結果

問題 No.2290 UnUnion Find
ユーザー DaylightDaylight
提出日時 2023-05-05 22:28:02
言語 D
(dmd 2.106.1)
結果
AC  
実行時間 344 ms / 2,000 ms
コード長 5,646 bytes
コンパイル時間 3,434 ms
コンパイル使用メモリ 242,484 KB
実行使用メモリ 36,268 KB
最終ジャッジ日時 2024-06-22 17:50:01
合計ジャッジ時間 20,918 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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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 1 ms
6,816 KB
testcase_01 AC 2 ms
6,944 KB
testcase_02 AC 159 ms
6,940 KB
testcase_03 AC 291 ms
22,212 KB
testcase_04 AC 233 ms
22,076 KB
testcase_05 AC 233 ms
22,056 KB
testcase_06 AC 234 ms
22,084 KB
testcase_07 AC 233 ms
22,112 KB
testcase_08 AC 232 ms
21,948 KB
testcase_09 AC 229 ms
22,052 KB
testcase_10 AC 235 ms
22,116 KB
testcase_11 AC 227 ms
22,008 KB
testcase_12 AC 232 ms
22,048 KB
testcase_13 AC 236 ms
22,072 KB
testcase_14 AC 238 ms
22,084 KB
testcase_15 AC 233 ms
22,076 KB
testcase_16 AC 236 ms
22,068 KB
testcase_17 AC 238 ms
21,896 KB
testcase_18 AC 226 ms
22,120 KB
testcase_19 AC 271 ms
22,160 KB
testcase_20 AC 330 ms
36,268 KB
testcase_21 AC 170 ms
6,944 KB
testcase_22 AC 210 ms
11,252 KB
testcase_23 AC 211 ms
11,300 KB
testcase_24 AC 309 ms
22,364 KB
testcase_25 AC 203 ms
11,256 KB
testcase_26 AC 338 ms
22,548 KB
testcase_27 AC 330 ms
22,324 KB
testcase_28 AC 258 ms
11,408 KB
testcase_29 AC 303 ms
22,088 KB
testcase_30 AC 176 ms
11,164 KB
testcase_31 AC 283 ms
22,152 KB
testcase_32 AC 199 ms
11,268 KB
testcase_33 AC 246 ms
11,384 KB
testcase_34 AC 344 ms
36,040 KB
testcase_35 AC 332 ms
22,412 KB
testcase_36 AC 202 ms
11,356 KB
testcase_37 AC 231 ms
11,436 KB
testcase_38 AC 210 ms
11,172 KB
testcase_39 AC 219 ms
11,448 KB
testcase_40 AC 328 ms
22,332 KB
testcase_41 AC 194 ms
11,260 KB
testcase_42 AC 281 ms
22,140 KB
testcase_43 AC 262 ms
22,108 KB
testcase_44 AC 228 ms
21,944 KB
testcase_45 AC 246 ms
22,032 KB
testcase_46 AC 256 ms
21,908 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 #

public import std;

DList!string scan_buffer;
DList!char char_buffer;
static this() {
    scan_buffer = DList!(string)();
    char_buffer = DList!(char)();
}

void cin()() {

}

void cin(T, A...)(ref T a, ref A tail) {
    import std.traits : isArray;

    static if (typeof(a).stringof == "string") {
        if (!char_buffer.empty) {
            a = char_buffer.array.map!(x => x.to!string).join();
            char_buffer.clear();
        } else {
            while (scan_buffer.empty) {
                foreach (t; readln.split) {
                    if (t.length == 0) {
                        continue;
                    }
                    scan_buffer.insert(t);
                }
            }
            auto token = scan_buffer.front;
            scan_buffer.removeFront();
            a = token;
        }
    } else static if (typeof(a).stringof == "char") {
        if (!char_buffer.empty) {
            a = char_buffer.front();
            char_buffer.removeFront();
        } else {
            while (scan_buffer.empty) {
                foreach (t; readln.split) {
                    if (t.length == 0) {
                        continue;
                    }
                    scan_buffer.insert(t);
                }
            }
            auto token = scan_buffer.front;
            scan_buffer.removeFront();
            a = token[0];
            if (token.length > 1) {
                foreach (c; token[1 .. $]) {
                    char_buffer.insertBack(c);
                }
            }
        }
    } else static if (typeof(a).stringof == "char[]") {
        if (a.length == 0) {
            string token;
            cin(token);
            foreach (c; token) {
                a ~= c;
            }
        } else {
            foreach (ref v; a) {
                cin(v);
            }
        }
    } else static if (isArray!(typeof(a))) {
        foreach (ref v; a) {
            cin(v);
        }
    } else static if (isTuple!(typeof(a))) {
        foreach (i, _; a) {
            cin(a[i]);
        }
    } else {
        if (!char_buffer.empty) {
            writeln(char_buffer.array.map!(x => x.to!string));
            a = char_buffer.array.map!(x => x.to!string).join().to!T;
            char_buffer.clear();
        } else {
            while (scan_buffer.empty) {
                foreach (t; readln.split) {
                    if (t.length == 0) {
                        continue;
                    }
                    scan_buffer.insert(t);
                }
            }
            auto token = scan_buffer.front;
            scan_buffer.removeFront();
            a = token.to!T;
        }
    }
    cin(tail);
}

bool chmin(T)(ref T a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}

bool chmax(T)(ref T a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

alias PQueue(T = long, alias less = "a<b") = BinaryHeap!(Array!T, less);


class Dsu {
public:
    this(long n) @safe nothrow {
        _n = cast(int) n, parent_or_size = new int[](n);
        parent_or_size[] = -1;
    }

    int merge(long a, long b) @safe nothrow @nogc {
        assert(0 <= a && a < _n);
        assert(0 <= b && b < _n);
        int x = leader(a), y = leader(b);
        if (x == y)
            return x;
        if (-parent_or_size[x] < -parent_or_size[y]) {
            auto tmp = x;
            x = y;
            y = tmp;
        }
        parent_or_size[x] += parent_or_size[y];
        parent_or_size[y] = x;
        return x;
    }

    bool same(long a, long b) @safe nothrow @nogc {
        assert(0 <= a && a < _n);
        assert(0 <= b && b < _n);
        return leader(a) == leader(b);
    }


    int leader(long a) @safe nothrow @nogc {
        assert(0 <= a && a < _n);
        if (parent_or_size[a] < 0)
            return cast(int) a;
        return parent_or_size[a] = leader(parent_or_size[a]);
    }

    int size(long a) @safe nothrow @nogc {
        assert(0 <= a && a < _n);
        return -parent_or_size[leader(a)];
    }

    int[][] groups() @safe nothrow {
        auto leader_buf = new int[](_n), group_size = new int[](_n);
        foreach (i; 0 .. _n) {
            leader_buf[i] = leader(i);
            group_size[leader_buf[i]]++;
        }
        auto result = new int[][](_n);
        foreach (i; 0 .. _n)
            result[i].reserve(group_size[i]);
        foreach (i; 0 .. _n)
            result[leader_buf[i]] ~= i;
        int[][] filtered;
        foreach (r; result)
            if (r.length != 0)
                filtered ~= r;
        return filtered;
    }

private:
    int _n;
    int[] parent_or_size;
}

void main() {
    int N, Q;
    cin(N, Q);
    auto dsu = new Dsu(N);
    auto set = new RedBlackTree!long();
    foreach (i; 0 .. N) {
        set.insert(i);
    }
    foreach (q; 0 .. Q) {
        int k;
        cin(k);
        if (k == 1) {
            int u, v;
            cin(u, v);
            u--;
            v--;
            if (dsu.same(u, v))
                continue;
            int G = dsu.leader(u) ^ dsu.leader(v);
            G ^= dsu.merge(u, v);
            set.removeKey(G);
        } else {
            int v;
            cin(v);
            v--;
            v = dsu.leader(v);
            auto it = set.upperBound(v);
            if (!it.empty()) {
                (it.front() + 1).writeln;
            } else {
                it = set.lowerBound(v);
                if (it.empty()) {
                    writeln(-1);
                } else {
                    (it.front() + 1).writeln;
                }
            }
        }
    }
}
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