Submission #1751366

---

Source Code Expand

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

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:10:61: 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",x+i,y+i),ans=(ans<<1)%lsk;
                                                             ^

Judge Result