Submission #1167203

#	Time	Username	Problem	Language	Result	Execution time	Memory
1167203		hainam2k9	Self Study (JOI22_ho_t2)	C++20	100 / 100	199 ms	6376 KiB

Main

#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb emplace_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
#define mp make_pair
using namespace std;
const int MOD = 1e9+7, MAXN = 3e5+5;
const string NAME = "";
int n,m,cnt[MAXN];
ll a[MAXN];
pair<int,int> p[MAXN];
bool check(ll x){
    ll sum=0;
    for(int i = 1; i<=n; ++i){
        if(p[i].fi>p[i].se){
            a[i]=min((x-1)/p[i].fi+1,1ll*m)*p[i].fi;
            cnt[i]=m-min((x-1)/p[i].fi+1,1ll*m), sum+=cnt[i];
        }else sum+=m, cnt[i]=0;
    }
    for(int i = 1; i<=n; ++i)
        if(a[i]<x){
            ll need=(x-a[i]-1)/p[i].se+1;
            if(sum-cnt[i]<need) return 0;
            sum-=need;
        }
    return 1;
}
ll bs(ll l, ll r){
    ll rs=1;
    while(l<=r){
        ll mid=(l+r)>>1;
        if(check(mid)) rs=mid, l=mid+1;
        else r=mid-1;
    }
    return rs;
}
int main()
{
    tt;
    if(fopen((NAME + ".INP").c_str(), "r")) fo;
    cin >> n >> m;
    for(int i = 1; i<=n; ++i)
        cin >> p[i].fi;
    for(int i = 1; i<=n; ++i)
        cin >> p[i].se;
    cout << bs(1,1e18);
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:53:45: note: in expansion of macro 'fo'
   53 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
Main.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:53:45: note: in expansion of macro 'fo'
   53 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~

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