Submission #85703

#	Time	Username	Problem	Language	Result	Execution time	Memory
85703		farukkastamonuda	Bootfall (IZhO17_bootfall)	C++14	100 / 100	499 ms	5580 KiB

bootfall

#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
#define lo long long 
#define inf 1000000000
#define md 1000000007
#define pb push_back
#define li 505
using namespace std;
lo int n,A[li],sum,dp[li*li];
int vis[li*li];
vector<lo int> v;
void add(lo int x){
	sum+=x;
	for(lo int i=500*500;i>=x;i--){
		dp[i]+=dp[i-x];
	}
}
void del(lo int x){
	sum-=x;
	for(lo int i=x;i<=500*500;i++){
		dp[i]-=dp[i-x];
	}
}
int main(){
	scanf("%lld",&n);
	dp[0]=1;
	for(int i=1;i<=n;i++) {scanf("%lld",&A[i]);add(A[i]);}
	if(sum%2 || !dp[sum/2]){
		printf("0\n");
		return 0;
	}
	for(int i=1;i<=n;i++){
		del(A[i]);
		for(int j=1;j<=500*500;j++){
			if((sum+j)%2!=0 || !dp[(sum+j)/2]){
				vis[j]=1;
			} 
		}	
		add(A[i]);
	}
	//~ printf("%d\n",(int)v.size());
	//~ return 0;
	for(int i=1;i<=500*500;i++){
		if(!vis[i]) v.pb(i);
	}
	printf("%lld\n",(lo int)v.size());
	//~ return 0;
	for(int i=0;i<(int)v.size();i++){
		printf("%lld ",v[i]);
	}
	return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
  ~~~~~^~~~~~~~~~~
bootfall.cpp:29:30: 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("%lld",&A[i]);add(A[i]);}
                         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 21 / 21
• Subtask 6: 35 / 35