#include <iostream>
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int>pp;
const int MAX=200000;
int n,m,outp,adj[MAX],leftmost[MAX],diff[MAX];
vector<int>best[MAX];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin>>n>>m;
for(int i=0;i<n;i++)adj[i]=(1<<30);
for(int i=0;i<n;i++)leftmost[i]=(1<<30);
for(int i=0;i<m;i++){
int a,b;
cin>>a>>b;
a--;
b--;
adj[max(a,b)]=min(adj[max(a,b)],min(a,b));
}
leftmost[n-1]=min(adj[n-1],n-2);
for(int i=n-2;i>=0;i--)leftmost[i]=min(leftmost[i+1],min(adj[i],i-1));
for(int i=0;i<n;i++){
if(adj[i]==(1<<30))continue;
diff[adj[i]+1]++;
if(i+1<n)diff[i+1]--;
}
for(int i=1;i<n;i++)diff[i]+=diff[i-1];
int cur=0;
for(int i=n-1;i>=1;i--){
for(int y:best[i])cur=max(cur,y);
best[leftmost[i]].push_back(cur+diff[i]);
if(i==1)cout<<n-1-cur-diff[i]<<"\n";
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
5024 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5016 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
5 ms |
4924 KB |
Output is correct |
| 5 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
4 ms |
4940 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
5024 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5016 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
5 ms |
4924 KB |
Output is correct |
| 5 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5024 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5016 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
5 ms |
4924 KB |
Output is correct |
| 16 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 18 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 19 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 20 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 22 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 23 |
Correct |
6 ms |
5196 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 25 |
Correct |
7 ms |
5068 KB |
Output is correct |
| 26 |
Correct |
7 ms |
5068 KB |
Output is correct |
| 27 |
Correct |
7 ms |
5068 KB |
Output is correct |
| 28 |
Correct |
8 ms |
5068 KB |
Output is correct |
| 29 |
Correct |
4 ms |
5020 KB |
Output is correct |
| 30 |
Correct |
11 ms |
5068 KB |
Output is correct |
| 31 |
Correct |
12 ms |
5068 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
5024 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5016 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
5 ms |
4924 KB |
Output is correct |
| 5 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5024 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5016 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
5 ms |
4924 KB |
Output is correct |
| 16 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 18 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 19 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 20 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 22 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 23 |
Correct |
6 ms |
5196 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 25 |
Correct |
7 ms |
5068 KB |
Output is correct |
| 26 |
Correct |
7 ms |
5068 KB |
Output is correct |
| 27 |
Correct |
7 ms |
5068 KB |
Output is correct |
| 28 |
Correct |
8 ms |
5068 KB |
Output is correct |
| 29 |
Correct |
4 ms |
5020 KB |
Output is correct |
| 30 |
Correct |
11 ms |
5068 KB |
Output is correct |
| 31 |
Correct |
12 ms |
5068 KB |
Output is correct |
| 32 |
Correct |
22 ms |
13536 KB |
Output is correct |
| 33 |
Correct |
12 ms |
8528 KB |
Output is correct |
| 34 |
Correct |
53 ms |
7472 KB |
Output is correct |
| 35 |
Correct |
56 ms |
8208 KB |
Output is correct |
| 36 |
Correct |
63 ms |
8344 KB |
Output is correct |
| 37 |
Correct |
63 ms |
8376 KB |
Output is correct |
| 38 |
Correct |
9 ms |
8444 KB |
Output is correct |
| 39 |
Correct |
10 ms |
8396 KB |
Output is correct |
| 40 |
Correct |
26 ms |
6856 KB |
Output is correct |
| 41 |
Correct |
50 ms |
7728 KB |
Output is correct |
| 42 |
Correct |
58 ms |
8476 KB |
Output is correct |
| 43 |
Correct |
53 ms |
8356 KB |
Output is correct |
| 44 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 45 |
Correct |
4 ms |
4996 KB |
Output is correct |
