Submission #534077

#	Time	Username	Problem	Language	Result	Execution time	Memory
534077		balbit	Self Study (JOI22_ho_t2)	C++14	100 / 100	765 ms	11560 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define pii pair<int, int>
#define f first
#define s second

#define REP(i,n) for (int i = 0; i<n; ++i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)

#define SZ(x) (int)((x).size())
#define ALL(x) (x).begin(), (x).end()
#define pb push_back

#define MX(a,b) a = max(a,b)
#define MN(a,b) a = min(a,b)

#ifdef BALBIT
#define bug(...) cerr<<"#"<<__LINE__<<" "<<#__VA_ARGS__<<" - ", _do(__VA_ARGS__)
template <typename T> void _do( T && x) {cerr<<x<<endl;}
template <typename T, typename ...S> void _do( T && x, S && ...y) {cerr<<x<<", "; _do(y...);}
#else
#define bug(...)
#define endl '\n'
#endif // BALBIT

const int maxn = 3e5+5;

ll a[maxn], b[maxn];
int n,m;
bool can(ll X) {
    __int128 pool = 0;
    REP(i,n) {

        ll keep = min(X / a[i], m);
        ll need = (X - a[i] * keep + b[i]-1) / b[i];

        ll g1 = m-keep-need;
        keep = min((X+a[i]-1) / a[i], m);
        need = (max(0ll, X - a[i] * keep) + b[i]-1) / b[i];
        ll g2 = m-keep-need;
        pool += max(g1, g2);
        bug(i, g1, g2);
    }

    bug(X, pool);
    return pool >= 0;
}

signed main(){
    ios::sync_with_stdio(0), cin.tie(0);

    bug(1,2);
    cin>>n>>m;

    REP(i,n) cin>>a[i];
    REP(i,n) cin>>b[i], MX(a[i], b[i]);

    ll l = 0, r = 4e18;
    while (l!=r) {
        ll mid = (l+r)/2;
        if (can(mid)) {
            l = mid+1;
        }else{
            r = mid;
        }
    }
    cout<<l-1<<endl;
}

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