/*
PROG: source
LANG: C++11
_____
.' '.
/ 0 0 \
| ^ |
| \ / |
\ '---' /
'._____.'
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
struct chash
{
int operator()(int x) const
{
x ^= (x >> 20) ^ (x >> 12);
return x ^ (x >> 7) ^ (x >> 4);
}
int operator()(long long x) const
{
return x ^ (x >> 32);
}
};
template<typename T> using orderedset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T, typename U> using hashtable = gp_hash_table<T, U, chash>;
template<class T>
void readi(T &x)
{
T input = 0;
bool negative = false;
char c = ' ';
while (c < '-')
{
c = getchar();
}
if (c == '-')
{
negative = true;
c = getchar();
}
while (c >= '0')
{
input = input * 10 + (c - '0');
c = getchar();
}
if (negative)
{
input = -input;
}
x = input;
}
template<class T>
void printi(T output)
{
if (output == 0)
{
putchar('0');
return;
}
if (output < 0)
{
putchar('-');
output = -output;
}
int aout[20];
int ilen = 0;
while(output)
{
aout[ilen] = ((output % 10));
output /= 10;
ilen++;
}
for (int i = ilen - 1; i >= 0; i--)
{
putchar(aout[i] + '0');
}
return;
}
template<class T>
void ckmin(T &a, T b)
{
a = min(a, b);
}
template<class T>
void ckmax(T &a, T b)
{
a = max(a, b);
}
template<class T, class U>
T normalize(T x, U mod = 1000000007)
{
return (((x % mod) + mod) % mod);
}
long long randomizell(long long mod)
{
return ((1ll << 45) * rand() + (1ll << 30) * rand() + (1ll << 15) * rand() + rand()) % mod;
}
int randomize(int mod)
{
return ((1ll << 15) * rand() + rand()) % mod;
}
#define y0 ___y0
#define y1 ___y1
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define PF push_front
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define debug(x) cerr << #x << " = " << x << endl;
const long double PI = 4.0 * atan(1.0);
const long double EPS = 1e-10;
#define MAGIC 347
#define SINF 10007
#define CO 1000007
#define INF 1000000007
#define BIG 1000000931
#define LARGE 1696969696967ll
#define GIANT 2564008813937411ll
#define LLINF 2696969696969696969ll
#define MAXN 2013
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;
int N, L, R;
ll arr[MAXN], pref[MAXN];
bitset<MAXN> edge[MAXN], ok[MAXN];
ll ans = LLINF, best;
int dist[MAXN];
ll solve(int d)
{
best = 0;
for (int i = 0; i <= N; i++)
{
edge[i].set();
}
for (int i = 50; i >= 0; i--)
{
for (int j = 0; j <= N; j++) ok[j].reset();
ok[0][0] = true;
for (int j = 0; j < N; j++)
{
for (int k = j + 1; k <= N; k++)
{
if (!edge[j][k]) continue;
ll rsum = pref[k] - pref[j];
if (rsum & (1ll << i)) continue;
ok[k] |= (ok[j] << 1);
}
}
if (!ok[N][d])
{
best += (1ll << i);
}
else
{
for (int j = 0; j < N; j++)
{
for (int k = j + 1; k <= N; k++)
{
ll rsum = pref[k] - pref[j];
if (rsum & (1ll << i))
{
edge[j][k] = false;
}
}
}
}
}
//delete an edge, ask if there's a path between 0 and v in exactly m moves
return best;
}
ll solve1()
{
best = 0;
for (int i = 0; i <= N; i++)
{
edge[i].set();
}
for (int i = 50; i >= 0; i--)
{
//if dist[N] <= R then ok!
for (int j = 0; j <= N; j++)
{
dist[j] = INF;
}
dist[0] = 0;
queue<int> q;
q.push(0);
while(!q.empty())
{
int u = q.front();
cerr << "vis " << u << endl;
q.pop();
for (int v = u + 1; v <= N; v++)
{
ll rsum = pref[v] - pref[u];
if (!edge[u][v] || (rsum & (1ll << i))) continue;
if (dist[v] > dist[u] + 1)
{
dist[v] = dist[u] + 1;
q.push(v);
}
}
}
if (dist[N] > R)
{
best += (1ll << i);
}
else
{
for (int j = 0; j < N; j++)
{
for (int k = j + 1; k <= N; k++)
{
ll rsum = pref[k] - pref[j];
if (rsum & (1ll << i))
{
edge[j][k] = false;
}
}
}
}
// cerr << i << ' ' << dist[N] << endl;
}
return best;
}
int32_t main()
{
ios_base::sync_with_stdio(0);
srand(time(0));
// cout << fixed << setprecision(10);
// cerr << fixed << setprecision(10);
if (fopen("input.in", "r"))
{
freopen ("input.in", "r", stdin);
freopen ("output.out", "w", stdout);
}
cin >> N >> L >> R;
for (int i = 0; i < N; i++)
{
cin >> arr[i];
pref[i + 1] = pref[i] + arr[i];
}
if (L != 1)
{
for (int i = L; i <= R; i++)
{
ckmin(ans, solve(i));
}
}
else
{
//A=1
ans = solve1();
}
cout << ans << '\n';
// cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
return 0;
}
Compilation message
sculpture.cpp: In function 'int32_t main()':
sculpture.cpp:256:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen ("input.in", "r", stdin);
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:257:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen ("output.out", "w", stdout);
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
460 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
504 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
504 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
