Submission #63262

#	Time	Username	Problem	Language	Result	Execution time	Memory
63262		Tenuun	Bootfall (IZhO17_bootfall)	C++17	100 / 100	514 ms	4288 KiB

bootfall

#include<bits/stdc++.h>

using namespace std;

int sum=0;
int c[250001], res[250001];

void add(int t){
	sum+=t;
	for(int i=sum; i>=t; i--){
		c[i]+=c[i-t];
	}
}

void del(int t){
	for(int i=t; i<=sum; i++){
		c[i]-=c[i-t];
	}
	sum-=t;
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	memset(c, 0, sizeof c);
	memset(res, 0, sizeof res);
	c[0]=1;
	int n;
	cin >> n;
	int a[n];
	for(int i=0; i<n; i++) {
		cin >> a[i];
		add(a[i]);
	}
	if(sum%2 || !c[sum/2]) return cout << 0, 0;
	for(int i=0; i<n; i++){
		del(a[i]);
		for(int j=1; j<=sum; j++){
			if((sum+j)%2) continue;
			if(c[(sum+j)/2]) res[j]++;
		}
		add(a[i]);
	}
	vector<int> ans;
	for(int i=1; i<=sum; i++){
		if(res[i]==n) ans.push_back(i);
	}
	cout << ans.size() << endl;
	for(int i=0; i<ans.size(); i++) cout << ans[i] << " ";
	return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:49:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<ans.size(); i++) cout << ans[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