Submission #1589604

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Source Code Expand

#include<cstdio>
int n,d,ans,x[210],y[210],p[210];
int main(){
	scanf("%d",&n);
	int M=998244353;
	p[0]=1;
	for(int i=1;i<=n;i++){
		scanf("%d%d",&x[i],&y[i]);
		p[i]=1ll*p[i-1]*2%M;
	}
	ans=p[n]-n-1;
	for(int i=1;i<=n;i++){
		for(int j=i+1;j<=n;j++){
			d=0;
			for(int k=j+1;k<=n;k++)d+=(y[i]-y[j])*(x[i]-x[k])==(y[i]-y[k])*(x[i]-x[j]);
			ans=(ans+M-p[d])%M;
		}
	}
	printf("%d",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:4:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:8:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&x[i],&y[i]);
                            ^

Judge Result