Submission #1253709

#	Time	Username	Problem	Language	Result	Execution time	Memory
1253709		hoa208	Bali Sculptures (APIO15_sculpture)	C++20	0 / 100	1096 ms	328 KiB

sculpture

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++)
#define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; i--)
#define pa pair<ll, ll>
#define fi first
#define se second
#define bit(mask, j) ((mask >> j) & 1)
#define t_test int t;cin >> t;while(t--)
const   ll mod = 1e9 + 7;
const   ll INF = 1e18;
inline  void adm(ll &x){if(x>=mod)x%=mod;else if(x<0)x+=mod;}
//--------------------------------------------------------------------

const ll N = 2003;
ll w[N], s[N];
ll get_sum(ll i, ll j) {
    return s[j] - s[i - 1];
}
ll n, a, b;
namespace sub3 {
    const ll M = 30;
    bool dp[M][M];
    void slove() {
        ll LG = __lg(s[n]);
        ll mask = 0;
        FORD(j, LG, 0) {
            memset(dp, 0, sizeof dp);
            dp[0][0] = 1;
            FOR(i, 1, n) {
                FOR(y, 1, b) {
                    FOR(u, 0, i - 1) {
                        if(dp[u][y - 1] == 1) {
                            ll x = mask | get_sum(u + 1, i);
                            bool ok = true;
                            FORD(v, LG, j) {
                                if(bit(mask, v) != bit(x, v)) {
                                    ok = false;
                                    break;
                                }
                            }
                            if(ok) {
                                dp[i][y] = 1;
                            }
                        }
                    }
                }
            }
            bool ok = false;
            FOR(y, a, b) {
                if(dp[n][y]) {
                    ok = true;
                    break;
                }
            }
            if(!ok) mask ^= (1LL << j);
        }
        cout << mask;
    }
}
namespace sub4 {
    ll dp[N];
    void slove() {
        ll LG = __lg(s[n]);
        ll mask = 0;
        FORD(j, LG, 0) {
            memset(dp, 0x3f, sizeof dp);
            dp[0] = 0;
            FOR(i, 1, n) {
                FOR(u, 0, i - 1) {
                    ll x = mask | get_sum(u + 1, i);
                    bool ok = true;
                    FORD(v, LG, j) {
                        if(bit(mask, v) != bit(x, v)) {
                            ok = false;
                            break;
                        }
                    }
                    if(ok) {
                        dp[i] = min(dp[i], dp[u] + 1);
                    }
                }
            }
            bool ok = false;
            if(dp[n] <= b) ok = true;
            if(!ok) mask ^= (1LL << j);
        }
        cout << mask;
    }
}
void hbmt() {
    cin >> n >> a >> b;
    FOR(i, 1, n) {
        cin >> w[i];
        s[i] = s[i - 1] + w[i];
    }
    if(n <= 100) return sub3::slove();
    // return sub4::slove();
}

int main() {
    
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    
    if(fopen("hbmt.inp", "r")) {
        freopen("hbmt.inp", "r", stdin);
        freopen("hbmt.out", "w", stdout);
    }
    
    // t_test 
    hbmt();
    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:108:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |         freopen("hbmt.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:109:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  109 |         freopen("hbmt.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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