n=int(input())
a=input().split()
a=list(map(int,a))
k=1
b=a[0]
for i in range(1,n):
    if(a[i]==b):
        k=k+1
    else:
        if(k>1):
            print(b,k)
        b=a[i]
        k=1
if(k>1):
    print(b,k)
/**************************************************************
	Problem: 1886
	User: admin
	Language: Python
	Result: Accepted
	Time:111 ms
	Memory:34480 kb
****************************************************************/