Submission #1277600

#	Time	Username	Problem	Language	Result	Execution time	Memory
1277600		wedonttalkanymore	Self Study (JOI22_ho_t2)	C++20	0 / 100	55 ms	2536 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define int long long
#define pii pair<ll, ll>
#define fi first
#define se second

const ll N = 2e5 + 5, inf = 1e18, mod = 1e9 + 7, block = 320, lim = 19;

int n, m;
int a[N], b[N];

bool check(int mid) {
    __int128 sum = 0;
    __int128 total = (__int128)n * m;
    for (int i = 1; i <= n; i++) {
        int val = max(a[i], b[i]);
        __int128 need = ((__int128)mid + val - 1) / val;
        if (need <= m) {
            sum += need;
        }
        else {
            __int128 prod = (__int128)val * m;
            __int128 rem = (__int128)mid - prod;
            __int128 newneed = (rem + b[i] - 1) / b[i];
            sum += (__int128)m + newneed;
        }
        if (sum > total) return false;
    }
    return sum <= total;
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    if (fopen(".inp", "r")) {
        freopen(".inp", "r", stdin);
        freopen(".out", "w", stdout);
    }
    cin >> n >> m;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 1; i <= n; i++) cin >> b[i];
    int l = 1, r = 1e18, ans = 0;
    while(l <= r) {
        int mid = (l + r) / 2;
        if (check(mid)) {
            ans = mid;
            l = mid + 1;
        }
        else r = mid - 1;
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

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