oj.uz

Submission #218759

# Submission time Handle Problem Language Result Execution time Memory
218759 2020-04-02T17:19:49 Z Vimmer Matching (COCI20_matching) C++14
58 / 110
 1640 ms 524288 KB 
#include <bits/stdc++.h>

//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define N 100001

using namespace std;

int x[N], y[N], a[N][2], n, xr[N], yr[N];

set <int> tx[N * 4], ty[N * 4], alone;

set <pair <int, int> > tx_del[N * 4], ty_del[N * 4];

vector <pair <int, char> > psh[N * 4];

vector <pair <pair <int, int>, char>  > psh_del[N * 4];

bool mk[N], mkr[N][2];

vector <pair <int, int> > g, gr;

void Push(int v, int tl, int tr)
{
    while (sz(psh[v]) > 0)
    {
        pair <int, char> val = psh[v].back();

        psh[v].pop_back();

        if (val.S == 'a') tx[v].insert(val.F); else ty[v].insert(val.F);

        if (tl != tr) {psh[v + v].pb(val); psh[v + v + 1].pb(val);}
    }

}
void upd(int v, int tl, int tr, int l, int r, int val, bool f)
{
    if (r < tl || tr < l) return;

    if (l <= tl && tr <= r) {if (!f) psh[v].pb({val, 'a'}); else psh[v].pb({val, 'b'}); return;}

    int md = (tl + tr) >> 1;

    upd(v + v, tl, md, l, r, val, f);

    upd(v + v + 1, md + 1, tr, l, r, val, f);
}

void Push_del(int v, int tl, int tr)
{
    while (sz(psh_del[v]) > 0)
    {
        pair <pair <int, int>, char>  pt = psh_del[v].back();

        psh_del[v].pop_back();

        if (pt.S == 'a') tx_del[v].insert(pt.F); else if (pt.S == 'b') ty_del[v].insert(pt.F);
          else if (pt.S == 'c') tx_del[v].erase(pt.F); else ty_del[v].erase(pt.F);

        if (tl != tr) {psh_del[v + v].pb(pt); psh_del[v + v + 1].pb(pt); }
    }
}

void upd_del(int v, int tl, int tr, int l, int r, pair <int, int> val, bool f)
{
    if (tl > tr || l > r || r < tl || tr < l) return;

    if (l <= tl && tr <= r) {if (!f) psh_del[v].pb({val, 'a'}); else psh_del[v].pb({val, 'b'}); return;}

    int md = (tl + tr) >> 1;

    upd_del(v + v, tl, md, l, r, val, f);

    upd_del(v + v + 1, md + 1, tr, l, r, val, f);
}

void upd_remove(int v, int tl, int tr, int l, int r, pair <int, int> val, bool f)
{
    if (tl > tr || l > r || r < tl || tr < l) return;

    if (l <= tl && tr <= r) {if (!f) psh_del[v].pb({val, 'c'}); else psh_del[v].pb({val, 'd'}); return;}

    int md = (tl + tr) >> 1;

    upd_remove(v + v, tl, md, l, r, val, f);

    upd_remove(v + v + 1, md + 1, tr, l, r, val, f);
}

bool good(int v, int tl, int tr, int pos, int l, int r, bool f)
{
    Push(v, tl, tr);

    if (tl == tr)
    {
        set <int> :: iterator it;

        if (f)
        {
            it = ty[v].lower_bound(l);

            return (it == ty[v].end() ? 1 : *it > r);
        }
        else
        {
            it = tx[v].lower_bound(l);

            return (it == tx[v].end() ? 1 : *it > r);
        }
    }
    else
    {
        int md = (tl + tr) >> 1;

        if (pos <= md) return good(v + v, tl, md, pos, l, r, f);

        return good(v + v + 1, md + 1, tr, pos, l, r, f);
    }
}

void add_remove(int fr, int sc, int nm)
{
    if (!mk[fr]) alone.insert(fr);

    if (!mk[sc]) alone.insert(sc);

//    if (x[fr] == x[sc])
//    {
//        if (y[fr] > y[sc]) swap(fr, sc);
//
//        upd_remove(1, 1, N, y[fr], y[sc], {x[fr], nm }, 1);
//    }
//    else
//    {
//        if (x[fr] > x[sc]) swap(fr, sc);
//
//        upd_remove(1, 1, N, x[fr], x[sc], {y[fr], nm }, 0);
//    }
}

void good_del(int v, int tl, int tr, int pos, int l, int r, bool f)
{
    Push_del(v, tl, tr);

    if (tl == tr)
    {
        set <pair <int, int> > :: iterator it;

        if (f)
        {
            it = ty_del[v].lower_bound({l, -1e9});

            while (it != ty_del[v].end() && (*it).F <= r) {add_remove(gr[(*it).S].F, gr[(*it).S].S, (*it).S); it++;}
        }
        else
        {
            it = tx_del[v].lower_bound({l, -1e9});

            while (it != tx_del[v].end() && (*it).F <= r) {add_remove(gr[(*it).S].F, gr[(*it).S].S, (*it).S); it++;}
        }
    }
    else
    {
        int md = (tl + tr) >> 1;

        if (pos <= md) good_del(v + v, tl, md, pos, l, r, f);
          else  good_del(v + v + 1, md + 1, tr, pos, l, r, f);
    }
}

bool gd(int fr, int sc)
{
    if (x[fr] == x[sc])
    {
        if (y[fr] > y[sc]) swap(fr, sc);

        return good(1, 1, N - 1, x[fr], y[fr], y[sc], 0);
    }
    else
    {
        if (x[fr] > x[sc]) swap(fr, sc);

        return good(1, 1, N - 1, y[fr], x[fr], x[sc], 1);
    }
}

void seacrh(int fr, int sc)
{
    if (x[fr] == x[sc])
    {
        if (y[fr] > y[sc]) swap(fr, sc);

        good_del(1, 1, N, x[fr], y[fr], y[sc], 0);
    }
    else
    {
        if (x[fr] > x[sc]) swap(fr, sc);

        good_del(1, 1, N, y[fr], x[fr], x[sc], 1);
    }
}

void add(int fr, int sc)
{
    if (x[fr] == x[sc])
    {
        g.pb({fr, sc});

        if (y[fr] > y[sc]) swap(fr, sc);

        upd(1, 1, N - 1, y[fr], y[sc], x[fr], 1);

        seacrh(fr, sc);
    }
    else
    {
        g.pb({fr, sc});

        if (x[fr] > x[sc]) swap(fr, sc);

        upd(1, 1, N - 1, x[fr], x[sc], y[fr], 0);

        seacrh(fr, sc);
    }
}

void clr(int x)
{
    mk[x] = 1;

    if (a[x][1] != -1) {if (!mk[a[x][1]])  alone.insert(a[x][1]); a[x][1] = a[a[x][1]][1] = -1;}

    if (a[x][0] != -1) {if (!mk[a[x][0]])  alone.insert(a[x][0]); a[x][0] = a[a[x][0]][0] = -1;}
}


void fnd()
{
    while (sz(alone) > 0)
    {
        int v = *alone.begin();

        alone.erase(alone.begin());

        if (mk[v]) continue;

        if (a[v][1] != -1 && gd(v, a[v][1])) {add(v, a[v][1]); clr(a[v][1]); clr(v); continue;}

        if (a[v][0] != -1 && gd(v, a[v][0])) {add(v, a[v][0]); clr(a[v][0]); clr(v); continue;}

        cout << "NE" << endl;

        exit(0);
    }

    for (int i = 0; i < n; i++)
    {
        if (mk[i]) continue;

        g.pb({i, a[i][0]});

        clr(a[i][0]);

        clr(i);
    }
}

void add_del(int fr, int sc)
{
    if (x[fr] == x[sc])
    {
        if (mkr[fr][0]) return;

        mkr[fr][0] = 1;

        mkr[sc][0] = 1;

        if (y[fr] > y[sc]) swap(fr, sc);

        upd_del(1, 1, N, y[fr], y[sc], {x[fr], sz(gr) }, 1);

        gr.pb({fr, sc});
    }
    else
    {
        if (mkr[fr][1]) return;

        mkr[fr][1] = 1;

        mkr[sc][1] = 1;

        if (x[fr] > x[sc]) swap(fr, sc);

        upd_del(1, 1, N, x[fr], x[sc], {y[fr], sz(gr) }, 0);

        gr.pb({fr, sc});
    }
}
int main()
{
    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n;

    for (int i = 1; i < N; i++) xr[i] = yr[i] = -1;

    for (int i = 0; i < n; i++) {cin >> x[i] >> y[i]; a[i][0] = a[i][1] = -1;}

    for (int i = 0; i < n; i++)
        {
            int X = x[i], Y = y[i];

            if (xr[X] == -1) xr[X] = i; else {a[i][0] = xr[X]; a[xr[X]][0] = i;}

            if (yr[Y] == -1) yr[Y] = i; else {a[i][1] = yr[Y]; a[yr[Y]][1] = i;}
        }

    for (int i = 0; i < n; i++)
    {
        if (a[i][0] == a[i][1] && a[i][1] == -1) {cout << "NE" << endl; exit(0);}

        if (a[i][0] == -1 || a[i][1] == -1) alone.insert(i); else {add_del(i, a[i][0]); add_del(i, a[i][1]);}
    }

    fnd();

    if (sz(g) != n / 2) {cout << "NE" << endl; exit(0);}

    cout << "DA" << endl;

    for (auto it : g) cout << it.F + 1 << " " << it.S + 1 << endl;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 95224 KB Output is correct
2 Correct 59 ms 95096 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 95224 KB Output is correct
2 Correct 59 ms 95096 KB Output is correct
3 Correct 59 ms 95096 KB Output is correct
4 Correct 62 ms 95096 KB Output is correct
5 Correct 59 ms 95096 KB Output is correct
6 Correct 59 ms 95096 KB Output is correct
7 Correct 59 ms 95096 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 95224 KB Output is correct
2 Correct 59 ms 95096 KB Output is correct
3 Correct 59 ms 95096 KB Output is correct
4 Correct 62 ms 95096 KB Output is correct
5 Correct 59 ms 95096 KB Output is correct
6 Correct 59 ms 95096 KB Output is correct
7 Correct 59 ms 95096 KB Output is correct
8 Correct 61 ms 95224 KB Output is correct
9 Correct 60 ms 95144 KB Output is correct
10 Correct 59 ms 95096 KB Output is correct
11 Correct 59 ms 95096 KB Output is correct
12 Correct 63 ms 95096 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 95224 KB Output is correct
2 Correct 59 ms 95096 KB Output is correct
3 Correct 59 ms 95096 KB Output is correct
4 Correct 62 ms 95096 KB Output is correct
5 Correct 59 ms 95096 KB Output is correct
6 Correct 59 ms 95096 KB Output is correct
7 Correct 59 ms 95096 KB Output is correct
8 Correct 61 ms 95224 KB Output is correct
9 Correct 60 ms 95144 KB Output is correct
10 Correct 59 ms 95096 KB Output is correct
11 Correct 59 ms 95096 KB Output is correct
12 Correct 63 ms 95096 KB Output is correct
13 Correct 67 ms 96120 KB Output is correct
14 Correct 68 ms 96436 KB Output is correct
15 Correct 68 ms 96504 KB Output is correct
16 Correct 71 ms 96680 KB Output is correct
17 Correct 74 ms 97148 KB Output is correct
18 Correct 66 ms 96120 KB Output is correct
19 Correct 69 ms 96376 KB Output is correct
20 Correct 65 ms 95864 KB Output is correct
21 Correct 69 ms 95608 KB Output is correct
22 Correct 72 ms 95480 KB Output is correct
23 Correct 165 ms 125432 KB Output is correct
24 Correct 157 ms 123000 KB Output is correct

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 95224 KB Output is correct
2 Correct 59 ms 95096 KB Output is correct
3 Correct 59 ms 95096 KB Output is correct
4 Correct 62 ms 95096 KB Output is correct
5 Correct 59 ms 95096 KB Output is correct
6 Correct 59 ms 95096 KB Output is correct
7 Correct 59 ms 95096 KB Output is correct
8 Correct 61 ms 95224 KB Output is correct
9 Correct 60 ms 95144 KB Output is correct
10 Correct 59 ms 95096 KB Output is correct
11 Correct 59 ms 95096 KB Output is correct
12 Correct 63 ms 95096 KB Output is correct
13 Correct 67 ms 96120 KB Output is correct
14 Correct 68 ms 96436 KB Output is correct
15 Correct 68 ms 96504 KB Output is correct
16 Correct 71 ms 96680 KB Output is correct
17 Correct 74 ms 97148 KB Output is correct
18 Correct 66 ms 96120 KB Output is correct
19 Correct 69 ms 96376 KB Output is correct
20 Correct 65 ms 95864 KB Output is correct
21 Correct 69 ms 95608 KB Output is correct
22 Correct 72 ms 95480 KB Output is correct
23 Correct 165 ms 125432 KB Output is correct
24 Correct 157 ms 123000 KB Output is correct
25 Correct 1152 ms 306008 KB Output is correct
26 Correct 1640 ms 423968 KB Output is correct
27 Correct 977 ms 266684 KB Output is correct
28 Correct 1125 ms 307176 KB Output is correct
29 Correct 659 ms 223720 KB Output is correct
30 Correct 648 ms 223080 KB Output is correct
31 Correct 1133 ms 341352 KB Output is correct
32 Correct 893 ms 282988 KB Output is correct
33 Correct 260 ms 127340 KB Output is correct
34 Correct 304 ms 133356 KB Output is correct
35 Correct 151 ms 103916 KB Output is correct
36 Correct 393 ms 123756 KB Output is correct
37 Runtime error 1352 ms 524288 KB Execution killed with signal 9 (could be triggered by violating memory limits)
38 Halted 0 ms 0 KB -