Submission #548691

#	Time	Username	Problem	Language	Result	Execution time	Memory
548691		cpp219	Self Study (JOI22_ho_t2)	C++17	100 / 100	280 ms	9120 KiB

Main

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
#define debug(y) cout<<y,exit(0)
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 3e5 + 9;
const ll inf = 1e18 + 7;

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

bool chk(ll tar){
    ll spare = 0;
    for (ll i = 1;i <= n;i++){
        ll mx = max(a[i],b[i]);
        if (m*mx > tar) spare += m - ceil((ld)tar/mx);
        else spare -= ceil((ld)(tar - mx*m)/b[i]);
    }
    return (spare >= 0);
}

int main(){
    ios_base::sync_with_stdio(NULL); cin.tie(0); cout.tie(0);
    #define task "tst"
    if (fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        //freopen(task".out","w",stdout);
    }
    cin>>n>>m;
    for (ll i = 1;i <= n;i++) cin>>a[i];
    for (ll i = 1;i <= n;i++) cin>>b[i];
    ll l,mid,h; l = 1; h = inf; //debug(chk(18));
    while(l <= h){
        mid = (l + h)/2;
        if (chk(mid)) l = mid + 1;
        else h = mid - 1;
    }
    cout<<h;
}
/// be confident

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:28:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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