Submission #1003997

#	Time	Username	Problem	Language	Result	Execution time	Memory
1003997		CSQ31	Self Study (JOI22_ho_t2)	C++17	62 / 100	162 ms	12836 KiB

Main

#pragma GCC optimize("Ofast") 
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
#define lb lower_bound
#define ub upper_bound
#define owo ios_base::sync_with_stdio(0);cin.tie(0);
#define debug(...) fprintf(stderr, __VA_ARGS__),fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false);\
debug("%s time : %.4fs\n", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))
typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> PII;
typedef pair<int,int> pii;
typedef vector<vector<int>> vii;
typedef vector<vector<ll>> VII;
ll gcd(ll a,ll b){if(!b)return a;else return gcd(b,a%b);}
int main()
{
    owo
    ll n,m;
    cin>>n>>m;
    vector<ll>a(n),b(n);
    for(int i=0;i<n;i++)cin>>a[i];
    for(int i=0;i<n;i++)cin>>b[i];
    ll l = 0,r = 1e16;
    while(r>=l){
        ll mid = (l+r)/2;
        bool ok = 1;
        ll f = 0;
        vector<ll>cnt(n,0);
        for(int i=0;i<n;i++){
            if(a[i]<=b[i]){
                f += m;
                continue;
            }
            cnt[i] = (mid+a[i]-1)/a[i];
            cnt[i] = min(cnt[i],m); 
            f += m-cnt[i];
        }
        for(int i=0;i<n;i++){
            ll tmp = mid - cnt[i]*a[i];
            if(tmp<=0)continue;
            if((tmp+b[i]-1)/b[i] <= f){
                f -= (tmp+b[i]-1)/b[i];
            }else{
                ok = 0;
                break;
            }
        }
        if(ok)l = mid+1;
        else r = mid-1;
    }
    cout<<r<<'\n';

}

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