Submission #1220979

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Source Code Expand

#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int a[210001],ans,i,j,k,n,m;
int sgn(int x){
	if (x>0) return 1;
	return (x==0)?0:-1;
}
int main(){
	scanf("%d",&n);
	for (i=1;i<=n;i++) scanf("%d",&a[i]);
	for (i=3,ans=1;i<=n;i++){
		if (sgn(a[i]-a[i-1])*sgn(a[i-1]-a[i-2])<0) i++,ans++;
	}
	printf("%d\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:12:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (i=1;i<=n;i++) scanf("%d",&a[i]);
                                      ^

Judge Result