| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 64875 | 2018-08-06T02:19:33 Z | qkxwsm | Martian DNA (IOI16_dna) | C++17 | 0 ms | 0 KB |
/*
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
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;
string s;
int turns = 0;
int N;
bool make_test(string p)
{
// debug(p);
turns++;
if (p.length() > s.length()) return false;
for (int i = 0; i <= s.length() - p.length(); i++)
{
if (s.substr(i, p.length()) == p) return true;
}
// cerr << "false " << p << ' ' << s << endl;
return false;
}
string dup(char c, int t)
{
string res;
for (int i = 0; i < t; i++)
{
res += c;
}
return res;
}
string analyse(int n, int t)
{
N = n;
string res;
int lo = 0, hi = N;
while(hi > lo)
{
int mid = (hi + lo + 1) / 2;
if (make_test(dup('1', mid)))
{
lo = mid;
}
else
{
hi = mid - 1;
}
}
if (lo == 0)
{
return dup('0', N);
}
// cerr << "lo = " << lo << endl;
int inrow = 0;
for (int i = 0; i <= N + lo; i++)
{
// cerr << res << endl;
res += '0';
if (make_test(res))
{
inrow = 0;
continue;
}
else
{
// cerr << "fail " << res << endl;
res.back() = '1';
inrow++;
// cerr << "inrow " << inrow << endl;
// cerr << "fail "<< res << endl;
if (inrow > lo)
{
// cerr << "blah " << res << endl;
//need to backtrack
do
{
res.pop_back();
}
while(!res.empty() && !(make_test(res)));
// cerr << "now " << res << endl;
break;
}
}
}
// cerr << res << endl;
while(res.size() < N)
{
res = '1' + res;
if (!make_test(res))
{
res[0] = '0';
}
}
return res;
}
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 >> s;
// cerr << "huh tf\n";
cout << analyse(s.length(), 1024) << '\n';
cout << turns << " turns\n";
// cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
return 0;
}