Submission #866955

#	Time	Username	Problem	Language	Result	Execution time	Memory
866955		tothanhdat1421	Bali Sculptures (APIO15_sculpture)	C++14	50 / 100	93 ms	600 KiB

sculpture

/* ========================  INCL  ======================== */
#include <iostream>
#include <fstream>
#include <math.h>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <map>
#include <bitset>

using namespace std;

/* Code by { To Thanh Dat } 12TT THPT Chuyen Ben Tre */

/* ========================TEMPLATE======================== */
#define ll  long long
#define ull unsigned long long
#define pii pair<int, int>
#define vi  vector<int>
#define vii vector<pair<int, int>>
#define mii map<int, int>
#define pb  push_back
#define eb  emplace_back
#define mp  make_pair
#define fi  first
#define se  second

#define For(i, a, b)   for(int i=a; i<=b; ++i)
#define rFor(i, a, b)  for(int i=a; i>=b; --i)
#define Rep(i, n)      for(int i = 0; i < (int)n; ++i)
#define rRep(i, n)     for(int i = (int)n - 1; i >= 0; --i)

/* ========================CONSTANT======================== */
const int intINF = -1 ^ (1<<31);
const ll llINF = -1LL ^ (1LL << 63);
const int mod = 1e9+7;
const int N = 2000+5;

/* ========================VARIABLE======================== */
int n, A, B;
ll a[N];
int F[N];

/* ========================  MAIN  ======================== */
bool can(ll mask)
{
    For(i, 1, n+1) F[i] = 1e5;
    F[1] = 0;
    For(i, 1, n)
    {
        if(F[i] >= 1e5) continue;
        ll cursum = 0;
        For(j, i, n)
        {
            cursum += a[j];
            if((cursum & mask) == 0)
            {
                F[j+1] = min(F[j+1], 1 + F[i]);
            }
        }
    }

    // cout << "mask = " << mask << endl;
    // For(i, 0, n) cout << F[i] << ' ';
    // cout << endl;

    return (A <= F[n+1] && F[n+1] <= B);
}

int main()
{
    if(fopen("APIO15_sculpture.inp", "r"))
    {
        freopen("APIO15_sculpture.inp", "r", stdin);
        freopen("APIO15_sculpture.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0); cin.tie(NULL);
    
    cin >> n >> A >> B;
    For(i, 1, n) cin >> a[i];
    // pref[0] = 0;
    // For(i, 1, n) pref[i] = pref[i-1] + a[i];    

    ll cur_mask = 0;
    rFor(i, 60, 0)
    {
        if(can(cur_mask | (1ll << i)))
        {
            cur_mask = cur_mask | (1ll << i);
            // cout << "   => cur mask = " << cur_mask << endl;
        }
    }

    cout << ((1ll << 61)-1 - cur_mask);
    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:75:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |         freopen("APIO15_sculpture.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:76:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |         freopen("APIO15_sculpture.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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