Submission #246457

#	Time	Username	Problem	Language	Result	Execution time	Memory
246457		uacoder123	Sure Bet (CEOI17_sure)	C++14	20 / 100	7 ms	384 KiB

sure

 #include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define FOR(i,a,b) for (auto i = (a); i <= (b); ++i)
#define NFOR(i,a,b) for(auto i = (a); i >= (b); --i)
#define all(x) (x).begin(), (x).end()
#define sz(x) int(x.size())
#define mp(i,a) make_pair(i,a)
#define pb(a) push_back(a)
#define bit(x,b) (x&(1LL<<b))
 
typedef long long int lli;
typedef pair <lli,lli> ii;
typedef pair <lli,ii> iii;
typedef vector <lli> vi;

int main()
{
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int test=1;
  for(;test>0;--test)
  {
    lli n;
    float ans=0;
    cin>>n;
    int k=-1;
    vector<float> f(n),s(n);
    for(int i=0;i<n;++i)
      cin>>f[i]>>s[i];
    sort(all(f),greater<float>());
    sort(all(s),greater<float>());
    if(k==-1&&s[0]<1)
        k=0;
    for(int i=1;i<n;++i)
    {
      if(k==-1&&s[i]<1)
        k=i;
      f[i]=f[i]+f[i-1];
      s[i]=s[i]+s[i-1];
    }
    if(k==-1)
        k=n-1;
    for(int i=0;i<n;++i)
    {
      lli j=lower_bound(all(s),f[i])-s.begin();
      ans=max(ans,min(f[i]-i-1-min(n-1,j)-1,s[min(j,n-1)]-i-1-min(j,n-1)-1));
      j=min(j-1,k*1LL);
      ans=max(ans,min(f[i]-i-1-j-1,s[j]-i-1-j-1));
    }
    cout<<fixed<<setprecision(4)<<ans<<endl;
  }
  return(0);
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40