Submission #649187

#	Time	Username	Problem	Language	Result	Execution time	Memory
649187		ParsaS	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	144 ms	524 KiB

sculpture

// In the name of God
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
typedef long long ll;
#define int ll
const int N = 2000 + 5, MOD = 1e9 + 7;
int n, a[N], A, B;
int dp[N];
bool dp2[N][N];

void solve() {
    if (n <= 100)
        return;
    ll ans = 0;
    int C = 46;
    for (int i = 0; i <= C; i++)
        ans ^= 1LL << i;

    for (int l = C; l >= 0; l--) {
        ans ^= 1LL << l;
        dp[0] = 0;
        for (int i = 1; i <= n; i++) {
            ll sum = 0;
            dp[i] = n + 1;
            for (int j = i; j >= 1; j--) {
                sum += a[j];
                if ((sum & ans) == sum) {
                    dp[i] = min(dp[i], dp[j - 1] + 1);
                }
            }
        }
        if (dp[n] > B)
            ans ^= 1LL << l;
    }
    cout << ans << '\n';
}
void solve2() {
    if (n > 100)
        return;
	ll ans = 0;
    int C = 45;
    for (int i = 0; i <= C; i++)
        ans ^= 1LL << i;

    for (int l = C; l >= 0; l--) {
        ans ^= 1LL << l;
        dp2[0][0] = true;
        for (int j = 1; j <= B; j++) {
            for (int i = 1; i <= n; i++) {
                dp2[i][j] = false;
                ll sum = 0;
                for (int k = i; k >= 1; k--) {
                    sum += a[k];
                    if ((sum & ans) == sum) {
                        dp2[i][j] |= dp2[k - 1][j - 1];
                    }
                }
            }
        }
        bool ok = false;
        for (int j = A; j <= B; j++)
            ok |= dp2[n][j];
        if (!ok)
            ans ^= 1LL << l;
    }
    cout << ans << endl;
}

int32_t main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    cin >> n >> A >> B;
    for (int i = 1; i <= n; i++)
        cin >> a[i];
    solve();
    solve2();
    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'void solve2()':
sculpture.cpp:41:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   41 |     if (n > 100)
      |     ^~
sculpture.cpp:43:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   43 |  ll ans = 0;
      |  ^~

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