Submission #1157044

#	Time	Username	Problem	Language	Result	Execution time	Memory
1157044		dosts	Self Study (JOI22_ho_t2)	C++20	100 / 100	145 ms	4936 KiB

Main

#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
using namespace std;
#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define sp << " " <<    
#define all(cont) cont.begin(),cont.end()
#define vi vector<int>

const int inf = 2e18,N = 5e5+1,MOD =  998244353;

void solve() {  
    int n,m;
    cin >> n >> m;
    vi a(n+1),b(n+1);
    for (int i=1;i<=n;i++) cin >> a[i];
    for (int i=1;i<=n;i++) cin >> b[i];
    for (int i=1;i<=n;i++) a[i] = max(a[i],b[i]);
    auto check = [&](int x) -> bool {
        int tot = 0;
        for (int i=1;i<=n;i++) {
            int need = min(n*m-tot,min(m,(x+a[i]-1)/a[i]));
            tot+=need;
            tot+=max(0ll,(x-need*a[i]+b[i]-1))/b[i];
            if (tot > n*m) return false;
        }
        return true;
    };
    int l = 0;
    int r = inf;
    while (l<=r) {
        int x = (l+r) >> 1;
        if (check(x)) l = x+1;
        else r = x-1;
    }
    cout << r << '\n';
}


int32_t main() { 
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    #ifdef Dodi 
        freopen("in.txt","r",stdin);
        freopen("out.txt","w",stdout);
    #endif
    int t = 1;
    //cin >> t;
    while (t --> 0) solve();
}

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