Submission #1263547

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263547		Bui_Quoc_Cuong	Bootfall (IZhO17_bootfall)	C++20	13 / 100	1093 ms	444 KiB

bootfall

#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i=a;i<=(int)b;i++)
#define FORD(i,a,b) for(int i=a;i>=(int)b;i--)
#define fi first
#define se second
#define pb push_back
#define ALL(A) A.begin(), A.end()
#define BIT(mask,i) ((mask>>(i))&1)
#define ll long long
using namespace std;
template <class A, class B> bool maximize(A &a, const B b) {if(a<b){a = b;return 1;} return 0;}
template <class A, class B> bool minimize(A &a, const B b) {if(a>b){a = b;return 1;} return 0;}
const int maxn = 505;
int n;
int a[maxn];
void init()
{
    cin >> n;
    FOR(i, 1, n) cin >> a[i];
}
//bitset <500 * 500> dp;
bool dp[25005];
bool check(int val)
{
    a[n + 1] = val;
    FOR(i, 1, n + 1)
    {
        vector <int> rem;
        int sum = 0;
        FOR(j, 1, n + 1) if(i != j) sum+= a[j], rem.push_back(a[j]);
        if(sum & 1) return 0;
        FOR(j, 0, sum / 2) dp[j] = 0;
        dp[0] = 1;
        for(int val : rem)
        {
            FORD(j, sum / 2, val)
            {
                dp[j]|= dp[j - val];
            }
        }
        if(dp[sum / 2] == 0) return 0;
    }
    return 1;
}
void process()
{
    vector <int> res;
    sort(a + 1, a + 1 + n);
    int sum = 0;
    FOR(i, 1, n) sum+= a[i];
    FOR(i, 1, sum) if(check(i)) res.push_back(i);
    cout << res.size() << '\n';
    for(int &val : res) cout << val << ' ';
}
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #define Hori "kieuoanh"
    if(fopen(Hori".inp", "r"))
    {
        freopen(Hori".inp", "r", stdin);
        freopen(Hori".out", "w", stdout);
    }
    init();
    process();
    return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen(Hori".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bootfall.cpp:63:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         freopen(Hori".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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