Submission #753797

#	Time	Username	Problem	Language	Result	Execution time	Memory
753797		bgnbvnbv	Self Study (JOI22_ho_t2)	C++14	100 / 100	306 ms	11340 KiB

Main

#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<int,int>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=3e5+10;
const ll inf=1e18;
const ll mod=1e9+7;
ll a[maxN],b[maxN];
ll n,m;
bool check(ll mid)
{
    ll sum=0;
    for(int i=1;i<=n;i++)
    {
        ll cc=max(a[i],b[i]);
        cc=(mid+cc-1)/cc;
        if(cc<=m) sum+=m-cc;
        else
        {
            cc=max(a[i],b[i]);
            ll can=mid-cc*m;
            can=(can+b[i]-1)/b[i];
            sum-=can;
            if(sum<-m*n) return false;
        }
        // cc*...>=mid
    }
    return sum>=0;
}
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
#define rand rd
void solve()
{

        cin >> n >> m;
        for(int i=1;i<=n;i++)
        {

            cin >> a[i];
        }
        for(int i=1;i<=n;i++)
        {
            cin >> b[i];
        }

        ll low=0,high=5e18;
        ll ans=inf;
        for(int i=1;i<=n;i++)
        {
            ans=min(ans,max(a[i],b[i]));
        }
        while(low<=high)
        {
            ll mid=low+high>>1;
            if(check(mid)) low=mid+1;
            else high=mid-1;
        }
        cout << high;


}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:59:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   59 |             ll mid=low+high>>1;
      |                    ~~~^~~~~

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