Submission #823732

#	Time	Username	Problem	Language	Result	Execution time	Memory
823732		cig32	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	594 ms	588 KiB

sculpture

#include "bits/stdc++.h"
using namespace std;
#define int long long 
#define double long double
const int MAXN = 1e5 + 10;
const int MOD = 1e9 + 7;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y) {
  int u = uniform_int_distribution<int>(x, y)(rng); return u;
}
int bm(int b, int p) {
  if(p==0) return 1 % MOD;
  int r = bm(b, p >> 1);
  if(p&1) return (((r*r) % MOD) * b) % MOD;
  return (r*r) % MOD;
}
int inv(int b) { 
  return bm(b, MOD-2);
}
int fastlog(int x) {
  return (x == 0 ? -1 : 64 - __builtin_clzll(x) - 1);
}
void printcase(int i) { cout << "Case #" << i << ": "; }
void solve(int tc) {
  int n, a, b;
  cin >> n >> a >> b;
  int y[n+1];
  for(int i=1; i<=n; i++) cin >> y[i];
  int ps[n+1];
  ps[0] = 0;
  for(int i=1; i<=n; i++) ps[i] = ps[i-1] + y[i];
  if(a!=1) {
    int ans = 1e18;
    for(int k=a; k<=b; k++) {
        int msk = 0;
        for(int bit=44; bit>=0; bit--) {
            int dp[k+1][n+1];
            for(int i=0; i<=k; i++) {
                for(int j=0; j<=n; j++) {
                    dp[i][j] = 0;
                }
            }
            for(int i=1; i<=n; i++) dp[1][i] = ((ps[i] & (msk + (1ll << bit))) == 0);
            for(int i=2; i<=k; i++) {
                for(int j=i; j<=n; j++) {
                    for(int l=i-1; l<j; l++) {
                        int wow = ps[j] - ps[l];
                        if((wow & (msk + (1ll << bit))) == 0) {
                            dp[i][j] |= dp[i-1][l];
                        }
                    }
                }
            }
            if(dp[k][n]) {
                msk += (1ll << bit);
            }
        }
        ans = min(ans, (1ll << 45) - 1 - msk);
    }
    cout << ans << endl;
    return;
  }
  int dp[n+1];
  int ans = 0;
  int forbid = 0;
  for(int i=40; i>=0; i--) {
    dp[0] = 0;
    int newf = forbid | (1ll<<i);
    for(int j=1; j<=n; j++) {
      dp[j] = 1e18;
      for(int k=0; k<j; k++) {
        int cur = ps[j] - ps[k];
        if((newf & cur) == 0) dp[j] = min(dp[j], dp[k] + 1);
      }
    }
    if(dp[n] <= b) forbid |= (1ll<<i);
  }
  cout << (1ll<<41) - 1 - forbid << '\n';
}
int32_t main() {
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}
// 勿忘初衷

Compilation message (stderr)

sculpture.cpp: In function 'void solve(long long int)':
sculpture.cpp:64:7: warning: unused variable 'ans' [-Wunused-variable]
   64 |   int ans = 0;
      |       ^~~

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