OJ-Problems-Source/HDOJ/2949_autoAC.cpp
2016-08-24 18:27:13 +08:00

87 lines
1.8 KiB
C++

#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cmath>
#include <cctype>
#include <iostream>
#include <algorithm>
#include <functional>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <queue>
#include <stack>
using namespace std;
typedef long long LL;
typedef pair<int,int> PII;
typedef vector<int> VI;
#define PB push_back
#define MP make_pair
#define clr(a,b) (memset(a,b,sizeof(a)))
#define rep(i,a) for(int i=0; i<(int)a.size(); i++)
const int INF = 0x3f3f3f3f;
const double eps = 1E-8;
int T;
int n,l,r;
char s[200010];
int num[200010];
LL tot = 1ll*n*(n+1)/2;
double fun1(int lim)
{
double ret = 0;
int ed = 1,sum = num[1];
for(int st=1; st<=n; st++)
{
while(sum <= lim && ed < n)
{
ed ++;
sum += num[ed];
}
if(sum > lim) ret += 1.0*(n - ed + 1)/(1ll*n*(n-st+1)) ;
sum -= num[st];
}
return ret;
}
double fun2(int lim)
{
double ret = 0;
int ed = 1,sum = num[1];
for(int st=1; st<=n; st++)
{
while(sum < lim && ed < n)
{
ed ++;
sum += num[ed];
}
if(sum >= lim)
{
if(ed-1 >= st) ret += 1.0*(ed - st)/(1ll*n*(n-st+1));
}
else
{
ret += 1.0*(ed - st + 1)/(1ll*n*(n-st+1));
}
sum -= num[st];
}
return ret;
}
int main()
{
scanf("%d",&T);
while(T--)
{
scanf("%d",&n);
scanf("%s",s+1);
scanf("%d%d",&l,&r);
num[0] = 0;
for(int i=1; i<=n; i++) num[i] = s[i] - 'A';
double a,b,c;
c = fun1(r);
a = fun2(l);
b = 1 - a - c;
printf("%lf %lf %lf\n",b,a,c);
}
return 0;
}