oj.uz

답안 #973706

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
973706 2024-05-02T09:48:13 Z berr Let's Win the Election (JOI22_ho_t3) C++17
0 / 100
 2500 ms 2432 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 505;
 
double dp[N][N];
 
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    
    int n, k; cin >> n >> k;

    vector<array<int, 2>> a(n);
    int c=0;
    for(auto &[i, l]: a) cin >> i >> l, c+=(l!=-1);
    
    sort(a.begin(), a.end(), [&](auto x, auto y){
        if(x[1]==y[1]) return x[0] < y[0];
        else if(y[1]==-1) return true;
        else if(x[1]==-1) return false;
         return x[1]<y[1]; 
    }); 

    vector<double> val(n+1);
    vector<int> vis(n+1, 0);

        auto calc=[&](int e){
            if(vis[e]) return val[e];
            vis[e]=1;
            for(int i=0; i<=n+1; i++){
                for(int l=0; l<=n+1; l++){
                    dp[i][l]=1e9;
                }
            }
         
            dp[0][0]=0;
            for(int i=0; i<n; i++){
                for(int l=e; l>=0; l--){
                    for(int x=n; x>=0; x--){
                      //  cout<<(double)a[i][1]/(double)(l+1)<<"\n";
                        if(a[i][1]!=-1)
                            dp[l+1][x] =min<double>(dp[l+1][x], dp[l][x]+(double)a[i][1]/(double)(l+1));
                        dp[l][x+1]=min<double>(dp[l][x+1], dp[l][x]+((double)a[i][0]/(double)(e+1)));
                    }
                }
            }

            return val[e]=dp[e][k-e];

        };
        double ans=1e9;
        int s=0;

        for(int i=9; i>=0; i--){
            int tmp = s+(1<<i);
            if(tmp<=k&&tmp<=c && calc(tmp)<calc(tmp-1)){
                s=tmp;
                ans=min(ans, calc(tmp));
            }
        }
        
       

        cout<<setprecision(9)<<ans<<"\n";
    

}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1795 ms 2428 KB Output is correct
2 Correct 1927 ms 2424 KB Output is correct
3 Correct 2139 ms 2428 KB Output is correct
4 Correct 2407 ms 2432 KB Output is correct
5 Execution timed out 2533 ms 2432 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -