0049 - Blood Groups

#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;

void Slove(void)	{
	int number, count[4]={0};
	char blood[2+1];

	while (scanf ("%d,%s", &number, blood) != EOF)	{
		if ( !strcmp(blood,"A") )	++count[0];
		else if ( !strcmp(blood,"B") )	++count[1];
		else if ( !strcmp(blood,"AB") )	++count[2];
		else if ( !strcmp(blood,"O") )	++count[3];
	}
	for (int i=0; i<4; ++i)
		cout << count[i] << endl;
}

int main(void)	{
	Slove();
	return 0;
}

足すだけ。。