제출 #993437

#제출 시각아이디문제언어결과실행 시간메모리
993437vjudge1Bootfall (IZhO17_bootfall)C++17
100 / 100
225 ms4556 KiB
#include <bits/stdc++.h> using namespace std; const int N = 530; const int M = 250010; int f[M], f2[M], cnt[M]; int main() { f[0] = 1; int sum = 0; int n; cin >> n; int a[n]; for (int i = 1; i <= n; i++) { cin >> a[i]; sum += a[i]; for (int j = M; j >= a[i]; j--) { f[j] = (f[j] + f[j - a[i]]); } } if (sum % 2 == 0) { if (f[sum / 2] == 0) { cout << 0 << '\n'; return 0; } } for (int i = 1; i <= n; i++) { for (int j = 0; j <= M; j++) { if (j >= a[i]) { f2[j] = (f[j] - f2[j - a[i]]); } else { f2[j] = f[j]; } } int odd = (sum - a[i]) % 2; for (int j = odd; j <= M; j += 2) { int all = sum - a[i] + j; if (all % 2 == 0) { int h = all / 2; if (f2[h] != 0 || (h >= j && f2[h - j] != 0)) { cnt[j]++; } } } } vector<int> save; for (int i = 1; i <= M; i++) if (cnt[i] == n) save.push_back(i); cout << save.size() << '\n'; for (int x : save) cout << x << " "; return 0; }
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