> VOID(tuple_size<T>{}){
    ituple(t, make_index_sequence<tuple_size<T>::value>{});}
#undef VOID
}
#define unpack(a) (void)initializer_list<int>{(a, 0)...}
template<class... Ts> void in(Ts&... t){ unpack(IO :: i(t)); }
#undef unpack
static const double PI = 3.1415926535897932;
template <class F> struct REC {
    F f;
    REC(F &&f_) : f(forward<F>(f_)) {}
    template <class... Args> auto operator()(Args &&...args) const { return f(*this, forward<Args>(args)...); }};
//constexpr int mod = 1000000007;
constexpr int mod = 998244353;
#line 1 "library/data-structure/unionfind.hpp"
struct unionfind {
  public:
    unionfind() : _n(0) {}
    explicit unionfind(int n) : _n(n), parent_or_size(n, -1) {}
    int merge(int a, int b) {
        assert(0 <= a && a < _n);
        assert(0 <= b && b < _n);
        int x = find(a), y = find(b);
        if (x == y) return x;
        if (-parent_or_size[x] < -parent_or_size[y]) swap(x, y);
        parent_or_size[x] += parent_or_size[y];
        parent_or_size[y] = x;
        return x;
    }
    bool same(int a, int b) {
        assert(0 <= a && a < _n);
        assert(0 <= b && b < _n);
        return find(a) == find(b);
    }
    int find(int a) {
        assert(0 <= a && a < _n);
        if (parent_or_size[a] < 0) return a;
        return parent_or_size[a] = find(parent_or_size[a]);
    }
    int size(int a) {
        assert(0 <= a && a < _n);
        return -parent_or_size[find(a)];
    }
    vector<vector<int>> groups() {
        vector<int> leader_buf(_n), group_size(_n);
        for (int i = 0; i < _n; i++) {
            leader_buf[i] = find(i);
            group_size[leader_buf[i]]++;
        }
        vector<vector<int>> result(_n);
        for (int i = 0; i < _n; i++) {
            result[i].reserve(group_size[i]);
        }
        for (int i = 0; i < _n; i++) {
            result[leader_buf[i]].push_back(i);
        }
        result.erase(
            remove_if(result.begin(), result.end(),
                           [&](const vector<int>& v) { return v.empty(); }),
            result.end());
        return result;
    }
  private:
    int _n;
    // root node: -1 * component size
    // otherwise: parent
    vector<int> parent_or_size;
};
#line 87 "main.cpp"
int main() {
    INT(n,q);
    unionfind uf(n);
    set<int> s;
    rep(i,n) s.insert(i);

    rep(i,q) {
        INT(cmd);
        if(cmd == 1) {
            INT(u,v);
            --u,--v;
            int pu = uf.find(u);
            int pv = uf.find(v);
            if(pu != pv) {
                s.erase(pu);
                s.erase(pv);
                int puv = uf.merge(pu,pv);
                s.insert(puv);
            }
        }
        else {
            INT(v);
            v--;
            int pv = uf.find(v);
            if(s.size() == 1) {
                cout << -1 << '\n';
            }
            else {
                for(auto &x:s) {
                    if(pv != x) {
                        cout << x + 1 << '\n';
                        break;
                    }
                }
            }
        }
    }
}
0