Submission #580898

#	Time	Username	Problem	Language	Result	Execution time	Memory
580898		web	Sure Bet (CEOI17_sure)	C++17	0 / 100	1 ms	296 KiB

sure

#include <bitset>
#include <unordered_map>
#include <unordered_set>
#include <map>
#include <algorithm>
#include <string>
#include <set>
#include <vector>
#include <iostream>
using namespace std;

void output(double p1, double p2)
{
    if(p1 < 0 ||p2<0)
         printf("%.4lf", (double)(0));
    else
        printf("%.4lf", (double)(min(p1, p2)));
}
int main()
{
    int n; cin>>n;
    vector<double> odds1(n), odds2(n);
    for(int i = 0; i<n; ++i)
    {
        cin>>odds1[i]>>odds2[i];
    }
    sort(odds1.rbegin(), odds1.rend());
    sort(odds2.rbegin(), odds2.rend());
    int currInvested = 0;
    auto odd1It = odds1.rbegin()+1;
    auto odd2It = odds2.rbegin()+1;
    double profit1 = odds1[0]-2;
    double profit2 = odds2[0]-2;
    while(true)
    {
        if(odd1It == odds1.rend()|| odd2It == odds2.rend())
            break;
        //advance both until it is no longer locally optimal
        if(profit1-2 + *(odd1It) >= profit1 && profit2 -2 + *(odd2It) >= profit2)
        {
            profit1 += -2 + *(odd1It);
            profit2 += -2 + *(odd2It);
            odd1It++; odd2It++;
        }
        else
        {
            break;
        }
    }
  //  cout<<"zwischnerg. : "<<profit1<<" "<<profit2<<endl;
        //only advance one
    if(profit1 > profit2)
    {
        if(odd2It == odds2.rend())
        {
            output(profit1, profit2);
           
            return 0;
        }
        //advance second
        while(profit1 -1 >= profit2 )
        {
            profit1--;
            profit2 += *(odd2It)-1;
            odd2It++;
            if(odd2It == odds2.rend())
            {
                output(profit1, profit2);
                return 0;
            }
        }
    }
    else
    {
        if(odd1It == odds1.rend())
        {
           output(profit1, profit2);
            return 0;
        }
            //advance first
        while(profit2 -1 >= profit1  )
        {
            profit2--;
            profit1 += *(odd1It)-1;
            odd1It++;
            if(odd1It == odds1.rend())
            {
                output(profit1, profit2);
                return 0;
            }
        }
    }
    output(profit1, profit2);
    return 0;
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:29:9: warning: unused variable 'currInvested' [-Wunused-variable]
   29 |     int currInvested = 0;
      |         ^~~~~~~~~~~~

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