/*
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 100013
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<pii, pii> ppp;
typedef pair<ld, ld> pdd;
int N;
int arr[MAXN];
ppp matpow[40];
set<pii> rep;
void debugset()
{
cerr << "set contains:";
for (auto p : rep)
{
for (int i = p.fi; i <= p.se; i += 2)
{
cerr << ' ' << i;
}
}
cerr << endl;
}
ppp get(int dif)
{
int D = dif / 2;
ppp res;
if (dif % 2)
{
return {{D + 1, 1}, {0, 0}};
}
else
{
return {{D + 1, 1}, {INF - 1, 0}};
}
}
ppp mul(ppp a, ppp b)
{
ppp res;
res.fi.fi = ((1ll * a.fi.fi * b.fi.fi + 1ll * a.fi.se * b.se.fi) % INF);
res.fi.se = ((1ll * a.fi.fi * b.fi.se + 1ll * a.fi.se * b.se.se) % INF);
res.se.fi = ((1ll * a.se.fi * b.fi.fi + 1ll * a.se.se * b.se.fi) % INF);
res.se.se = ((1ll * a.se.fi * b.fi.se + 1ll * a.se.se * b.se.se) % INF);
return res;
}
ppp mat_expo(int e)
{
// cerr << "what's " << e << endl;
e /= 2;
ppp res = {{1, 0}, {0, 1}};
if (e == 0) return res;
for (int i = 0; i <= (31 - __builtin_clz(e)); i++)
{
if (e & (1 << i))
{
res = mul(res, matpow[i]);
}
}
return res;
}
struct node
{
node* ch[2];
pii stor;
ppp trans, subtrans;
int pri;
int subt;
node(pii p)
{
pri = randomize(INF);
ch[0] = ch[1] = nullptr;
stor = p;
subt = 1;
}
void recalc()
{
if (ch[0] && ch[1])
{
subt = ch[0] -> subt + 1 + ch[1] -> subt;
subtrans = mul(mul(ch[0] -> subtrans, trans), ch[1] -> subtrans);
}
else if (ch[0])
{
subt = ch[0] -> subt + 1;
subtrans = mul(ch[0] -> subtrans, trans);
}
else if (ch[1])
{
subt = 1 + ch[1] -> subt;
subtrans = mul(trans, ch[1] -> subtrans);
}
else
{
subt = 1;
subtrans = trans;
}
}
};
node *root;
ll occ;
typedef pair<node*, node*> pnn;
pnn split(node* t, int v)
{
if (!t) return {t, t};
t -> recalc();
int cur = t -> stor.fi;
if (v < cur)
{
pnn p = split(t -> ch[0], v);
t -> ch[0] = p.se; t -> recalc();
return {p.fi, t};
}
else
{
pnn p = split(t -> ch[1], v);
t -> ch[1] = p.fi; t -> recalc();
return {t, p.se};
}
}
node* merge(node *l, node *r)
{
if (!l) return r;
if (!r) return l;
if (l -> pri > r -> pri)
{
l -> ch[1] = merge(l -> ch[1], r);
l -> recalc();
return l;
}
else
{
r -> ch[0] = merge(l, r -> ch[0]);
r -> recalc();
return r;
}
}
int lower_bound(node* t, pii p)
{
if (!t)
{
return 0;
}
if (t -> stor >= p)
{
return lower_bound(t -> ch[0], p);
}
return (t -> ch[0] ? t -> ch[0] -> subt : 0) + 1 + lower_bound(t -> ch[1], p);
}
void terase(pii p)
{
auto it = rep.UB(p);
int was = prev(prev(it)) -> se;
pnn t = split(root, p.fi - 1), t1 = split(t.se, p.fi);
if (it == rep.end())
{
root = t.fi;
}
else
{
pnn t2 = split(t1.se, it -> fi);
t2.fi -> trans = mul(get((t2.fi -> stor).fi - was), mat_expo(t2.fi -> stor.se - t2.fi -> stor.fi));
t2.fi -> recalc();
root = merge(t.fi, merge(t2.fi, t2.se));
}
return;
}
void tinsert(pii p)
{
node* cur = new node(p);
auto it = rep.UB(p);
int was = prev(it) -> se;
pnn t = split(root, p.fi);
if (it == rep.end())
{
cur -> trans = mul(get(p.fi - was), mat_expo(p.se - p.fi));
cur -> recalc();
root = merge(t.fi, cur);
}
else
{
pnn t1 = split(t.se, it -> fi);
t1.fi -> trans = mul(get(t1.fi -> stor.fi - p.se), mat_expo((t1.fi -> stor.se) - (t1.fi -> stor.fi)));
t1.fi -> recalc();
cur -> trans = mul(get(p.fi - was), mat_expo(p.se - p.fi));
cur -> recalc();
root = merge(merge(t.fi, cur), merge(t1.fi, t1.se));
}
}
void smartinsert(int L, int R)
{
if (L > R) return;
int lt = L, rt = R;
auto it = rep.LB({R + 2, -INF});
if (it != rep.end() && it -> fi == R + 2)
{
rt = it -> se;
rep.erase(it);
terase({R + 2, rt});
}
it = prev(rep.LB({L - 1, -INF}));
if (it -> se != 0 && it -> se == L - 2)
{
lt = it -> fi;
rep.erase(it);
terase({lt, L - 2});
}
tinsert({lt, rt});
rep.insert({lt, rt});
return;
}
void smartdelete(int L, int R)
{
if (L > R) return;
auto it = prev(rep.LB({L + 1, -INF}));
int lt = it -> fi, rt = it -> se;
rep.erase(it);
terase({lt, rt});
if (lt <= L - 2)
{
tinsert({lt, L - 2});
rep.insert({lt, L - 2});
}
if (R + 2 <= rt)
{
tinsert({R + 2, rt});
rep.insert({R + 2, rt});
}
return;
}
bool chk(int x)
{
if (x == 0) return false;
auto it = prev(rep.LB({x + 1, -INF}));
return ((it -> se != 0) && (it -> fi <= x) && (it -> se >= x) && ((x + it -> fi) % 2 == 0));
}
void ins(int x)
{
if (x < 0)
{
return;
}
if (x == 0)
{
x = 1;
}
if (chk(x + 1))
{
// cerr << "help insert " << x << " yep you have " << x + 1 << endl;
// debugset();
int rt = (prev(rep.LB({x + 2, -INF}))) -> se;
smartdelete(x + 1, rt);
smartinsert(rt + 1, rt + 1);
}
else if (chk(x - 1))
{
//delete x - 1, so it causes a chain reaction
smartdelete(x - 1, x - 1);
ins(x + 1);
}
else if (chk(x))
{
if (x == 1)
{
smartdelete(x, x);
ins(2);
}
else if (x == 2)
{
smartdelete(x, x);
ins(3);
ins(1);
}
else
{
// cerr << "ins " << x + 1 << " ins " << x - 2 << endl;
//u know x + 1 is safe right..., bc u cant have x + 1, x
//
// cerr << "ins " << x << endl;
// debugset();
int lt = (prev(rep.LB({x + 1, -INF}))) -> fi;
smartdelete(lt, x);
smartinsert(lt + 1, x - 1);
//delete(x - 2); insert(x - 1); insert(x - 4);
ins(lt - 2);
ins(x + 1);
//insert(x + 1); insert(x - 2);
}
}
else
{
smartinsert(x, x);
}
return;
}
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);
}
rep.insert({0, 0});
root = new node({0, 0});
root -> trans = {{1, 0}, {0, 1}};
root -> recalc();
matpow[0] = {{2, 1}, {INF - 1, 0}};
for (int i = 1; i <= 40; i++)
{
matpow[i] = mul(matpow[i - 1], matpow[i - 1]);
}
readi(N);
for (int i = 0; i < N; i++)
{
readi(arr[i]);
}
for (int i = 0; i < N; i++)
{
ins(arr[i]);
// debugset();
ppp cup = root -> subtrans;
int ans = (cup.fi.fi + cup.se.fi) % INF;
printi(ans); putchar('\n');
}
cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
return 0;
}
Compilation message
fib.cpp: In function 'int32_t main()':
fib.cpp:444:11: 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);
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
fib.cpp:445:11: 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 |
2 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
572 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
