Can anybody plz ezplain:

for(int i = 1; i <= n; i++) { scanf("%s", a[i] + 1); }

I know this one

for(int i = 1; i <= n; i++) { scanf("%s", a[i] ); }

But I don't know the use of above scanf("%s", a[i] + 1); Plz guide me on this.