#include <bits/stdc++.h>
#define upmin(a,b) (a)=(min((a),(b)))
#define upmax(a,b) (a)=(max((a),(b)))
#define INF (0x3f3f3f3f)
using namespace std;
const int MAXN = 200'055;
int L[MAXN], B[MAXN], C[MAXN];
int A[MAXN];
int N;
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
{
int M;
cin >> N >> M;
fill_n(A, N+2, INF);
while(M--) {
int a, b; cin >> a >> b;
if(a > b) swap(a, b);
upmin(A[b], a);
}
}
L[N+1] = N;
for(int i = N; i; i--) L[i] = min({L[i+1], A[i], i-1});
for(int i = N; i; i--) if(A[i] < i) { B[A[i]+1]++; B[i+1]--; }
for(int i = 1; i <= N; i++) B[i+1] += B[i];
int mx = 0;
for(int i = N; 1 < i; i--) {
upmax(mx, C[i]);
upmax(C[L[i]], mx + B[i]);
}
cout << N-1 - (mx + B[2]) << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
0 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
0 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
0 ms |
340 KB |
Output is correct |
| 14 |
Correct |
0 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
0 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
3 ms |
340 KB |
Output is correct |
| 26 |
Correct |
2 ms |
340 KB |
Output is correct |
| 27 |
Correct |
2 ms |
340 KB |
Output is correct |
| 28 |
Correct |
2 ms |
340 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
6 ms |
340 KB |
Output is correct |
| 31 |
Correct |
6 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
0 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
0 ms |
340 KB |
Output is correct |
| 14 |
Correct |
0 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
0 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
3 ms |
340 KB |
Output is correct |
| 26 |
Correct |
2 ms |
340 KB |
Output is correct |
| 27 |
Correct |
2 ms |
340 KB |
Output is correct |
| 28 |
Correct |
2 ms |
340 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
6 ms |
340 KB |
Output is correct |
| 31 |
Correct |
6 ms |
340 KB |
Output is correct |
| 32 |
Correct |
4 ms |
3412 KB |
Output is correct |
| 33 |
Correct |
4 ms |
3412 KB |
Output is correct |
| 34 |
Correct |
39 ms |
4732 KB |
Output is correct |
| 35 |
Correct |
37 ms |
5444 KB |
Output is correct |
| 36 |
Correct |
40 ms |
5560 KB |
Output is correct |
| 37 |
Correct |
38 ms |
5588 KB |
Output is correct |
| 38 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 39 |
Correct |
4 ms |
3028 KB |
Output is correct |
| 40 |
Correct |
17 ms |
2736 KB |
Output is correct |
| 41 |
Correct |
35 ms |
4740 KB |
Output is correct |
| 42 |
Correct |
35 ms |
5432 KB |
Output is correct |
| 43 |
Correct |
36 ms |
5432 KB |
Output is correct |
| 44 |
Correct |
0 ms |
340 KB |
Output is correct |
| 45 |
Correct |
0 ms |
332 KB |
Output is correct |
