Submission #846046

#	Time	Username	Problem	Language	Result	Execution time	Memory
846046		vjudge1	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	58 ms	4392 KiB

sculpture

#include <bits/stdc++.h>

#define task "test"
#define pii pair<int, int>
#define ll long long
#define fi first
#define se second
#define pb push_back

using namespace std;

void io() {
    if(fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
}

const int inf = 1e9;
const int mod = 1e9+7;
const int nmax = 2e3+5;

int n, p, q, dp2[nmax];
ll a[nmax];
bool dp[nmax][nmax];

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    io();

    cin >> n >> p >> q;

    for(int i = 1; i <= n; ++i) {
        cin >> a[i];
        a[i] += a[i-1];
    }
    ll ans = (1ll << 41) - 1;

    if(p == 1) {
        for(int t = 40; t >= 0; --t) {
            for(int i = 1; i <= n; ++i) dp2[i] = inf;
            ans ^= 1ll << t;
            for(int i = 1; i <= n; ++i) {
                for(int k = 1; k <= i; ++k) {
                    if((ans | (a[i] - a[k-1])) == ans) {
                        dp2[i] = min(dp2[i], dp2[k-1] + 1);
                    }
                }
            }
            if(dp2[n] > q) ans ^= (1ll << t);
        }
    }
    else {
        for(int t = 40; t >= 0; --t) {
            memset(dp, 0, sizeof(dp));
            dp[0][0] = 1; ans ^= 1ll << t;
            for(int i = 1; i <= n; ++i) {
                for(int j = 1; j <= n; ++j) {
                    for(int k = 1; k <= i; ++k) {

                        if((ans | (a[i] - a[k - 1])) == ans) {
                            dp[i][j] |= dp[k-1][j-1];
                        }
                    }
                }
            }

            bool ok = 0;

            for(int i = p; i <= q; ++i)
                if(dp[n][i] == 1) ok = 1;

            if (!ok)  ans ^= 1ll<<t;
        }
    }

    cout << ans;
}

Compilation message (stderr)

sculpture.cpp: In function 'void io()':
sculpture.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:15:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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