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Submission #1027361

# Submission time Handle Problem Language Result Execution time Memory
1027361 2024-07-19T04:12:39 Z hehebjp123 Sure Bet (CEOI17_sure) C++14
60 / 100
 2000 ms 2784 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-10;
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

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 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 0 ms 2396 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 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 0 ms 2396 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 0 ms 2396 KB Output is correct
12 Correct 2 ms 2392 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 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 0 ms 2396 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 0 ms 2396 KB Output is correct
12 Correct 2 ms 2392 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 175 ms 2652 KB Output is correct
18 Correct 191 ms 2652 KB Output is correct
19 Correct 159 ms 2784 KB Output is correct
20 Correct 163 ms 2684 KB Output is correct
21 Execution timed out 2086 ms 2684 KB Time limit exceeded
22 Halted 0 ms 0 KB -