Submission #576238

#	Time	Username	Problem	Language	Result	Execution time	Memory
576238		Aldas25	Self Study (JOI22_ho_t2)	C++14	0 / 100	321 ms	5112 KiB

Main

/*
//#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
*/

#include <bits/stdc++.h>

using namespace std;

#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr)
#define FOR(i, a, b) for(int i = (a); i <= (b); i++)
#define REP(n) FOR(O, 1, (n))
#define pb push_back
#define f first
#define s second
typedef long double ld;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vii;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int MAXN = 500100, MAXK = 20;
const ll INF = 1e14;
//const ll MOD = 1e9+7;
const ll MOD = 998244353;

void setIO()
{
    FAST_IO;
}

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

ll n, m;
ll a[MAXN], b[MAXN];

bool check (ll x) {
    ll needLessons = 0;
    FOR(i, 1, n) {
        //ll w1 = (x + a[i] - 1) / a[i];
        //ll w2 = (x-m*a[i] + b[i] - 1) / b[i];
        if (m*a[i] >= x) needLessons -= m - (x+a[i]-1)/a[i];
        else needLessons += (x-m*a[i] + b[i] - 1) / b[i];
    }
    return needLessons <= 0;
}

int main()
{
    setIO();

    cin >> n >> m;
    FOR(i, 1, n) cin >> a[i];
    FOR(i, 1, n) cin >> b[i];
    FOR(i, 1, n) a[i] = max(a[i], b[i]);

    ll le = 0, ri = 1e18+7;
    while (le < ri) {
        ll m = (le+ri+1)/2;
        if (check(m)) le = m;
        else ri = m-1;
    }

    cout << le << "\n";

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:39:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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