Submission #925214

#	Time	Username	Problem	Language	Result	Execution time	Memory
925214		atom	Bootfall (IZhO17_bootfall)	C++17	13 / 100	1050 ms	700 KiB

bootfall

#include "bits/stdc++.h"
// @JASPER'S BOILERPLATE
using namespace std;
using ll = long long;

#ifdef JASPER
#include "debug.h"
#else
#define debug(...) 166
#endif

const int N = 505;
int n;
int a[N];

signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    
    #ifdef JASPER
        freopen("in1", "r", stdin);
    #endif

    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> a[i];

    int sz = accumulate(a + 1, a + 1 + n, 0);
	sz *= 2;
    vector <int> ans;
    for (int x = 1; x <= sz; ++x) {

    	bool able = 1;
    	for (int k = 0; k <= n; ++k) {
    		swap(a[k], x);
    		vector <int> dp(sz + 5, 0);
    		dp[0] = 1;
    		for (int i = 1; i <= n; ++i)
	    		for (int j = sz; j >= a[i]; --j)
	    			dp[j] |= dp[j - a[i]];
    		
    		int tar = accumulate(a + 1, a + 1 + n, 0);
    		if (tar % 2 || (dp[tar / 2] == 0))
    			able = 0;
    		swap(a[k], x);
    	} 
    	
    	if (able) ans.push_back(x);
    }
    cout << (int) (ans.size()) << "\n";
    for (int x : ans) cout << x << " ";
}

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35