10394.cpp

#include <bits/stdc++.h>

int const max = 18410011;
int const min = 100001;
int a[max];
long long b[min];

int main() {
    int i, j, n;
    for (i = 3; i <= max; i++) {
        a[i] = 1;
    }
    for (i = 2; i <= max; i += 2) a[i] = 0;
    for (i = 3; i * i <= max; i += 2) {
        if (a[i] == 1)
            for (j = i * i; j <= max; j += i) a[j] = 0;
    }
    for (i = 3; i < 18410000; i += 2) {
        if (a[i] == 1 && a[i + 2] != 1) a[i] = 0;
    }
    j = 1;
    for (i = 3; i < 18410000; i += 2) {
        if (a[i] == 1) {
            b[j] = i;
            j++;
        }
    }
    while (scanf("%d", &n) == 1) {
        printf("(%lld, %lld)\n", b[n], b[n] + 2);
    }
    return 0;
}