C :

int main(int argc, char* argv[])
{int n,m,i,a[81],b[81],j;
while(~scanf("%d",&n)){
while(n--)
{
scanf("%d",&m);
for(i=0;i<m;i++)
scanf("%d",&a[i]);
j=0;
for(i=0;i<m;i++)
{if(i==0){if(a[0]>a[1]||a[0]<a[1])b[j++]=i;}
else if(i==m-1){if(a[m-1]>a[m-2]||a[m-1]<a[m-2])b[j++]=i;}
else {if((a[i]>a[i-1]&&a[i]>a[i+1])||(a[i]<a[i-1]&&a[i]<a[i+1]))b[j++]=i;}
}

for(i=0;i<j;i++)
printf(j-i==1?"%d\n":"%d ",b[i]);
}
}
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	int n,k,a[80],i,b[80],j;
	while(scanf("%d",&n)!=EOF)
	{
		while(n--)
		{
			scanf("%d",&k);
			for(i=0;i<k;i++)
				scanf("%d",&a[i]);
			j=0;
			if(a[0]<a[1]||a[0]>a[1])
				b[j++]=0;
			for(i=1;i<k-1;i++)
				if((a[i]>a[i-1]&&a[i]>a[i+1])||(a[i]<a[i-1]&&a[i]<a[i+1]))
					b[j++]=i;
			if(a[k-1]<a[k-2]||a[k-1]>a[k-2])
				b[j++]=k-1;
			for(i=0;i<j;i++)
				printf(i==j-1?"%d\n":"%d ",b[i]);
		}
	}
	return 0;
}