#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define FOR(i, l, r) for(ll i = l; i <= r; i++)
const ll MAX = 1000005;
ll a[MAX], dp[MAX];
bool used[MAX];
int main(){
ll n; cin >> n;
memset(used, false, sizeof used);
FOR(i, 1, n){
cin >> a[i];
}
dp[1] = 1; used[a[1]] = true;
FOR(i, 2, n){
if(used[a[i] + 1]) dp[i] = dp[i - 1];
else dp[i] = dp[i - 1] + 1;
used[a[i]] = true;
}
cout << dp[n];
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
3 ms |
1408 KB |
Output isn't correct |
2 |
Incorrect |
4 ms |
1280 KB |
Output isn't correct |
3 |
Incorrect |
4 ms |
1408 KB |
Output isn't correct |
4 |
Incorrect |
5 ms |
1408 KB |
Output isn't correct |
5 |
Incorrect |
199 ms |
17272 KB |
Output isn't correct |
6 |
Incorrect |
204 ms |
18808 KB |
Output isn't correct |
7 |
Incorrect |
163 ms |
15864 KB |
Output isn't correct |
8 |
Incorrect |
161 ms |
15480 KB |
Output isn't correct |
9 |
Incorrect |
186 ms |
16504 KB |
Output isn't correct |
10 |
Incorrect |
180 ms |
17024 KB |
Output isn't correct |