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- #include<stdio.h>
- #include<string.h>
- int main()
- {
- int t,kase=1;
- scanf("%d",&t);
- while(t--)
- {
- int flag=0,n,i,cnt=0;
- scanf("%d",&n);
- int ara[n+1];
- for(i=0;i<n;i++)
- {
- scanf("%d",&ara[i]);
- }
- if(ara[0]>=ara[1])
- for(i=0;i<n-1;i++)
- {
- if(ara[i]>ara[i+1])
- {
- cnt++;
- if(cnt==n-1)flag=1;
- }
- }
- else
- for(i=0,cnt=0;i<n-1;i++)
- {
- if(ara[i]<ara[i+1])
- {
- cnt++;
- if(cnt==n-1)flag=1;
- }
- }
- if(flag==1)
- {
- printf("YES\n");
- }
- else printf("NO\n");
- }
- }
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