제출 #1137390

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1137390		gyg	Detecting Molecules (IOI16_molecules)	C++20	100 / 100	877 ms	17644 KiB

molecules

#include "molecules.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 = 2e5 + 5;

int l, u, n;
arr<pii, N> a;

set<pii> ans;
set<pii> st;
int chck(int sz) {
    st.clear();
    int sm = 0;
    for (int i = 1; i <= sz; i++)
        sm += a[i].fir, st.insert(a[i]);
    if (l <= sm && sm <= u) { ans = st; return 1; }
    if (u < sm) return 2;

    for (int i = n - sz + 1; i <= n; i++) {
        if (st.count(a[i])) continue;
        sm -= st.begin()->fir, st.erase(st.begin());
        sm += a[i].fir, st.insert(a[i]);
        if (l <= sm && sm <= u) { ans = st; return 1; }
    }
    return 3;
}

void srch() {
    int lw = 1, hg = n;
    while (lw <= hg) {
        int md = (lw + hg) / 2;
        int rsp = chck(md);
        if (rsp == 1) break;
        else if (rsp == 2) hg = md - 1;
        else lw = md + 1;
    }
}

vec<signed> find_subset(signed _l, signed _u, vec<signed> _a) {
    l = _l, u = _u, n = _a.size();
    for (int i = 1; i <= n; i++) a[i] = {_a[i - 1], i};
    sort(a.begin() + 1, a.begin() + n + 1);

    srch();   
        
    vec<signed> rt;
    for (pii x : ans) rt.push_back(x.sec - 1);
    return rt;
    // 0-indexed
}

컴파일 시 표준 에러 (stderr) 메시지

molecules.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
molecules_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31