Submission #846238

#	Time	Username	Problem	Language	Result	Execution time	Memory
846238		vjudge1	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	67 ms	596 KiB

sculpture

#include <bits/stdc++.h>
#define pll pair <long long, long long>
#define fi first
#define se second

using namespace std;
#define task "code"
#define all(s) s.begin(), s.end()

typedef long long ll;

const int ar = 2e3+2;
const ll mod = 998244353;
const ll oo = 1e18;

int n, p, q;
ll sum[ar];
bool f[101][101];
ll dp[ar];

void sub1() {
    ll ans = 0;
    for(int bit = 40; bit >= 0; --bit) {
        memset(f, 0, sizeof f);
        f[0][0] = 1;

        ll tmp = ans | (1ll << bit);
        for(int j = 1; j <= q; ++j)
        for(int i = j; i <= n; ++i)
        for(int k = 1; k <= i; ++k) {
            ll tong = sum[i] - sum[k - 1];
            f[i][j] |= (f[k - 1][j - 1] && ((tong & tmp) == 0));
        }
        for(int i = p; i <= q; ++i) if(f[n][i]) {
            ans |= (1ll << bit);
            break;
        }
    }
    ll res = 0;
    for(int i = 0 ; i <= 40 ; ++i)
        if (ans >> i & 1 ^ 1) res |= (1ll << i);
    cout << res;
}

void sub2() {
    ll ans = 0;
    for(int bit = 40; bit >= 0; --bit) {
        memset(dp, 0x3f, sizeof dp);
        dp[0] = 0;

        ll tmp = ans | (1ll << bit);
        for(int i = 1; i <= n; ++i)
        for(int k = 1; k <= i; ++k) {
            ll tong = sum[i] - sum[k - 1];
            if((tong & tmp) == 0 && dp[k - 1] < oo)
                dp[i] = min(dp[i], dp[k - 1] + 1);
        }
        if(dp[n] <= q) ans = tmp;
    }
    ll res = 0;
    for(int i = 0 ; i <= 40 ; ++i)
        if (ans >> i & 1 ^ 1) res |= (1ll << i);
    cout << res;
}

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

    cin >> n >> p >> q;
    for(int i = 1; i <= n; ++i) {
        int a;
        cin >> a;
        sum[i] = sum[i - 1] + a;
    }

    if(p != 1 && n <= 100)
        sub1();
    else
        sub2();

    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'void sub1()':
sculpture.cpp:41:22: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   41 |         if (ans >> i & 1 ^ 1) res |= (1ll << i);
      |             ~~~~~~~~~^~~
sculpture.cpp: In function 'void sub2()':
sculpture.cpp:62:22: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   62 |         if (ans >> i & 1 ^ 1) res |= (1ll << i);
      |             ~~~~~~~~~^~~
sculpture.cpp: In function 'int main()':
sculpture.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         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