Submission #1313255

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313255		danglayloi1	Bali Sculptures (APIO15_sculpture)	C++20	100 / 100	60 ms	464 KiB

sculpture

#include <bits/stdc++.h>
#define ii pair<int, int>
#define fi first
#define se second
#define inf 0x3f3f3f3f3f3f3f3f
using namespace std;
using ll = long long;
const ll mod=1e9+7;
const int nx=2e3+5;
const int LG=41;
int n, a[nx], A, B, dp[nx];
ll cur=0, base=0, pre[nx];
bool f[105][105], can[nx];
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n>>A>>B;
    for(int i = 1; i <= n; i++)
        cin>>a[i], pre[i]=pre[i-1]+a[i];
    if(n<=100)
    {
        for(int i = A; i <= B; i++)
            can[i]=1;
        for(int bit = LG-1; bit >= 0; bit--)
        {
            base|=(1ll<<bit);
            memset(f, 0, sizeof(f));
            f[0][0]=1;
            for(int i = 1; i <= n; i++)
            {
                for(int j = 1; j <= B; j++)
                {
                    for(int k = 0; k < i; k++)
                    {
                        if(!f[k][j-1]) continue;
                        ll tmp=(pre[i]-pre[k])&base;
                        if((tmp&cur)==tmp)
                            f[i][j]=1;
                    }
                }
            }
            bool ok=0;
            for(int i = A; i <= B; i++)
                if(f[n][i] && can[i]) ok=1;
            if(ok)
            {
                for(int i = A; i <= B; i++)
                    if(!f[n][i]) can[i]=0;
            }
            else cur|=(1ll<<bit);
        }
        return cout<<cur, 0;
    }
    for(int i = A; i <= B; i++)
        can[i]=1;
    for(int bit = LG-1; bit >= 0; bit--)
    {
        base|=(1ll<<bit);
        memset(dp, 0x3f, sizeof(dp));
        dp[0]=0;
        for(int i = 1; i <= n; i++)
        {
            for(int j = 0; j < i; j++)
            {
                ll tmp=(pre[i]-pre[j])&base;
                if((tmp&cur)==tmp)
                    dp[i]=min(dp[i], dp[j]+1);
            }
        }
        if(dp[n]>B) cur|=(1ll<<bit);
    }
    cout<<cur;
}

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