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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#825493#9778. Brotatoucup-team1134#WA 1281ms198024kbC++233.0kb2024-12-21 19:46:092024-12-21 19:46:14

Judging History

This is the latest submission verdict.

  • [2024-12-21 19:46:14]
  • Judged
  • Verdict: WA
  • Time: 1281ms
  • Memory: 198024kb
  • [2024-12-21 19:46:09]
  • Submitted

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pair<int,int>>
#define vll vector<pair<ll,ll>>
#define vvi vector<vector<int>>
#define vvl vector<vector<ll>>
#define vvii vector<vector<pair<int,int>>>
#define vvll vector<vector<pair<ll,ll>>>
#define vst vector<string>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define mkunique(x) sort(all(x));(x).erase(unique(all(x)),(x).end())
#define fi first
#define se second
#define mp make_pair
#define si(x) int(x.size())
const int mod=998244353,MAX=300005,INF=15<<26;

#define ld long double
ld dp[MAX][123];

int main(){
    
    std::ifstream in("text.txt");
    std::cin.rdbuf(in.rdbuf());
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    ll N,K;
    ld P;cin>>N>>K>>P;
    ll pp=roundl(P*10000),qq=10000-pp,rr=10000;
    chmin(K,120LL);
    
    for(int j=0;j<=K;j++) dp[N][j]=0;
    dp[0][0]=0;
    for(int i=N-1;i>=0;i--){
        dp[0][0]+=1.0l;
        dp[0][0]/=qq;
        dp[0][0]*=rr;
    }
    for(int i=N-1;i>=1;i--){
        dp[i][0]=(dp[i+1][0]*qq+dp[0][0]*pp+rr)/rr;
    }
    //cout<<fixed<<setprecision(25)<<dp[0][0]<<endl;
    
    for(int j=1;j<=K;j++){
        for(int i=N-1;i>=0;i--){
            dp[i][j]=(ld)(dp[i+1][j]*qq+dp[i][j-1]*pp+rr)/rr;
        }
        ld l=0,r=4e12;
        for(int q=0;q<80;q++){
            ld m=(l+r)/2;
            int L=0,R=N;
            while(R-L>1){
                int M=(L+R)/2;
                if(dp[M][j-1]<m) R=M;
                else L=M;
            }
            ld s=dp[R][j];
            for(int i=L;i>=0;i--){
                s=(ld)(s*qq+m*pp+rr)/rr;
            }
            if(s>m) l=m;
            else r=m;
        }
        /*
        int L=0,R=N;
        while(R-L>1){
            int M=(L+R)/2;
        }
        ld l=0,r=1e14;
        for(int q=0;q<80;q++){
            ld m=(l+r)/2;
            int L=0,R=N;
            while(R-L>1){
                int M=(L+R)/2;
                if(dp[M][j-1]<m) R=M;
                else L=M;
            }
            for(int i=R;i>=1;i--){
                dp[i][j]=(ld)(dp[i+1][j]*qq+min(dp[i][j-1],m)*pp+rr)/rr;
            }
            ld z=(dp[1][j]*qq+m*pp+rr)/rr;
            //for(int i=0;i<=N;i++) cout<<m<<" "<<i<<" "<<dp[i][j]<<endl;
            if(z>m) l=m;
            else r=m;
        }
         */
        ld m=(l+r)/2;
        for(int i=N-1;i>=1;i--){
            dp[i][j]=(ld)(dp[i+1][j]*qq+min(dp[i][j-1],m)*pp+rr)/rr;
        }
        dp[0][j]=(l+r)/2;
        //for(int i=0;i<=N;i++) cout<<dp[i][j]<<endl;
        //cout<<fixed<<setprecision(25)<<(l+r)/2<<endl;
    }
    
    cout<<fixed<<setprecision(25)<<dp[0][K]<<endl;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3824kb

input:

5 0
0.5

output:

61.9999999999999999965305530

result:

ok found '62.000000000', expected '62.000000000', error '0.000000000'

Test #2:

score: 0
Accepted
time: 0ms
memory: 3860kb

input:

5 1
0.5

output:

46.9999999999987003278245634

result:

ok found '47.000000000', expected '47.000000000', error '0.000000000'

Test #3:

score: 0
Accepted
time: 0ms
memory: 24576kb

input:

10000 0
0.002

output:

247489700298.2537139505147933959960938

result:

ok found '247489700298.253723145', expected '247489700298.253692627', error '0.000000000'

Test #4:

score: 0
Accepted
time: 517ms
memory: 198000kb

input:

100000 10
0.0002

output:

38767507154.2616770863533020019531250

result:

ok found '38767507154.261680603', expected '38767507133.232215881', error '0.000000001'

Test #5:

score: 0
Accepted
time: 0ms
memory: 196360kb

input:

100000 0
0.0002

output:

2430683127170.3808789253234863281250000

result:

ok found '2430683127170.380859375', expected '2430683127170.376953125', error '0.000000000'

Test #6:

score: 0
Accepted
time: 896ms
memory: 197348kb

input:

100000 20
0.0002

output:

801073272.7541378317400813102722168

result:

ok found '801073272.754137874', expected '801073272.231680870', error '0.000000001'

Test #7:

score: 0
Accepted
time: 1281ms
memory: 196852kb

input:

100000 40
0.0002

output:

478148.7186412674388407140213531

result:

ok found '478148.718641267', expected '478148.718426307', error '0.000000000'

Test #8:

score: 0
Accepted
time: 170ms
memory: 198024kb

input:

99995 4
0.0001

output:

38976542.8681604880621307529509068

result:

ok found '38976542.868160486', expected '38976542.868175834', error '0.000000000'

Test #9:

score: 0
Accepted
time: 358ms
memory: 196764kb

input:

99995 10
0.0001

output:

3549184.5977115098885406041517854

result:

ok found '3549184.597711510', expected '3549184.597712017', error '0.000000000'

Test #10:

score: 0
Accepted
time: 477ms
memory: 196560kb

input:

99995 16
0.0001

output:

399507.4705566910843685946019832

result:

ok found '399507.470556691', expected '399507.470556742', error '0.000000000'

Test #11:

score: 0
Accepted
time: 312ms
memory: 197312kb

input:

99990 8
0.0001

output:

7773463.9479308058580500073730946

result:

ok found '7773463.947930806', expected '7773463.947930722', error '0.000000000'

Test #12:

score: 0
Accepted
time: 357ms
memory: 197736kb

input:

99990 10
0.0001

output:

3547428.9454723562696472072275355

result:

ok found '3547428.945472356', expected '3547428.945472297', error '0.000000000'

Test #13:

score: 0
Accepted
time: 407ms
memory: 196716kb

input:

99990 12
0.0001

output:

1647102.0204344410899466311093420

result:

ok found '1647102.020434441', expected '1647102.020434395', error '0.000000000'

Test #14:

score: -100
Wrong Answer
time: 14ms
memory: 36108kb

input:

16664 1
0.0012

output:

257920045640.2759343087673187255859375

result:

wrong answer 1st numbers differ - expected: '257920044630.8605347', found: '257920045640.2759399', error = '0.0000000'