#include <bits/stdc++.h>
using namespace std;
#define sp << " " <<
#define int long long
#define vi vector<int>
#define F(xxx,yyy) for (int xxx=1;xxx<=yyy;xxx++)
#define pii pair<int,int>
#define pb push_back
void solve() {
int n;
cin >> n;
vi a(n+1);
F(i,n) cin >> a[i];
stack<int> bs[n+2];
vi nx(n+1);
F(i,n) {
if (!bs[a[i]+1].empty()) {
nx[bs[a[i]+1].top()] = i;
bs[a[i]+1].pop();
}
bs[a[i]].push(i);
}
int c = 0;
vi vis(n+1,0);
F(i,n) {
if (!vis[i]) {
c++;
int ptr = i;
while (nx[ptr]) {
vis[ptr] = 1;
ptr = nx[ptr];
}
vis[ptr] = 1;
}
}
cout << c << endl;
}
signed main() {
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#ifdef Local
freopen("in","r",stdin);
freopen("out","w",stdout);
#endif
int t = 1;
//cin >> t;
F(i,t) solve();
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1116 KB |
Output is correct |
2 |
Correct |
1 ms |
1628 KB |
Output is correct |
3 |
Correct |
2 ms |
3164 KB |
Output is correct |
4 |
Correct |
2 ms |
3932 KB |
Output is correct |
5 |
Runtime error |
100 ms |
131072 KB |
Execution killed with signal 9 |
6 |
Runtime error |
100 ms |
131072 KB |
Execution killed with signal 9 |
7 |
Runtime error |
97 ms |
131072 KB |
Execution killed with signal 9 |
8 |
Runtime error |
90 ms |
131072 KB |
Execution killed with signal 9 |
9 |
Runtime error |
97 ms |
131072 KB |
Execution killed with signal 9 |
10 |
Runtime error |
95 ms |
131072 KB |
Execution killed with signal 9 |