80求改

#include<stdio.h>
int main() {
	int N,ans=0,now=1;
	int num[10000] = { 0 };
	scanf("%d", &N);
	for (int i = 0; i < N; i++) {
		scanf("%d", &num[i]);
	}
	
	
	for (int i = 0; i < N-2; i++) {
		if (num[i] + 1 == num[i + 1]) {
			now++;
		}
		else if (num[i] == num[i + 1])continue;
		else {
			if (ans < now) ans = now;  
			now = 1;
			continue; 
		}

	}
    if (ans < now) ans = now;  
	printf("%d", ans);
	return 0;
}