// 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];
void compress () {
set <int> s;
map <int, int> m;
for (int i = 1; i <= n; i ++) s.in (a[i]);
int pos = 1;
for (auto it : s) {
m[it] = pos ++;
}
for (int i = 1; i <= n; i ++) a[i] = m[a[i]];
}
vector <int> g[N];
void solve () {
cin >> n;
for (int i = 1; i <= n; i ++) {
cin >> a[i];
}
compress ();
int ans = 0;
for (int i = 1; i <= n; i ++) {
bool check = 0;
for (int j = 1; j <= n; j ++) {
if (a[j] == i) {
if (check == 0) {
ans ++;
check = 1;
}
a[j] = 0;
}
else {
if (a[j] == 0) check = 0;
}
}
}
cout << ans;
/*for (int i = 1; i <= n; i ++) {
g[a[i]].pb (i);
}
for (int i = 1; i <= n; i ++) {
ans ++;
for (int j = 1; j < sz (g[i]); j ++) {
int pos = g[i][j];
if (a[pos - 1] < a[i]) {
ans ++;
}
}
} */
}
main () {
// freopen (".in", "r", stdin);
// freopen (".out", "w", stdout);
boost ();
int TT = 1;
// cin >> TT;
while (TT --) {
solve ();
}
return 0;
}
Compilation message
Main.cpp:81:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
81 | main () {
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
4972 KB |
Output is correct |
2 |
Incorrect |
4 ms |
4972 KB |
Output isn't correct |
3 |
Incorrect |
4 ms |
4972 KB |
Output isn't correct |
4 |
Execution timed out |
1095 ms |
5228 KB |
Time limit exceeded |
5 |
Execution timed out |
1064 ms |
5356 KB |
Time limit exceeded |
6 |
Execution timed out |
1071 ms |
10092 KB |
Time limit exceeded |
7 |
Execution timed out |
1093 ms |
14828 KB |
Time limit exceeded |