제출 #1280170

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1280170		Haanhtien	Bootfall (IZhO17_bootfall)	C++17	0 / 100	1 ms	572 KiB

bootfall

#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define FOR(i, a, b) for(int i=(a), _b=(b); i<=_b; i++)
#define FORD(i, a, b) for(int i=(a), _b=(b); i>=_b; i--)
#define BIT(i, j) ((i>>j)&1)
#define pb push_back
#define ii pair<ll, ll>
#define pii pair<ll, ii>
#define fi first
#define se second
#define all(x) x.begin(), x.end()


const ll inf = 1e18;
const ll mod = 1e15;
const ll N = 505;
const ll M = 500;

int n;
ll f[N * N], a[N], sum, b[N * N];
int res[N], bit[N];

void solve()
{
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
        sum += a[i];
    }


    f[0] = 1;
    for (int i = 1; i <= n; i++)
    {
        for (int j = sum; j >= a[i]; j--)
        {
            (f[j] += f[j - a[i]]) %= mod;
        }
    }

    if (sum % 2 != 0 || f[sum/2] == 0)
    {
        cout << 0;
        return;
    }

    fill (res + 1, res + sum + 1, 1);
    for (int i = 1; i <= n; i++)
    {
        ll tmp = sum - a[i];
        fill(bit, bit + sum + 1, 0);
        for (int j = a[i]; j <= sum; j++)
        {
            f[j] -= f[j - a[i]];
            f[j] += mod;
            f[j] %= mod;
        }
        for (int A = 1; A <= sum; A++)
        {
            if (f[A] == 0) continue;
            ll B = tmp - A;
            ll x = abs (A - B);
            bit[x] = 1;
        }
        for (int k = 1; k <= sum; k++) res[k] &= bit[k];
        for (int j = sum; j >= a[i]; j--)
        {
            (f[j] += f[j - a[i]]) %= mod;
        }
    }


    vector<int> v;
    for (int i = 1; i <= sum; i++)
    {
        if (res[i]) v.pb(i);
    }
    cout << v.size() << '\n';
    for (auto i : v) cout <<i << ' ';

}

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "task"
    if(fopen(task".inp", "r"))
    {
        freopen(task".INP", "r", stdin);
        freopen(task".OUT", "w", stdout);
    }

    solve();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

bootfall.cpp: In function 'int32_t main()':
bootfall.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen(task".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bootfall.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen(task".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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