Submission #882719

#	Time	Username	Problem	Language	Result	Execution time	Memory
882719		mychecksedad	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	90 ms	4700 KiB

sculpture

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
const int N = 5000+100, M = 1e5+10, K = 52, MX = 30;


ll n, a, b, A[N], pref[N], dp[N][N];
pair<ll, ll> DP[N];

ll sum(int i, int j){
  return pref[j] - pref[i-1];
}

bool check(ll val){
  if(n <= 100){
    for(int i = 0; i <= n; ++i) for(int j = 0; j <= n; ++j) dp[i][j] = 0;
    dp[0][0] = 1;
    for(int i = 1; i <= n; ++i){
      for(int j = 1; j <= i; ++j){
        for(int k = 0; k < i; ++k){
          if((sum(k + 1, i) & val) == 0) dp[i][j] |= dp[k][j - 1];
        }
      }
    }
    bool ans = 0;
    for(int i = a; i <= b; ++i) ans |= dp[n][i];
    return ans;
  }
  for(int i = 0; i <= n; ++i) DP[i] = {0, 0};
  DP[0] = {1, 0};
  for(int i = 1; i <= n; ++i){
    for(int j = 0; j < i; ++j){
      if((sum(j + 1, i) & val) == 0 && DP[j].first == 1){
        if(DP[i].first == 0) DP[i] = {1, DP[j].second + 1};
        else DP[i].second = min(DP[i].second, DP[j].second + 1);
      }
    }
  }
  return (DP[n].first && DP[n].second <= b);
}

void solve(){
  cin >> n >> a >> b;
  for(int i = 1; i <= n; ++i) cin >> A[i];
  pref[0] = 0;
  for(int i = 1; i <= n; ++i) pref[i] = pref[i - 1] + A[i];
  ll ans = 0;
  
  for(ll bit = 45; bit >= 0; --bit){
    if(check(ans + (1ll<<bit))){
      ans += (1ll<<bit);
    }
  }


  cout << (1ll<<46)-1-ans;
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  // cin >> tt;
  while(tt--){
    solve();
    en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
} 

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:68:15: warning: unused variable 'aa' [-Wunused-variable]
   68 |   int tt = 1, aa;
      |               ^~

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