Submission #1083576

#	Time	Username	Problem	Language	Result	Execution time	Memory
1083576		HuyAT	Self Study (JOI22_ho_t2)	C++14	100 / 100	108 ms	11344 KiB

Main

#include<bits/stdc++.h>
#define newl '\n'

const int N = 3e5 + 10;
const int V = 1e9 + 10;
const long long INF = 1e18;
const long long M = 1e9 + 7;

long long a[N + 1],b[N + 1],n,m;

void readData(){
    std::cin >> n >> m;
    for(int i = 1;i <= n;++i){
        std::cin >> a[i];
    }
    for(int i = 1;i <= n;++i){
        std::cin >> b[i];
        a[i] = std::max(a[i],b[i]);
    }
}
bool f(long long mid){
    long long s = 0;
    for(int i = 1;i <= n;++i){
        long long t = std::min(m,((mid - 1)) / a[i] + 1);
        s += t;
        if(a[i] * t < mid){
            s += ((mid - a[i] * t - 1) / b[i] + 1);
        }
        if(s > m * n){
            return false;
        }
    }
    return true;
}
long long solve(){
    long long lo = 0,hi = 1e18,ans = 0;
    while(lo <= hi){
        long long mid = (lo + hi) / 2;
        if(f(mid)){
            ans = mid;
            lo = mid + 1;
        }else{
            hi = mid - 1;
        }
    }
    return ans;
}
int main(){
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);std::cout.tie(nullptr);
    readData();
    std::cout << solve();
    return 0;
}

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