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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#825493 | #9778. Brotato | ucup-team1134# | WA | 1281ms | 198024kb | C++23 | 3.0kb | 2024-12-21 19:46:09 | 2024-12-21 19:46:14 |
Judging History
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;
}
Details
Tip: Click on the bar to expand more detailed information
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'