제출 #9154

#제출 시각아이디문제언어결과실행 시간메모리
9154hodducN-orthotope (kriii2_N)C++98
4 / 4
0 ms1088 KiB
#include<stdio.h>
int s[15][2], e[15][2];
int over[15];
int main()
{
	int N;
	int M;
	scanf("%d", &N);
	M = N;
	for(int i = 1; i <= N; i++)
		scanf("%d %d", &s[i][0],&s[i][1]);
	for(int i = 1; i <= N; i++)
		scanf("%d %d", &e[i][0],&e[i][1]);

	for(int i = 1; i <= N; i++)
	{
		if(e[i][1] < s[i][0] || s[i][1] < e[i][0]) {
			printf("-1");
			return 0;
		}
		else if(e[i][1] <= s[i][0] || s[i][1] <= e[i][0]) {
			M--;
		}
	}
	printf("%d", M);
	return 0;
}
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