uva10038.c

uva10038.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    int N;
    while (scanf("%d", &N) != EOF) {
        int data[N];
        
        int i;
        for (i=0; i<N; i++)
            scanf("%d", &data[i]);
        
        int check[N+1];
        memset(check, 0, sizeof(check));
        
        for (i=0; i<N-1; i++)
            if (abs(data[i+1] - data[i]) < N)
                check[abs(data[i+1] - data[i])] = 1;
        
        int flag = 1;
        for (i=1; i<N; i++) {
            if (check[i] == 0) {
                flag = 0;
                break;
            }
        }
        
        if (flag == 1)
            printf("Jolly\n");
        else
            printf("Not jolly\n");
    }
    
    return 0;
}