제출 #1283098

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1283098		vibeduck	Self Study (JOI22_ho_t2)	C++20	62 / 100	118 ms	4936 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define pf push_front
#define mp make_pair
#define fi first
#define se second
#define int long long
#define all(x) (x).begin(), (x).end()

typedef long double ld;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<bool>> vvb;
typedef vector<vector<ll>> vvll;
typedef vector<string> vs;
typedef vector<vector<string>> vvs;
typedef vector<char> vc;
typedef vector<vector<char>> vvc;
typedef map<int, int> mii;
typedef unordered_map<int, int> umii;

const int mod = 1e9 + 7;
const int inf = INTMAX_MAX;
const bool tc = false;

struct x {
    int a, b;
    bool operator<(const x &other) const {
        return max(a, b) > max(other.a, other.b);
    }
};

bool ok(vector<x> &v, long long val, long long m) {
    long long bal = 0;
    for (int i = 0; i < (int)v.size(); i++) {
        long long a = v[i].a, b = v[i].b;
        long long c = max(a, b);
        long long ops = (val + c - 1) / c;
        if (ops <= m) {
            bal += (m - ops);
            continue;
        }
        long long todo = val - c * m;     
        long long need = (todo + b - 1) / b;

        if (bal < need) return false;
        bal -= need;
    }
    return true;
}


inline void solve() {
    int n, m; cin >> n >> m;
    vector<x> v(n);
    for (int i = 0; i < n; i++) cin >> v[i].a;
    for (int i = 0; i < n; i++) cin >> v[i].b;
    sort(all(v));

    int lo = 0;
    int hi = 1e18;
    while (hi > lo + 1) {
        int mid = (lo + hi) / 2;
        if (ok(v, mid, m)) lo = mid;
        else hi = mid;
    }
    cout << lo << '\n';
}

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

signed main() {
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    //setIO();

    int t = 1;
    if (tc) {
        cin >> t;
    }

    while (t--) {
        solve();
    }
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:78:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:79:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 9