oj.uz

Submission #916069

# Submission time Handle Problem Language Result Execution time Memory
916069 2024-01-25T08:33:57 Z yeediot Let's Win the Election (JOI22_ho_t3) C++14
21 / 100
 268 ms 4892 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define pb push_back
#define pii pair<int,int>
#define F first
#define S second
#define all(X) X.begin(),X.end()
#define chmax(a,b) a=max(a,b)
#define chmin(a,b) a=min(a,b)
#ifdef local
void setio(){freopen("/Users/iantsai/Library/Mobile Documents/com~apple~CloudDocs/cpp/Empty.md","r",stdin);}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
bool cmp(pii a,pii b){
    if(a.S!=b.S)return a.S<b.S;
    return a.F<b.F;
}
const int inf=2e9;
signed main(){
    cout<<fixed<<setprecision(10);
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    setio();
    int n,k;
    cin>>n>>k;
    vector<pii>vec;
    vec.pb({0,0});
    for(int i=0;i<n;i++){
        int a,b;
        cin>>a>>b;
        vec.pb({a,b});
        if(b==-1){
            vec[i+1].S=inf;
        }
    }
    sort(all(vec),cmp);
    vector<vector<int>>suf(n+1,vector<int>(k+1));
    for(int i=1;i<=k;i++){
        multiset<int>st;
        int sum=0;
        for(int j=n;j>=1;j--){
            st.insert(vec[j].F);
            sum+=vec[j].F;
            if((int)(st.size())>i){
                sum-=*prev(st.end());
                st.erase(prev(st.end()));
            }
            if((int)(st.size())<i){
                suf[j][i]=inf;
            }
            else{
                suf[j][i]=sum;
            }
        }
    }
    double ans=inf;
    for(int p=0;p<=k;p++){
        vector<vector<double>>dp(n+1,vector<double>(p+1,inf));
        dp[0][0]=0;
        for(int i=1;i<=n;i++){
            for(int j=0;j<=p;j++){
                if(j)dp[i][j]=dp[i-1][j-1]+(double)vec[i].S/j;
                dp[i][j]=min(dp[i][j],dp[i-1][j]+(double)vec[i].F/(p+1));
                //cout<<i<<' '<<j<<' '<<dp[i][j]<<' '<<vec[i].F<<'\n';
                if(j==p){
                    if(i!=n)chmin(ans,dp[i][j]+(double)suf[i+1][k-i]/(p+1));
                    else chmin(ans,dp[i][j]);
                    //cout<<i<<' '<<j<<' '<<ans<<' '<<dp[i][j]<<'\n';
                }
            }
        }
        //cout<<ans<<'\n';
    }
    cout<<ans<<'\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 6 ms 952 KB Output is correct
6 Correct 18 ms 1828 KB Output is correct
7 Correct 64 ms 2864 KB Output is correct
8 Correct 139 ms 3616 KB Output is correct
9 Correct 245 ms 4716 KB Output is correct
10 Correct 120 ms 3440 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 6 ms 952 KB Output is correct
6 Correct 18 ms 1828 KB Output is correct
7 Correct 64 ms 2864 KB Output is correct
8 Correct 139 ms 3616 KB Output is correct
9 Correct 245 ms 4716 KB Output is correct
10 Correct 120 ms 3440 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 25 ms 1884 KB Output is correct
13 Correct 31 ms 1980 KB Output is correct
14 Correct 25 ms 1848 KB Output is correct
15 Correct 120 ms 3432 KB Output is correct
16 Correct 140 ms 3464 KB Output is correct
17 Correct 129 ms 3632 KB Output is correct
18 Correct 268 ms 4696 KB Output is correct
19 Correct 240 ms 4708 KB Output is correct
20 Correct 245 ms 4892 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 240 ms 4664 KB Output is correct
2 Correct 245 ms 4716 KB Output is correct
3 Correct 241 ms 4784 KB Output is correct
4 Correct 238 ms 4644 KB Output is correct
5 Correct 239 ms 4592 KB Output is correct
6 Correct 235 ms 4716 KB Output is correct
7 Correct 245 ms 4868 KB Output is correct

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 6 ms 952 KB Output is correct
6 Correct 18 ms 1828 KB Output is correct
7 Correct 64 ms 2864 KB Output is correct
8 Correct 139 ms 3616 KB Output is correct
9 Correct 245 ms 4716 KB Output is correct
10 Correct 120 ms 3440 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 25 ms 1884 KB Output is correct
13 Correct 31 ms 1980 KB Output is correct
14 Correct 25 ms 1848 KB Output is correct
15 Correct 120 ms 3432 KB Output is correct
16 Correct 140 ms 3464 KB Output is correct
17 Correct 129 ms 3632 KB Output is correct
18 Correct 268 ms 4696 KB Output is correct
19 Correct 240 ms 4708 KB Output is correct
20 Correct 245 ms 4892 KB Output is correct
21 Incorrect 0 ms 348 KB Output isn't correct
22 Halted 0 ms 0 KB -