Submission #492132

#	Time	Username	Problem	Language	Result	Execution time	Memory
492132		Biaz	Sure Bet (CEOI17_sure)	C++17	20 / 100	2073 ms	332 KiB

sure

#include <bits/stdc++.h>
#define int long long
//#define double long double
#define Nanase_Kurumi_aka_menhera_chan_is_mine ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pb push_back
#define pi pair<double,int>
#define ALL(i) i.begin(),i.end()
#define gcd(i,j) __gcd(i,j)
#define fi first
#define se second
#define eps 0.00000001
#define ist insert
#define DNE nullptr
//#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math")
//#pragma GCC optimize("O2")
int max(int x,int y){return x>=y?x:y;}
int min(int x,int y){return x>=y?y:x;}
using namespace std;
typedef int ll;
const int N=100005;
const int M=1000005;
const int MOD=1000000007;//998244353;
const int INF=1000000000000000000;//2147483647;

double a[N],b[N];
double dp[N][4][3]; // 1 a 2 b 3 ab
pi c[2*N];
int n;
double ans=0;
vector<int> vc;
void check(){
    double cnt=0,c[2]={0};
    for (int i=0;i<n;i++){
        if (vc[i]==1){
            cnt++;
            c[0]+=a[i];
        }
        if (vc[i]==2){
            cnt++;
            c[1]+=b[i];
        }
        if (vc[i]==3){
            cnt+=2;
            c[0]+=a[i];
            c[1]+=b[i];
        }
    }
    ans=max(ans,min(c[1],c[0])-cnt);
}
void dfs(int i){
    if (i==n){
        check();
        return;
    }
    vc.pb(0);dfs(i+1);vc.pop_back();
    vc.pb(1);dfs(i+1);vc.pop_back();
    vc.pb(2);dfs(i+1);vc.pop_back();
    vc.pb(3);dfs(i+1);vc.pop_back();
}
inline void sol(){
    cin >>n;
    for (int i=0;i<n;i++){
        cin >>a[i]>>b[i];
    }
    dfs(0);
    cout <<fixed<<setprecision(4)<<ans<<'\n';
}
/*
4
1.4 3.7
1.2 2
1.6 1.4
1.9 1.5
*/
signed main(){
    Nanase_Kurumi_aka_menhera_chan_is_mine
    int _=1;
    //cin >>_;
    while (_--) sol();
    return 0;
}

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