Submission #163373

#	Time	Username	Problem	Language	Result	Execution time	Memory
163373		combi1k1	Bali Sculptures (APIO15_sculpture)	C++14	0 / 100	4 ms	632 KiB

sculpture

#include<bits/stdc++.h>

using namespace std;

#define ll  long long

const int   N   = 2e3 + 1;

ll  a[N];
ll  f[N][N];
int g[N];

int main()  {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int n;  cin >> n;
    int A;  cin >> A;
    int B;  cin >> B;

    for(int i = 1 ; i <= n ; ++i)   {
        cin >>  a[i];
        a[i] += a[i - 1];
    }

    assert(A > 1);

    if (A > 1)  {
        for(int i = 1 ; i <= n ; ++i)
            f[i][0] = 1e18;
        for(int i = 1 ; i <= n ; ++i)
        for(int j = 1 ; j <= i ; ++j)   {
            f[i][j] = 1e18;
            for(int k = j - 1 ; k < i ; ++k)
                f[i][j] = min(f[i][j],f[k][j - 1] | (a[i] - a[k]));
        }
        ll  ans = 1e18;

        for(int i = A ; i <= B ; ++i)
            ans = min(ans,f[n][i]);

        cout << ans;
    }
    else    {
        ll  cur_mask = 0;

        for(int b = 40 ; b >= 0 ; --b)  {
            for(int i = 1 ; i <= n ; ++i)   {
                g[i] = 1e9;
                int t = 0;
                for(int j = 0 ; j < i ; ++j)    {
                    ll  S = a[i] - a[j];

                    S >>= b;
                    S <<= b;

                    if ((S & cur_mask) != S)
                        continue;

                    g[i] = min(g[i],g[j] + 1);
                }
            }
            if (g[n] > B)   cur_mask |= (1ll << b);
        }

        cout << cur_mask << endl;
    }
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:50:21: warning: unused variable 't' [-Wunused-variable]
                 int t = 0;
                     ^

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