Submission #1085506

#	Time	Username	Problem	Language	Result	Execution time	Memory
1085506		mingga	Bali Sculptures (APIO15_sculpture)	C++17	9 / 100	34 ms	604 KiB

sculpture

#include "bits/stdc++.h"

using namespace std;

#define ln "\n"
#define dbg(x) cout << #x << " = " << x << ln
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define inf 2e18
#define fast_cin()                  \
  ios_base::sync_with_stdio(false); \
  cin.tie(NULL)
#define out(file) freopen(file, "w", stdout)
#define in(file) freopen(file, "r", stdin)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define ll long long
int MOD = 1e9 + 7;
const int N = 2001;
int y[N], a, b, n;
ll ps[N], dp[N][N];

void sub1() {
  ll ans = inf;
  for(int mask = 0; mask < (1 << n); mask++) {
    if(((mask >> (n-1)) & 1) == 0) continue; 
    int cnt = __builtin_popcount(mask);
    if(cnt < a or cnt > b) continue;
    ll s = 0;
    ll cur = 0;
    // cerr << "CNT " << cnt << ln;
    for(int i = 0; i < n; i++) {
      s += y[i+1];
      if((mask >> i) & 1) {
        cur |= s;
        // cerr << s << ' ';
        s = 0;
      }
    }
    // cerr << ln;
    ans = min(ans, cur);
  }
  cout << ans;
}

bool f[51][21][501];
void sub2() {
  f[0][0][0] = 1;
  for(int i = 1; i <= n; i++) {
    f[i][1][ps[i]] = 1;
  }
  int mx = ps[n];
  for(int i = 1; i <= n; i++) {
    for(int j = 1; j <= b; j++) {
      for(int k = 0; k <= mx; k++) {
        for(int t = i + 1; t <= n; t++) {
          f[t][j+1][k | (ps[t]-ps[i])] = f[i][j][k];
        }
      }
    }
  }
  for(int k = 0; k <= mx; k++) {
    for(int i = a; i <= b; i++) {
      if(f[n][i][k]) {
        cout << k;
        return;
      }
    }
  }
}

signed main() {
    fast_cin();
    cin >> n >> a >> b;
    for(int i = 1; i <= n; i++) cin >> y[i], ps[i] = ps[i-1] + y[i];
    if(n <= 20) sub1();
    else if(n <= 50) sub2();
    // cout << ln;
    // sub2();
    cerr << "\nTime: " << clock() * 1000 / CLOCKS_PER_SEC;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 21
• Subtask 4: 0 / 25
• Subtask 5: 0 / 29