#include<stdio.h>
int main() {
    int n;
    if (scanf("%d", &n) != 1 || n <= 0) {
        return 0;
    }
    int queue[1005];
    for(int = 0; i < n; i++) {
        scanf("%d", &queue[i]);
    }
    for (int i = 0; i < n; i++) {
        printf("%d", queue[i]);
    }
    return 0;
}