Cod sursa(job #2301296)
Utilizator | Ben Test BRIOI19 | Data | 12 decembrie 2018 20:14:41 |
---|---|---|---|
Problema | Cifre | Scor | 70 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.65 kb |
#include <bits/stdc++.h>
using namespace std;
const int N = 80000;
int checker(int check,int c){
int ans = 0;
do{
if(check%10 == c){
ans++;
}
check/=10;
}while(check);
return ans;
}
int main() {
freopen("cifre.in","r",stdin);
freopen("cifre.out","w",stdout);
int a,b,c,k,check,count = 0;
scanf("%d%d%d%d",&a,&b,&c,&k);
srand(time(NULL));
for(int i=1;i<=N;i++){
check = a+rand()%(b-a+1);
if(checker(check,c)>=k){
count++;
}
}
printf("%.4f\n",double(count)/N);
}