#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define in insert
#define vll vector<ll>
#define endl "\n"
#define pll pair<ll,ll>
#define all(x) (x).begin() , (x).end()
#define f first
#define s second
#define pr(x) cout<<x<<endl;
#define pr2(x,y) cout<<x<<" "<<y<<endl;
#define pr3(x,y,z) cout<<x<<" "<<y<<endl;
#define prv(v) for(auto x:v) cout<<x<<" ";
#define ffs fflush(stdout);
#define int ll
#define sz(x) (ll)x.size()
using namespace std;
const ll MOD = 1e9+7;
const ll INF = LLONG_MAX;
const ll LOG = 29;
#define PI 3.141592653589793238
const ll N =(1e6+5);
ll fact[N];
long long binpow(long long a, long long b) {
a%=MOD;
long long res = 1;
while (b > 0) {
if (b & 1)
res = (res * a)%MOD;
a = (a * a)%MOD;
b >>= 1;
}
res%=MOD;
return res;
}
void ini(){
fact[0] = 1;
for(int i = 1;i < N;i++){
fact[i] = (fact[i-1] * i)%MOD;
}
}
ll ncr(ll n,ll r){
ll ret = fact[n];
ret = (ret * binpow(fact[r],MOD-2))%MOD;
ret = (ret * binpow(fact[n-r],MOD-2))%MOD;
return ret;
}
ll n;
ll a[N];
bool vis[N];
void solve(){
cin >> n;
for(int i = 1;i<=n;i++){
cin >> a[i];
}
ll ans =0;
for(int i = 1;i <= n;i++){
if(vis[i]) continue;
ans++;
ll h = a[i];
// cout << "HERE " << i << " -> ";
for(int j=i;j<=n;j++){
if(vis[j])continue;
if(a[j] == h){
// cout << j << endl;
h--;
vis[j]=true;
}
}
}
cout << ans << endl;
}
signed main(){
ios_base::sync_with_stdio(0);
// cin.tie(NULL);
ll tt=1;
// cin >> tt;
while(tt--){
solve();
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
384 KB |
Output is correct |
2 |
Correct |
9 ms |
384 KB |
Output is correct |
3 |
Correct |
21 ms |
384 KB |
Output is correct |
4 |
Correct |
22 ms |
384 KB |
Output is correct |
5 |
Execution timed out |
2087 ms |
10232 KB |
Time limit exceeded |
6 |
Execution timed out |
2071 ms |
11128 KB |
Time limit exceeded |
7 |
Execution timed out |
2072 ms |
9056 KB |
Time limit exceeded |
8 |
Execution timed out |
2088 ms |
8952 KB |
Time limit exceeded |
9 |
Execution timed out |
2079 ms |
9848 KB |
Time limit exceeded |
10 |
Execution timed out |
2083 ms |
9848 KB |
Time limit exceeded |