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답안 #1027363

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1027363 2024-07-19T04:13:28 Z vjudge1 Sure Bet (CEOI17_sure) C++17
100 / 100
 179 ms 2792 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("Ofast,O3,unroll-loops")
#define ll long long
#define fi first
#define se second
#define ii pair<ll,ll>
#define pb push_back
using namespace std;
const ll N=2e5+5;
const long long mod=1e9+7;
const double esp=1e-8;
double a[N],b[N];
ll vta,vtb,i,j,n;
bool kt(double k)
{
    for(ll i=1;i<=n;i++)
    if(a[i]>=k)
    {
    ll l=1,r=n,vt;
    while(l<=r)
    {
        ll mid=(l+r)/2;
        if(b[mid]-i>=k)
        {
            r=mid-1;
         if(a[i]-mid>=k)
            return 1;
        }
        else l=mid+1;
    }
    }
    return 0;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    cin>>n;
    for(i=1;i<=n;i++){
        cin>>a[i]>>b[i];
    }
    sort(a+1,a+n+1,greater<double>());
    sort(b+1,b+n+1,greater<double>());
    a[1]-=1;
    b[1]-=1;
    for(i=2;i<=n;i++)
    {
        a[i]+=a[i-1]-1;
        b[i]+=b[i-1]-1;
    }
    //return cout<<kt(0.5),0;
    double l=0,r=1e8,kq=0;
    while(l<=r-esp)
    {
        double mid=(l+r)/2;
       // cout<<l<<" "<<r<<" "<<mid<<'\n';
        if(kt(mid))
        {
            kq=mid;
            l=mid+esp;
        }
        else r=mid-esp;
    }
cout<<setprecision(4)<<fixed<<kq;
}
/*
5
1.5 2.5
2.5 1.5
1.8 2.2
1.6 2.1
2.5 1.4

*/

Compilation message

sure.cpp: In function 'bool kt(double)':
sure.cpp:19:16: warning: unused variable 'vt' [-Wunused-variable]
   19 |     ll l=1,r=n,vt;
      |                ^~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 153 ms 2792 KB Output is correct
18 Correct 179 ms 2648 KB Output is correct
19 Correct 141 ms 2652 KB Output is correct
20 Correct 140 ms 2652 KB Output is correct
21 Correct 54 ms 2652 KB Output is correct
22 Correct 141 ms 2784 KB Output is correct
23 Correct 168 ms 2652 KB Output is correct
24 Correct 138 ms 2652 KB Output is correct
25 Correct 126 ms 2648 KB Output is correct
26 Correct 71 ms 2652 KB Output is correct