掉石頭問題

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include<math.h>
#include<stdlib.h>

int main()
{
	int num = 0;
	int stone[10000][2] = {0};
	int index = 0;
	char end;
	do {
		scanf("%d", &num);
		int count = 0;
		for (int i = 0; i <= index; i++) {
			if (num == stone[i][0]) {
				stone[i][1] = stone[i][1] + 1;
				count = -1;
				break;
			}
		}
		if (count != -1) {
			index++;
			stone[index][0] = num;
			stone[index][1] = 1;
		}

	} while (end = getchar() != '\n');

	for (int i = 1; i <= index; i++) {
		if (stone[i][1] % 3!=0) {
			printf("%d", stone[i][0]);
			break;
		}
	}
}