Submission #1172309

#	Time	Username	Problem	Language	Result	Execution time	Memory
1172309		vibeduck	Bali Sculptures (APIO15_sculpture)	C++20	71 / 100	13 ms	440 KiB

sculpture

#include <bits/stdc++.h> 
using namespace std;

#define pb push_back
#define pf push_front
#define mp make_pair
#define fi first
#define se second
#define int long long
#define all(x) (x).begin(), (x).end()

typedef long double ld;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<bool>> vvb;
typedef vector<vector<ll>> vvll;
typedef vector<string> vs;
typedef vector<vector<string>> vvs;
typedef vector<char> vc;
typedef vector<vector<char>> vvc;
typedef map<int, int> mii;
typedef unordered_map<int, int> umii;

const int mod = 1e9 + 7;
const int inf = INTMAX_MAX;
const bool tc = false;

/*
ST 3
• 1 <= N <= 100
• A = 1
• 1 <= B <= N
• 0 <= Yi <= 20
*/

int n, a, b;
const int mxn = 101;
int y[mxn];

int sub(int &x, int &y) {
    return ((x | y) <= y);
}

void merge(vi &x, vi &y) {
    for (int i = 0; i < y.size(); i++) x.pb(y[i]);
}

int can(int mask) {
    vvi dp(n + 1, vi(n + 1)); dp[n][0] = 1;
    for (int i = n - 1; i >= 0; i--) {
        int s = 0;
        for (int j = i; j < n; j++) {
            s += y[j];
            if (sub(s, mask)) {
                for (int t = 0; t <= n; t++) if (dp[j + 1][t]) dp[i][t + 1] = 1;
            }
        }
    }

    for (int i = a; i <= b; i++) if (dp[0][i]) return 1;
    return 0;
}

inline void solve() {
    cin >> n >> a >> b;
    for (int i = 0; i < n; i++) cin >> y[i];   

    int ans = ((int)1 << (int)43) - (int)1;
    for (int i = 42; i >= 0; i--) {
        int tmp = (ans ^ ((int)1 << i));
        if (can(tmp)) ans = tmp;
    }
    cout << ans << '\n';
}

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

signed main() {
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    //setIO();

    int t = 1;
    if (tc) {
        cin >> t;
    }

    while (t--) {
        solve();
    }
}

Compilation message (stderr)

sculpture.cpp: In function 'void setIO(std::string)':
sculpture.cpp:82:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:83:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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