SDNU 1377.Problem C: Jolly Jumpers（水题）

Posted 2022-05-21 rootvount

Description

 

Problem C: Jolly Jumpers

A sequence of n > 0 integers is called a jolly jumper if the absolute values of the difference between successive elements take on all the values 1 through n-1. For instance,

 

1 4 2 3

is a jolly jumper, because the absolutes differences are 3, 2, and 1 respectively. The definition implies that any sequence of a single integer is a jolly jumper. You are to write a program to determine whether or not each of a number of sequences is a jolly jumper.

 

Input

Each line of input contains an integer n < 3000 followed by n integers representing the sequence. 

Output

For each line of input, generate a line of output saying "Jolly" or "Not jolly".

Sample Input

4 1 4 2 3
5 1 4 2 -1 6

Sample Output

Jolly
Not jolly

Source

Waterloo local 2000.09.30

题意：n个数字，每对连续的两个数字，如果后数与前数差值的绝对值能覆盖1~（n-1）的每一个数，就输出Jolly，否则输出Not jolly

#include <cstdio>
#include <iostream>
#include <cmath>
#include <string>
#include <cstring>
#include <algorithm>
#include <queue>
#include <vector>
#include <map>
using namespace std;
#define ll long long
const int inf = 0x3f3f3f3f;
const int mod = 1e9+7;

int n, a[10000+8], buffer[10000+8];

int main()

    while(~scanf("%d", &n))
    
        int id = 0;
        for(int i = 0; i<n; i++)
        
            scanf("%d", &a[i]);
            if(i)buffer[id++] = abs(a[i]-a[i-1]);
        
        sort(buffer, buffer+id);
        bool flag = 1;
        for(int i = 0; i<id; i++)
        
            if(buffer[i] != i+1)
            
                flag = 0;
                break;
            
        
        if(flag)printf("Jolly\n");
        else printf("Not jolly\n");
    
    return 0;