Submission #112050

#	Time	Username	Problem	Language	Result	Execution time	Memory
112050		Eug1ena	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	192 ms	632 KiB

sculpture

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

int N, A, B;
vector<lint> sum{0};

lint notbit = 0;

lint dp[105][105];

bool minimum(int now, int cnt){
    if(now == N){
        return (A <= cnt && cnt <= B);
    }else if(dp[now][cnt] != -1){
        return dp[now][cnt];
    }
    int ans = false;
    for(int i = now + 1; i <= N; i++){
        if(((sum[i] - sum[now]) & notbit) == 0){
            ans |= minimum(i, cnt + 1);
        }
    }
    return dp[now][cnt] = ans;
}

int dp2[2020];

int minimum2(int now){
    if(now == N){
        return 0;
    }else if(dp2[now] != -1){
        return dp2[now];
    }
    int ans = 1e9;
    for(int i = now + 1; i <= N; i++){
        if(((sum[i] - sum[now]) & notbit) == 0){
            ans = min(ans, minimum2(i));
        }
    }
    return dp2[now] = ans + 1;
}

int main(){
    cin >> N >> A >> B;
    for(int i = 0; i < N; i++){
        lint Y;
        cin >> Y;
        lint item = sum.back() + Y;
        sum.push_back(item);
    }
    for(int i = 59; i >= 0; i--){
        notbit += (1l << i);
        if(N <= 100){
            memset(dp, -1, sizeof(dp));
            if(!minimum(0, 0)){
                notbit -= (1l << i);
            }
        }else{
            memset(dp2, -1, sizeof(dp2));
            if(minimum2(0) > B){
                notbit -= (1l << i);
            }
        }
    }
    cout << (1l << 60) - 1 - notbit << endl;
}

Compilation message (stderr)

sculpture.cpp: In function 'bool minimum(int, int)':
sculpture.cpp:24:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     return dp[now][cnt] = ans;
            ~~~~~~~~~~~~~^~~~~

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