# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
375290 | NurstanDuisengaliev | Po (COCI21_po) | C++14 | 60 ms | 6508 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.
// Nurstan Duisengaliev(REALBOY)
// не, не надо меня узнавать
/*#pragma GCC target ("avx2")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("O3")*/
#include <bits/stdc++.h>
#define ll long long
#define all(x) x.begin(), x.end()
#define in insert
#define mp make_pair
#define F first
#define S second
#define ppf pop_front
#define pb push_back
#define ppb pop_back
#define pf push_front
#define pii pair <int, int>
#define pll pair <ll, ll>
#define boost() ios_base::sync_with_stdio(0), cin.tie(0)
#define sz(x) (int)x.size()
using namespace std;
const int N = (int)2e5 + 123;
const int mod = (int)1e9 + 7;
const ll INF = (ll)1e18 + 1;
int n;
int a[N];
int d[N * 4];
map <int, int> last;
void build (int v, int l, int r) {
if (l == r) {
d[v] = a[l];
return;
}
int mid = l + r >> 1;
build (v * 2, l, mid);
build (v * 2 + 1, mid + 1, r);
d[v] = min (d[v * 2], d[v * 2 + 1]);
}
int get (int v, int l, int r, int nl, int nr) {
if (nl > r || l > nr) return mod;
if (nl <= l && r <= nr) return d[v];
int mid = l + r >> 1;
return min (get (v * 2, l, mid, nl, nr), get (v * 2 + 1, mid + 1, r, nl, nr));
}
void solve () {
cin >> n;
for (int i = 1; i <= n; i ++) {
cin >> a[i];
}
build (1, 1, n);
int ans = 0;
for (int i = 1; i <= n; i ++) {
if (a[i] != 0) {
if (last[a[i]] == 0) {
ans ++;
}
else {
if (get (1, 1, n, last[a[i]], i) < a[i]) {
ans ++;
}
}
last[a[i]] = i;
}
}
cout << ans;
}
main () {
// freopen (".in", "r", stdin);
// freopen (".out", "w", stdout);
boost ();
int TT = 1;
// cin >> TT;
while (TT --) {
solve ();
}
return 0;
}
Compilation message (stderr)
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