#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct book
{
	char name[30];
	char field[30];
	int year;
};
int main() {
	struct book libry[3];
	int i,k;
	for (i = 0; i < 3; i++)
	{
		printf("Enter name of %d book:", i + 1);
		gets_s(libry[i].name);
		printf("Enter field of %d book:", i + 1);
		gets_s(libry[i].field);
		printf("Enter year of %d book:", i + 1);
		scanf("%d", &libry[i].year);
		getchar();
	}
	for (i = 0; i < 3; i++)
	{
		printf("\n %d. %s", i + 1, libry[i].name);
		printf(", %s , %d", libry[i].field, libry[i].year);
	}
	{
		for (i = 0; i < 3; i++)
			if (strcmp(libry[i].field, "Physics")==0)
				k = k + 1;
		printf("Sum of Physics books: %d", k);
	}
	getchar();
	return 0;
}