NC14734 比赛(二进制枚举||概率dp)
比赛
https://ac.nowcoder.com/acm/problem/14734
题意:
题解:
AC代码
/* Author:zzugzx Lang:C++ Blog:blog.csdn.net/qq_43756519 */ #include<bits/stdc++.h> using namespace std; #define fi first #define se second #define pb push_back #define mp make_pair #define all(x) (x).begin(),(x).end() #define endl '\n' typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; const int mod=1e9+7; //const int mod=998244353; const double eps = 1e-10; const double pi=acos(-1.0); const int maxn=1e6+10; const ll inf=0x3f3f3f3f; const int dir[4][2]={{0,1},{1,0},{0,-1},{-1,0}}; double a[20],b[20],c[30],d[20]; double dp[20][20]; int main() { //ios::sync_with_stdio(false); //cin.tie(0);cout.tie(0); //freopen("in.txt","r",stdin); //freopen("out.txt","w",stdout); for(int i=1;i<=12;i++)cin>>a[i]; for(int i=1;i<=12;i++)cin>>b[i]; for(int i=1;i<=12;i++)cin>>c[i]; for(int i=1;i<=12;i++)d[i]=a[i]+(1-a[i])*(b[i]+c[i]-b[i]*c[i]); dp[0][0]=1; for(int i=1;i<=12;i++) for(int j=0;j<=i;j++){ dp[i][j]=dp[i-1][j-1]*d[i]+(1-d[i])*dp[i-1][j]; } for(int i=0;i<=12;i++) printf("%.6f\n",dp[12][i]); return 0; }
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