Cod sursa(job #2301259)
Utilizator | Ben Test BRIOI19 | Data | 12 decembrie 2018 19:47:29 |
---|---|---|---|
Problema | Cifre | Scor | 0 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.58 kb |
#include <bits/stdc++.h>
using namespace std;
int main() {
freopen("cifre.in","r",stdin);
freopen("cifre.out","w",stdout);
int a,b,c,k;
scanf("%d%d%d%d",a,b,c,k);
int den = b-a+1;
srand(time(0));
int count = 0;
for(int i=1;i<=1000000;i++){
int check = a+rand()%(den);
int ans = 0;
do{
if(check%10 == c){
ans++;
}
check/=10;
}while(check);
if(ans>=k){
count++;
}
}
printf("%.4f\n",double(count)/1000000);
}