oj.uz

Submission #979895

# Submission time Handle Problem Language Result Execution time Memory
979895 2024-05-11T15:15:40 Z Mher777 Swapping Cities (APIO20_swap) C++17
7 / 100
 657 ms 524288 KB 
#include "swap.h"
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <array>
#include <string>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <list>
#include <iterator>
#include <numeric>
#include <complex>
#include <utility>
#include <random>
#include <cassert>
#include <fstream>
using namespace std;
mt19937 rnd(7069);
typedef int itn;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef float fl;
typedef long double ld;
using vi = vector<int>;
using vll = vector<ll>;
using mii = map<int, int>;
using mll = map<ll, ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define ff first
#define ss second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define mpr make_pair
#define yes cout<<"Yes\n"
#define no cout<<"No\n"
#define all(x) (x).begin(), (x).end()
const int dx[8] = { -1, 0, 1, 0, -1, -1, 1, 1 };
const int dy[8] = { 0, -1, 0, 1, -1, 1, -1, 1 };
const int MAX = int(1e9 + 5);
const ll MAXL = ll(1e18) + 5ll;
const ll MOD = ll(1000000007);
const ll MOD2 = ll(998244353);

const int N = 100005;
pii val[N], t[N * 4];
int dep[N], tp[N], id[N], p[N], sub[N], dp1[N], dp2[N];
vector<pii> g[N];
int n, m, timer;

void dfs_sz(int u = 1, int par = 1) {
    dp1[u] = dp2[u] = MAX;
    if ((int)g[u].size() >= 3) {
        dp1[u] = dp2[u] = g[u][2].ff;
    }
    sub[u] = 1;
    p[u] = par;
    for (auto to : g[u]) {
        if (to.ss == par) continue;
        dep[to.ss] = dep[u] + 1;
        dfs_sz(to.ss, u);
        dp1[u] = min(dp1[u], max(to.ff, dp1[to.ss]));
        sub[u] += sub[to.ss];
    }
}

void dfs_dp(int u = 1, int par = 1, int cur = 0) {
    dp2[u] = min(dp2[u], max(cur, dp2[par]));
    vi v;
    int sz = 0;
    for (auto to : g[u]) {
        if (to.ss == par) continue;
        ++sz;
        v.pub(max(dp1[to.ss], to.ff));
    }
    if (!sz) return;
    vi pref(sz), suf(sz);
    pref[0] = v[0];
    for (int i = 1; i < sz; ++i) {
        pref[i] = min(pref[i - 1], v[i]);
    }
    suf[sz - 1] = v[sz - 1];
    for (int i = sz - 2; i >= 0; --i) {
        suf[i] = min(suf[i + 1], v[i]);
    }
    int ind = 0;
    for (auto to : g[u]) {
        if (to.ss == par) continue;
        dp2[to.ss] = dp2[u];
        int mn = MAX;
        if (ind != 0) mn = min(mn, max(pref[ind - 1], to.ff));
        if (ind != sz - 1) mn = min(mn, max(suf[ind + 1], to.ff));
        dp2[to.ss] = min(dp2[to.ss], mn);
    }
    for (auto to : g[u]) {
        if (to.ss == par) continue;
        dfs_dp(to.ss, u, to.ff);
    }
}

void dfs_hld(int u = 1, int top = 1, int cur = 0) {
    tp[u] = top;
    id[u] = ++timer;
    val[id[u]] = { cur,min(dp1[u],dp2[u]) };
    int mx = 0, v = -1;
    ll curx = 0;
    for (auto to : g[u]) {
        if (to.ss == p[u]) continue;
        if (sub[to.ss] > mx) {
            mx = sub[to.ss];
            v = to.ss;
            curx = to.ff;
        }
    }
    if (v != -1) dfs_hld(v, top, curx);
    for (auto to : g[u]) {
        if (to.ss == p[u] || to.ss == v) continue;
        dfs_hld(to.ss, to.ss, to.ff);
    }
}

void bld(int l = 1, int r = n, int pos = 1) {
    if (l == r) {
        t[pos] = val[l];
        return;
    }
    int mid = (l + r) / 2;
    bld(l, mid, 2 * pos);
    bld(mid + 1, r, 2 * pos + 1);
    t[pos].ff = max(t[2 * pos].ff, t[2 * pos + 1].ff);
    t[pos].ss = min(t[2 * pos].ss, t[2 * pos + 1].ss);
}

int qry(int l, int r, int type, int tl = 1, int tr = n, int pos = 1) {
    if (l == tl && r == tr) {
        return (type == 1 ? t[pos].ff : t[pos].ss);
    }
    int mid = (tl + tr) / 2;
    if (mid >= r) {
        return qry(l, r, type, tl, mid, 2 * pos);
    }
    if (mid < l) {
        return qry(l, r, type, mid + 1, tr, 2 * pos + 1);
    }
    if (type == 1) {
        return max(qry(l, mid, type, tl, mid, 2 * pos), qry(mid + 1, r, type, mid + 1, tr, 2 * pos + 1));
    }
    return min(qry(l, mid, type, tl, mid, 2 * pos), qry(mid + 1, r, type, mid + 1, tr, 2 * pos + 1));
}

void init(int N, int M, vi U, vi V, vi W) {
    n = N, m = M;
    for (int i = 0; i < m; ++i) {
        ++U[i];
        ++V[i];
        g[U[i]].pub({ W[i],V[i] });
        g[V[i]].pub({ W[i],U[i] });
    }
    for (int i = 1; i <= n; ++i) {
        sort(all(g[i]));
    }
    dfs_sz();
    dfs_dp();
    dfs_hld();
    bld();
}

int query1(int x, int y) {
    int ret = 0;
    while (tp[x] != tp[y]) {
        if (dep[tp[x]] < dep[tp[y]]) swap(x, y);
        ret = max(ret, qry(id[tp[x]], id[x], 1));
        x = p[tp[x]];
    }
    if (dep[x] > dep[y]) swap(x, y);
    if (x == y) return ret;
    ret = max(ret, qry(id[x] + 1, id[y], 1));
    return ret;
}

int query2(int x, int y) {
    int ret = MAX;
    while (tp[x] != tp[y]) {
        if (dep[tp[x]] < dep[tp[y]]) swap(x, y);
        ret = min(ret, qry(id[tp[x]], id[x], 2));
        x = p[tp[x]];
    }
    if (dep[x] > dep[y]) swap(x, y);
    ret = min(ret, qry(id[x], id[y], 2));
    return ret;
}

int getMinimumFuelCapacity(int X, int Y) {
    int x = X, y = Y;
    ++x, ++y;
    int num1 = query1(x, y), num2 = query2(x, y);
    if (num2 == MAX) return -1;
    return max(num1, num2);
}

/*
15 14
0 1 2
0 2 1
1 3 1
1 4 1
2 5 1
2 6 1
3 7 1
3 8 1
4 9 1
4 10 1
5 11 1
5 12 1
6 13 1
6 14 1
1
*/

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Correct 1 ms 6748 KB Output is correct
3 Correct 2 ms 6748 KB Output is correct
4 Correct 2 ms 6748 KB Output is correct
5 Correct 2 ms 7004 KB Output is correct
6 Correct 2 ms 7004 KB Output is correct
7 Correct 2 ms 7004 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Correct 62 ms 26796 KB Output is correct
10 Correct 89 ms 35840 KB Output is correct
11 Correct 75 ms 33616 KB Output is correct
12 Correct 83 ms 36112 KB Output is correct
13 Correct 105 ms 42412 KB Output is correct
14 Correct 76 ms 24508 KB Output is correct
15 Correct 246 ms 36512 KB Output is correct
16 Correct 247 ms 30036 KB Output is correct
17 Correct 240 ms 44112 KB Output is correct
18 Correct 244 ms 38912 KB Output is correct
19 Runtime error 657 ms 524288 KB Execution killed with signal 9
20 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Correct 1 ms 6748 KB Output is correct
3 Correct 182 ms 20820 KB Output is correct
4 Correct 211 ms 20736 KB Output is correct
5 Correct 184 ms 20952 KB Output is correct
6 Correct 175 ms 20748 KB Output is correct
7 Correct 182 ms 20960 KB Output is correct
8 Correct 180 ms 20616 KB Output is correct
9 Correct 178 ms 20820 KB Output is correct
10 Correct 176 ms 20524 KB Output is correct

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Correct 1 ms 6748 KB Output is correct
3 Correct 2 ms 6748 KB Output is correct
4 Correct 2 ms 6748 KB Output is correct
5 Correct 2 ms 7004 KB Output is correct
6 Correct 2 ms 7004 KB Output is correct
7 Correct 2 ms 7004 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Runtime error 331 ms 524288 KB Execution killed with signal 9
10 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 331 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Correct 1 ms 6748 KB Output is correct
3 Correct 2 ms 6748 KB Output is correct
4 Correct 2 ms 6748 KB Output is correct
5 Correct 2 ms 7004 KB Output is correct
6 Correct 2 ms 7004 KB Output is correct
7 Correct 2 ms 7004 KB Output is correct
8 Correct 2 ms 7004 KB Output is correct
9 Correct 62 ms 26796 KB Output is correct
10 Correct 89 ms 35840 KB Output is correct
11 Correct 75 ms 33616 KB Output is correct
12 Correct 83 ms 36112 KB Output is correct
13 Correct 105 ms 42412 KB Output is correct
14 Correct 76 ms 24508 KB Output is correct
15 Correct 246 ms 36512 KB Output is correct
16 Correct 247 ms 30036 KB Output is correct
17 Correct 240 ms 44112 KB Output is correct
18 Correct 244 ms 38912 KB Output is correct
19 Correct 182 ms 20820 KB Output is correct
20 Correct 211 ms 20736 KB Output is correct
21 Correct 184 ms 20952 KB Output is correct
22 Correct 175 ms 20748 KB Output is correct
23 Correct 182 ms 20960 KB Output is correct
24 Correct 180 ms 20616 KB Output is correct
25 Correct 178 ms 20820 KB Output is correct
26 Correct 176 ms 20524 KB Output is correct
27 Correct 2 ms 6748 KB Output is correct
28 Correct 2 ms 7004 KB Output is correct
29 Correct 2 ms 6780 KB Output is correct
30 Correct 2 ms 6752 KB Output is correct
31 Correct 2 ms 6788 KB Output is correct
32 Incorrect 2 ms 6744 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 331 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -