[UVa] 10038 Jolly Jumpers.cpp

#include <cstdio>
#include <cmath>
using namespace std;
int main()
{
   // freopen("input.txt","rt",stdin);
    int N;
    while (scanf("%d",&N)!=EOF){
        int s[3001],check[3001]={0};
        bool ok=1;

        scanf("%d",&s[0]);
        for (int i=1; i<N; i++) {
            scanf("%d",&s[i]);
            int temp = abs(s[i]-s[i-1]);
            if (temp<=3000) check[temp]++;
        }

        for (int i=1;i<N;i++)
            if (check[i]==0) { ok = 0; break; }

        if (ok) printf("Jolly\n");
        else printf("Not jolly\n");
    }
    return 0;
}