Submission #1750586

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
const int mo=998244353;
int ans,x,n,a[205],b[205];
int main(){
	scanf("%d",&n);
	for (int i=1;i<=n;++i) scanf("%d%d",&a[i],&b[i]);
	ans=1; for (int i=1;i<=n;++i) ans=ans*2%mo;
	for (int i=1;i<=n;++i)
	for (int j=i+1;j<=n;++j){
		x=1;
		for (int k=j+1;k<=n;++k)
		if ((a[j]-a[i])*(b[k]-b[i])-(b[j]-b[i])*(a[k]-a[i])==0) x=x*2%mo;
		(ans-=x)%=mo;
	}
	printf("%d",((ans-n-1)%mo+mo)%mo);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:7:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i=1;i<=n;++i) scanf("%d%d",&a[i],&b[i]);
                                                  ^

Judge Result