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CPP0108-so-tang-giam.cpp
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CPP0108-so-tang-giam.cpp
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#include <bits/stdc++.h>
#define ll long long
#define endl '\n'
#define chk cout << "<< * checked * >>" << endl;
#define db cout << '<' << "i" << '=' << i << '>' << endl
using namespace std;
int checkPrime(int n){
if(n <= 1) return 0;
if(n == 2 || n == 3) return 1;
if(n%2 == 0 || n%3 == 0) return 0;
for(int i=2; i<=sqrt(n); i++) if (n%i==0) return 0;
return 1;
}
int checkUp(int n){
int tmp = n%10;
n/=10;
while(n > 0){
if(tmp <= n%10) return 0;
tmp = n%10;
n /= 10;
}
return 1;
}
int checkDown(int n){
int tmp = n%10;
n/=10;
while(n > 0){
if(tmp >= n%10) return 0;
tmp = n%10;
n /= 10;
}
return 1;
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(NULL);
cout.tie(NULL);
int t;
cin >> t;
while(t--){
int n, cnt = 0;
cin >> n;
for(int i=pow(10, n-1); i<pow(10, n); i++){
if(checkUp(i)==1 || checkDown(i)==1){
if(checkPrime(i)) cnt++;
}
}
cout << cnt << endl;
}
}