Submission #831116

#	Time	Username	Problem	Language	Result	Execution time	Memory
831116		jasmin	Self Study (JOI22_ho_t2)	C++17	0 / 100	80 ms	2656 KiB

Main

//JOI 2022 Final round
#include<bits/stdc++.h>
using namespace std;
#define int long long

const int INF=LLONG_MAX;

bool possible(int x, int n, int m, vector<int>& a, vector<int>& b){
    
    int d=0;
    for(int i=0; i<n; i++){

        if(a[i] > b[i]){

            int da = (x+a[i]-1)/a[i];
            int db = 0;
            
            if(da > m){
                da = m;

                int x2 = x - da*a[i];
                int db = (x2 + b[i]-1)/b[i];
            }
    
            d += da + db;
        }
        else{

            int db = (x+b[i] -1)/b[i];
            d += db;
        }

    }

    return d <= n*m;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    for(int i=0; i<n; i++){
        cin >> a[i];
    }
    vector<int> b(n);
    for(int i=0; i<n; i++){
        cin >> b[i];
    }

    int l=0; int r=INF;
    int ans=0;
    while(l<=r){
        int mi=l+(r-l)/2;

        if(possible(mi, n, m, a, b)){
            ans=mi;
            l=mi+1;
        }
        else{
            r=mi-1;
        }
    }

    cout << ans << "\n";
}

Compilation message (stderr)

Main.cpp: In function 'bool possible(long long int, long long int, long long int, std::vector<long long int>&, std::vector<long long int>&)':
Main.cpp:22:21: warning: unused variable 'db' [-Wunused-variable]
   22 |                 int db = (x2 + b[i]-1)/b[i];
      |                     ^~

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