Cod sursa(job #2301241)
Utilizator | Ben Test BRIOI19 | Data | 12 decembrie 2018 19:34:09 |
---|---|---|---|
Problema | Cifre | Scor | 30 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.6 kb |
#include <bits/stdc++.h>
using namespace std;
int main() {
ifstream fin("cifre.in");
ofstream fout("cifre.out");
int a,b,c,k;
fin>>a>>b>>c>>k;
int den = b-a+1;
srand(time(0));
int count = 0;
for(int i=1;i<=1005000;i++){
int check = a+rand()%(den);
int ans = 0;
while(check){
if(check%10 == c){
ans++;
}
check/=10;
}
if(check%10 == c){
ans++;
}
if(ans>=k){
count++;
}
}
fout<<setprecision(4)<<(double)count/1005000;
}