Submission #973540

#	Time	Username	Problem	Language	Result	Execution time	Memory
973540		berr	Self Study (JOI22_ho_t2)	C++17	100 / 100	221 ms	11604 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
 
 
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
 
    int n, m; cin >> n >> m;
    vector<int> a(n), b(n);

    for(auto &i: a) cin >> i;
    for(auto &i: b) cin >> i;

    auto check=[&](int x){
        int bos=0;
        for(int i=0; i<n; i++){
            if(a[i]<=b[i]){
                bos+=m;
                bos-=(x+b[i]-1)/b[i];
            }
            else{
                if(m*a[i]>=x){
                    bos+=m-(x+a[i]-1)/a[i];
                }
                else{
                    bos-=(x-m*a[i]+b[i]-1)/b[i];
                }
            }
            if(-bos > (n-i)*m) return 0LL;
        }
        if(bos < 0) return 0LL;
        return 1LL;
    };
    int s=0;

    for(int i=60; i>=0; i--){
        int tmp = s+(1LL<<i);
       // cout<<tmp<<"\n";
        if(check(tmp)) s=tmp;
    }

    cout<<s;
}

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