【POJ】【2151】Check the difficulty of problems
概率DP
kuangbin总结中的第8题
一开始题目看错导致想转移方程想错了……想成f[i][j]表示前 i 个队伍中最多的做出来 j 道题的概率……sigh
看了下题解……其实是对于每个队伍 i 单独考虑做出来 j 道题的概率!!最后再根据情况将t个队伍合并起来……
WA:又忘了POJ上double输出应该用%f了……so sad
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" alt="" />
//POJ 2151
#include<cmath>
#include<vector>
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<iostream>
#include<algorithm>
#define rep(i,n) for(int i=0;i<n;++i)
#define F(i,j,n) for(int i=j;i<=n;++i)
#define D(i,j,n) for(int i=j;i>=n;--i)
#define pb push_back
using namespace std;
int getint(){
int v=,sign=; char ch=getchar();
while(!isdigit(ch)) {if(ch=='-') sign=-; ch=getchar();}
while(isdigit(ch)) {v=v*+ch-''; ch=getchar();}
return v*sign;
}
const int N=,INF=~0u>>;
/*******************template********************/
double p[N][],f[N][][],s[N][];
int main(){
int n,m,t;
while(scanf("%d%d%d",&m,&t,&n)!=EOF && m){
F(i,,t) F(j,,m) scanf("%lf",&p[i][j]); F(i,,t){
f[i][][]=1.0;
F(j,,m)
f[i][j][]=f[i][j-][]*(-p[i][j]);
F(j,,m) F(k,,j)
f[i][j][k]=f[i][j-][k-]*p[i][j]+f[i][j-][k]*(-p[i][j]);
s[i][]=f[i][m][];
F(k,,m) s[i][k]=s[i][k-]+f[i][m][k];
}
double p1=,p2=;
F(i,,t){
p1*=(-s[i][]);
p2*=(s[i][n-]-s[i][]);
}
printf("%.3f\n",p1-p2);
}
return ;
}
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