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// Zbalansowane słowa.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <stdio.h>
int main()
{
	unsigned short occurence[3000][3]{ {0,0,0},{0,0,0} };
	char debugbuff[3000] = " ";
	char letter;
	unsigned int index=1;
	while (letter=getchar())
	{
		debugbuff[index] = letter;
		if (letter >= 'a' && letter <= 'c')occurence[index][letter - 'a']++;
		else break;
		occurence[index + 1][0] = occurence[index][0];
		occurence[index + 1][1] = occurence[index][1];
		occurence[index + 1][2] = occurence[index][2];
		index++;
	}
	unsigned int occurenceEqual = 0;
	unsigned short dif[3];
	unsigned int maxOccur = 0;
	for (size_t i = 1; i < index; i++)
	{
		for (size_t j = i; j < index; j++)
		{

			dif[0] = (occurence[j][0] - occurence[i-1][0]);
			dif[1] = (occurence[j][1] - occurence[i-1][1]);
			dif[2] = (occurence[j][2] - occurence[i-1][2]);
			if (dif[0] == 0) {
				if (dif[1] == 0) {
					maxOccur = dif[2];
				}
				else {
					maxOccur = dif[1];
				}
			}
			else {
				maxOccur = dif[0];
			}
			size_t k;
			for (k = 0; k < 3; k++)
			{
				if (dif[k] == 0 || maxOccur == dif[k]) continue;
				else {
					k = 4;
					break;
				}
			}
			if (k == 3) {
				occurenceEqual++;

			}
		}
	}
	printf("%d",occurenceEqual);
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file