| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 291518 | _7_7_ | The Big Prize (IOI17_prize) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "prize.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
//#define int long long
//#pragma GCC optimize("Ofast")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")
#define file(s) freopen(s".in","r",stdin); freopen(s".out","w",stdout);
#define fastio ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define all(x) x.begin(), x.end()
#define sz(s) (int)s.size()
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define s second
#define f first
typedef pair < long long, long long > pll;
typedef pair < int, int > pii;
typedef unsigned long long ull;
typedef vector < pii > vpii;
typedef vector < int > vi;
typedef long double ldb;
typedef long long ll;
typedef double db;
typedef tree < int, null_type, less < int >, rb_tree_tag, tree_order_statistics_node_update > ordered_set;
const int inf = 1e9, maxn = 2e5 + 48, mod = 998244353, N = 2e5 + 12;
const int dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1}, block = 300;
const pii base = mp(1171, 3307), Mod = mp(1e9 + 7, 1e9 + 9);
const db eps = 1e-12, pi = acos(-1);
const ll INF = 1e18;
int t[N << 2], n, T[N];
bool was[N];
pii tt[N];
void update (int pos, int x, int v = 1, int tl = 0, int tr = n - 1) {
t[v] += x;
if (tl == tr)
return;
int tm = (tl + tr) >> 1;
if (pos <= tm)
update(pos, x, v << 1, tl, tm);
else
update(pos, x, v << 1 | 1, tm + 1, tr);
}
int p[N];
int get2 (int k, int v = 1, int tl = 0, int tr = n - 1) {
if (tl == tr)
return tl;
int tm = (tl + tr) >> 1;
if (t[v << 1] < k)
return get2(k - t[v << 1], v << 1 | 1, tm + 1, tr);
return get2(k, v << 1, tl, tm);
}
pii get (int pos) {
if (was[pos])
return tt[pos];
was[pos] = 1;
vi v = ask(pos);
return tt[pos] = mp(v[0], v[1]);
}
void inc (int pos) {
while (pos < n) {
++T[pos];
pos |= pos + 1;
}
}
int get1 (int r) {
int res = 0;
while (r >= 0) {
res += T[r];
r = (r & (r + 1)) - 1;
}
return res;
}
int find_best(int _n) {
n = _n;
srand(time(0));
for (int i = 0; i < n; ++i)
update(i, 1);
int m = min(447 n);
vector < pii > V;
for (int i = 0; i < m; ++i)
V.pb({get(i).f + get(i).s, i});
sort(all(V));
if (!V[0].f)
return V[0].s;
int cnt = V.back().f;
set < int > q;
for (auto x : V) {
q.insert(x.s);
if (x.f != V.back().f) {
update(x.s, -1);
q.erase(x.s);
inc(x.s);
--cnt;
}
}
int l = 1;
while (cnt) {
int r = t[1];
int mxPos = inf;
for (auto x : q)
if (get(x).f != get1(x)) {
mxPos = x;
break;
}
while (l <= r) {
int mid = (l + r) >> 1;
int pos = get2(mid);
if (pos > mxPos) {
r = mid - 1;
continue;
}
q.insert(pos);
if (get(pos).f + get(pos).s != V.back().f) {
q.erase(pos);
cnt--;
update(pos, -1);
inc(pos);
if (get(pos).f + get(pos).s == 0)
return pos;
break;
}
if (get(pos).f != get1(pos))
r = mid - 1;
else
l = mid + 1;
}
}
return 0;
}