Death Knight Hero#6022
There once was a champion of WoW
Arthasdk the name he was bestowed
He Death Gripped you to his side
His Chains of Ice stopped your stride
And Obliterates made you say "OWW!"
But one day our hero got puzzled
His Death Grip totally zzled
In his darkest despair
He could barely hear
"OMG NOOB u Chains of Iced than u Death Gripped"
You are given a recording of the abilities our hero used in his battles.
The first line of input contains a single integer (1 \leq n \leq 100), the number of battles our hero played.
Then follow lines, each containing a sequence of k_i (1 \leq k_i \leq 1000) characters. Each character is either 'C', 'D', or 'O', which denote the abilities used by our hero in the -th battle. 'C' is Chains of Ice, 'D' is Death Grip, and 'O' is Obliterate.
Output the number of battles our hero won, assuming he won each battle where Chains of Ice was not immediately followed by Death Grip.
Example 1