codechef/RAINBOWA at master · rahul2240/codechef · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
#include <iostream>

using namespace std;

int main()
{
    int test_cases, no_of_element_in_array, a[100000], i, flag, val, x;

    cin>>test_cases;

    while(test_cases--)
    {
        cin>>no_of_element_in_array;

        flag = 0;

        for(i = 0; i < no_of_element_in_array; i++)
        {
                cin>>a[i];
        }

        if( no_of_element_in_array%2 == 0)
            val = 0;
        else
            val = 1;

        for(i=0;i < no_of_element_in_array/2 - 1 + val; i++)
        {
            if(a[i] == a[i+1] || a[i]+1 == a[i+1])
            {
                flag = 0;
            }
            else
            {
                flag = 1;
                break;
            }
            if(a[0]!=1){
                flag = 1;
                break;
            }
        }

        if(flag!=1)
        {
            for(i=0; i < no_of_element_in_array/2 - 1 + val; i++)
            {
                if(a[i]!=a[no_of_element_in_array-1-i])
                {
                    flag = 1;
                    break;
                }
            }

        }
        if(a[no_of_element_in_array/2 - 1 + val]!=7)
                flag = 1;

            if(flag==1)
                cout<<"no"<<endl;
            else
                cout<<"yes"<<endl;

    }
    return 0;
}