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#include<iostream>
#include<cmath>
#include<algorithm>
#include<string>
#include<map>
using namespace std;
int main() {
int n;
while (cin >> n) {
if (n == 1) {
cout << "no" << endl;
continue;
}
int index = 1;
for (int i = 2;i <= sqrt(n);i++) {
if (n % i == 0) {
index = 0;
cout << "no" << endl;
break;
}
}
if (index == 1) {
&...
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