Submission #978758

#	Time	Username	Problem	Language	Result	Execution time	Memory
978758		DobromirAngelov	Self Study (JOI22_ho_t2)	C++14	100 / 100	196 ms	5152 KiB

Main

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

using namespace std;

const int MAXN=3e5+5;
const long long INF=1LL<<60;

int n,m;
long long a[MAXN];
long long b[MAXN];

bool check(long long val)
{
    long long s=0;
    bool fl=0;
    for(int i=1;i<=n;i++)
    {
        long long cur=0;
        if(a[i]*m>=val) cur+=(val+a[i]-1)/a[i];
        else cur+=m+(val-a[i]*m+b[i]-1)/b[i];
        s+=cur;
        if(s>1LL*n*m) return 0;
    }
    //if(fl && s<=n) cout<<1/0<<endl;
    if(s>1LL*n*m) return 0;
    return 1;
}

int main()
{
ios::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);

cin>>n>>m;
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]);

long long l=1,r=INF;
while(l<r)
{
    long long mid=(l+r+1)/2;
    if(check(mid)) l=mid;
    else r=mid-1;
}

cout<<l<<endl;

return 0;
}

Compilation message (stderr)

Main.cpp: In function 'bool check(long long int)':
Main.cpp:16:10: warning: unused variable 'fl' [-Wunused-variable]
   16 |     bool fl=0;
      |          ^~

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