Submission #42001

#	Time	Username	Problem	Language	Result	Execution time	Memory
42001		TAMREF	Bali Sculptures (APIO15_sculpture)	C++11	100 / 100	100 ms	864 KiB

sculpture

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

typedef long long ll;

const int mx = 2005;

int n, A, B;
ll S[mx], ans;

bool dp1[105][105];

void solve1(){
    ans = 0;
    ll cur = 0;
    for(int b = 41; b >= 0; b--){
        ll t = cur | (1LL << b);
        dp1[0][0] = true;
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= i; j++){
                dp1[i][j] = false;
                for(int k = 0; k < i; k++){
                    ll ps = S[i] - S[k];
                    if(!(ps & t)){
                        dp1[i][j] |= dp1[k][j-1];
                    }
                }
            }
        }

        bool able = false;
        for(int i = A; i <= B; i++){
            able |= dp1[n][i];
        }

        if(able){
            cur = t;
        }else{
            ans |= (1LL << b);
        }
    }
}

int dp2[mx];

void solve2(){
    ans = 0;
    ll cur = 0;
    for(int b = 41; b >= 0; b--){
        ll t = cur | (1LL << b);
        for(int i = 1; i <= n; i++){
            dp2[i] = 1e9;
            for(int j = 0; j < i; j++){
                ll ps = S[i] - S[j];
                if(!(ps & t)){
                    dp2[i] = min(dp2[i], dp2[j] + 1);
                }
            }
        }
        if(dp2[n] <= B){
            cur = t;
        }else{
            ans |= (1LL << b);
        }
    }
}

void input(){
    cin >> n >> A >> B;
    for(int i = 1; i <= n; i++){
        cin >> S[i];
        S[i] += S[i-1];
    }
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    input();
    n <= 100 ? solve1() : solve2();
    cout << ans << endl;
    return 0;
}

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