Submission #1008453

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008453		Whisper	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	78 ms	600 KiB

sculpture

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (b); i >= (a); i --)
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define REPD(i, n) for (int i = (n) - 1; i >= 0; --i)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)


constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

/*
    Phu Trong from Nguyen Tat Thanh High School for gifted student
*/

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
#define MAX         2005
int nArr, l, r;
int A[MAX];
void init(void){
    cin >> nArr >> l >> r;
    for (int i = 1; i <= nArr; ++i) cin >> A[i];
}

void process(void){
    if (nArr <= 100){
        int ans = 0, cur = 0;
        REPD(j, 51){
            cur |= MASK(j);
            vector<vector<int>> dp(nArr + 5, vector<int>(r + 5, 0));
            dp[0][0] = 1;
            for (int i = 1; i <= nArr; ++i){
                int sm = 0;
                for (int k = i; k >= 1; --k){
                    sm += A[k];
                    int v = (sm & cur); // we only consider the bits that have passed
                    if ((v & ans) == v){
                        for (int gr = 1; gr <= r; ++gr) dp[i][gr] |= dp[k - 1][gr - 1];
                    }
                }
            }
            bool has = 0;
            for (int i = l; i <= r; ++i) has |= dp[nArr][i];
            if (has == 0) ans |= MASK(j);
        }
        cout << ans;
    }
    else{
        int ans = 0, cur = 0;
        REPD(j, 51){
            cur |= MASK(j);
            vector<int> dp(nArr + 5, INF);
            dp[0] = 0;
            for (int i = 1; i <= nArr; ++i){
                int sm = 0;
                for (int k = i; k >= 1; --k){
                    sm += A[k];
                    int v = (sm & cur);
                    if ((v & ans) == v){
                        minimize(dp[i], dp[k - 1] + 1);
                    }
                }
            }
            if (dp[nArr] > r) ans |= MASK(j);
        }
        cout << ans;
    }
}
signed main(){
    #define name "Whisper"
    cin.tie(nullptr) -> sync_with_stdio(false);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    init();
    process();
}

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