Submission #798366

#	Time	Username	Problem	Language	Result	Execution time	Memory
798366		n3rm1n	Self Study (JOI22_ho_t2)	C++17	62 / 100	202 ms	16092 KiB

Main

#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const long long  MAXN = 3e5 + 10;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
long long  n, m;
long long  a[MAXN], b[MAXN];
void read()
{
    cin >> n >> m;
    for (long long  i = 1; i <= n; ++ i)
        cin >> a[i];
    for (long long  i = 1; i <= n; ++ i)
        cin >> b[i];
}
long long  useda[MAXN], needb[MAXN];
bool check(long long  x)
{
    memset(useda, 0, sizeof(useda));
    memset(needb, 0, sizeof(needb));
    long long  suma = 0, sumb = 0;
    for (long long  i = 1; i <= n; ++ i)
    {
        if(a[i] > b[i])
        {
            long long  times = x / a[i];
            if(x % a[i] != 0)times ++;
            times = min(m, times);
            useda[i] = times;
            long long  ost = max(1LL * 0, x - times * a[i]);
            needb[i] = ost / b[i];
            if(ost % b[i] != 0)needb[i] ++;
        }
        else
        {
            needb[i] = x / b[i];
            if(x % b[i] != 0)needb[i] ++;
        }
        suma += useda[i];
        sumb += needb[i];
        if(suma + sumb > n * m)return false;
    }

    return (sumb <= n * m - suma);
}
void solve()
{
    long long  l = 0, r = 1e17, mid, ans = 0;
    while(l <= r)
    {
        mid = (l + r)/2;
        if(check(mid))
        {
            ans = mid;
            l = mid + 1LL * 1;
        }
        else r = mid - 1LL * 1;
    }
    cout << ans << endl;
}
int main()
{
    speed();

    read();
    solve();
    return 0;
}

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