#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main()
{
	int	shouhin[100][2];
	int	shurui;
	int	goukei;
	int	i;

	printf("商品の種類の数=\n");
	scanf("%d", &shurui);
	for (i = 0; i < shurui; i++) {
		printf("%3d: 商品の価格 購入した個数=\n", i + 1);
		scanf("%d%d", &shouhin[i][0], &shouhin[i][1]);
	}

	goukei = 0;
	for (i = 0; i < shurui; i++) {
		printf("%3d: 価格=%d 個数=%d\n", i + 1, shouhin[i][0], shouhin[i][1]);
		goukei += shouhin[i][0] * shouhin[i][1];
	}
	printf("合計金額=%d\n", goukei);
	return 0;
}