제출 #1140223

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1140223		gyg	Aliens (IOI16_aliens)	C++20	25 / 100	2049 ms	80816 KiB

aliens

#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define arr array
#define vec vector
#define pii pair<int, int>
#define fir first 
#define sec second 
const int N = 4e3 + 5, K = 4e3 + 5, M = 1e6 + 5, INF = 1e18, LG = 20;

int n, k;
arr<int, N> lf, rg, intr;

// Make lazy create
struct Lch {
    int evl(pii x, int y) { return x.fir * y + x.sec; }
    int nm;
    arr<pii, 2 * N * LG> ln;
    arr<int, 2 * N * LG> lf_ch, rg_ch;

    void intl() { 
        nm = 1;
        ln.fill({0, INF});
        lf_ch.fill(0), rg_ch.fill(0);
    }
    void prp(int u) {
        if (!lf_ch[u]) lf_ch[u] = ++nm, rg_ch[u] = ++nm;
    }
    void ins(pii x, int u = 1, int lw = 0, int hg = M) {
        int md = (lw + hg) / 2;
        if (evl(x, md) < evl(ln[u], md)) swap(x, ln[u]);
        if (lw == hg) return;
        prp(u);
        if (evl(x, lw) < evl(ln[u], lw)) ins(x, lf_ch[u], lw, md);
        else ins(x, rg_ch[u], md + 1, hg);
    }
    int qry(int x, int u = 1, int lw = 0, int hg = M) {
        if (lw == hg) return evl(ln[u], x);
        int md = (lw + hg) / 2;
        prp(u);
        if (x <= md) return min(evl(ln[u], x), qry(x, lf_ch[u], lw, md));
        return min(evl(ln[u], x), qry(x, rg_ch[u], md + 1, hg));
    }
} lch;

arr<arr<int, K>, N> dp;
int sq(int x) { return x * x; }
void dp_cmp() {
    lch.intl();
    for (int i = 1; i <= n; i++) 
        dp[i][1] = sq(rg[i] - lf[1] + 1);

    for (int c = 2; c <= k; c++) {
        lch.intl();
        for (int i = 1; i <= n; i++) {
            dp[i][c] = sq(rg[i]) + 2 * rg[i] + 1 + lch.qry(rg[i]);
            lch.ins({-2 * lf[i + 1], sq(lf[i + 1]) - 2 * lf[i + 1] - intr[i] + dp[i][c - 1]});
        }
    }

    // for (int i = 1; i <= n; i++)
    //     for (int c = 1; c <= k; c++) 
    //         cout << i << " " << c << ": " << dp[i][c] << endl;
}

map<int, int> rng;
int take_photos(signed _sz, signed _m, signed _k, vec<signed> _rw, vec<signed> _cl) {
    k = _k;
    for (int i = 0; i < _sz; i++)
        rng[min(_rw[i], _cl[i])] = max(rng[min(_rw[i], _cl[i])], (int) max(_rw[i], _cl[i]));
    
    int mx_rg = -1;
    vec<int> dlt;
    for (pii x : rng) {
        if (x.sec <= mx_rg) dlt.push_back(x.fir);
        else mx_rg = x.sec;
    }
    for (int x : dlt) rng.erase(x);
    while (rng.size()) {
        pii x = *rng.begin(); rng.erase(rng.begin());
        n++, lf[n] = x.fir, rg[n] = x.sec;
    }
    for (int i = 1; i <= n; i++) intr[i] = (rg[i] < lf[i + 1]) ? 0 : sq(rg[i] - lf[i + 1] + 1);

    // cout << n << endl;
    // for (int i = 1; i <= n; i++) cout << lf[i] << " " << rg[i] << endl;

    dp_cmp();

    int ans = *min_element(dp[n].begin() + 1, dp[n].begin() + k + 1);
    return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

aliens.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
aliens_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 9 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40