#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
const int N=1e6+99,mod=1e9+7,S=26;
int n,m,ps[N][S],dp[N][S],pd[N][S],res[N][S],seg[2][N];
void change(int l,int r,int x,int s){
l--,r--;
for(l+=n,r+=n;l<r;l>>=1,r>>=1){
if(l&1) maxm(seg[s][l],x),l++;
if(r&1) r--,maxm(seg[s][r],x);
}
}
int get(int x,int s){
int res=0;
for(x+=n-1;x>0;x>>=1)
maxm(res,seg[s][x]);
return res;
}
int32_t main(){
ios:: sync_with_stdio(0), cin.tie(0), cout.tie(0);
f(i,0,2) fill(seg[i],seg[i]+N,0);
cin>>n>>m;
f(i,0,m){
int u,v;
cin>>u>>v;
//swap(u,v);
if(u<v){
change(u,v,u,0);
}
else{
change(v,u,v,1);
}
}
f(i,0,S) ps[0][i]=1;
f(i,1,n+1){
int s=get(i,0),t=get(i,1);
f(j,0,S){
pd[i][j]=ps[i-1][j];
if(s!=0) Add(pd[i][j],mod-ps[s-1][j]);
}
f(j,0,S){
dp[i][j]=ps[i-1][j];
if(t!=0) Add(dp[i][j],mod-ps[t-1][j]);
}
int sum=0;
f(j,0,S){
ps[i][j]=(ps[i-1][j]+sum)%mod;
Add(sum,dp[i][j]);
}
sum=0;
f_(j,S-1,0){
Add(ps[i][j],sum);
Add(sum,pd[i][j]);
}
}
int ans=0;
f(i,0,S) Add(ans,dp[n][i]);
cout<<ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8148 KB |
Output is correct |
2 |
Correct |
4 ms |
8148 KB |
Output is correct |
3 |
Correct |
5 ms |
8148 KB |
Output is correct |
4 |
Correct |
3 ms |
8148 KB |
Output is correct |
5 |
Correct |
4 ms |
8148 KB |
Output is correct |
6 |
Correct |
3 ms |
8148 KB |
Output is correct |
7 |
Correct |
4 ms |
8160 KB |
Output is correct |
8 |
Correct |
4 ms |
8148 KB |
Output is correct |
9 |
Correct |
4 ms |
8148 KB |
Output is correct |
10 |
Correct |
4 ms |
8148 KB |
Output is correct |
11 |
Correct |
4 ms |
8148 KB |
Output is correct |
12 |
Correct |
4 ms |
8148 KB |
Output is correct |
13 |
Correct |
3 ms |
8148 KB |
Output is correct |
14 |
Correct |
4 ms |
8148 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8148 KB |
Output is correct |
2 |
Correct |
4 ms |
8148 KB |
Output is correct |
3 |
Correct |
5 ms |
8148 KB |
Output is correct |
4 |
Correct |
3 ms |
8148 KB |
Output is correct |
5 |
Correct |
4 ms |
8148 KB |
Output is correct |
6 |
Correct |
3 ms |
8148 KB |
Output is correct |
7 |
Correct |
4 ms |
8160 KB |
Output is correct |
8 |
Correct |
4 ms |
8148 KB |
Output is correct |
9 |
Correct |
4 ms |
8148 KB |
Output is correct |
10 |
Correct |
4 ms |
8148 KB |
Output is correct |
11 |
Correct |
4 ms |
8148 KB |
Output is correct |
12 |
Correct |
4 ms |
8148 KB |
Output is correct |
13 |
Correct |
3 ms |
8148 KB |
Output is correct |
14 |
Correct |
4 ms |
8148 KB |
Output is correct |
15 |
Correct |
3 ms |
8148 KB |
Output is correct |
16 |
Correct |
4 ms |
8148 KB |
Output is correct |
17 |
Correct |
4 ms |
8148 KB |
Output is correct |
18 |
Correct |
7 ms |
8164 KB |
Output is correct |
19 |
Correct |
5 ms |
8236 KB |
Output is correct |
20 |
Correct |
4 ms |
8148 KB |
Output is correct |
21 |
Correct |
4 ms |
8148 KB |
Output is correct |
22 |
Correct |
6 ms |
8148 KB |
Output is correct |
23 |
Correct |
4 ms |
8148 KB |
Output is correct |
24 |
Correct |
4 ms |
8148 KB |
Output is correct |
25 |
Correct |
4 ms |
8148 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8148 KB |
Output is correct |
2 |
Correct |
4 ms |
8148 KB |
Output is correct |
3 |
Correct |
4 ms |
8172 KB |
Output is correct |
4 |
Correct |
4 ms |
8148 KB |
Output is correct |
5 |
Correct |
328 ms |
160708 KB |
Output is correct |
6 |
Correct |
321 ms |
160712 KB |
Output is correct |
7 |
Correct |
376 ms |
160760 KB |
Output is correct |
8 |
Correct |
367 ms |
160716 KB |
Output is correct |
9 |
Correct |
370 ms |
160712 KB |
Output is correct |
10 |
Correct |
24 ms |
14176 KB |
Output is correct |
11 |
Correct |
4 ms |
8148 KB |
Output is correct |
12 |
Correct |
5 ms |
8148 KB |
Output is correct |
13 |
Correct |
417 ms |
160712 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8148 KB |
Output is correct |
2 |
Correct |
4 ms |
8148 KB |
Output is correct |
3 |
Correct |
5 ms |
8148 KB |
Output is correct |
4 |
Correct |
3 ms |
8148 KB |
Output is correct |
5 |
Correct |
4 ms |
8148 KB |
Output is correct |
6 |
Correct |
3 ms |
8148 KB |
Output is correct |
7 |
Correct |
4 ms |
8160 KB |
Output is correct |
8 |
Correct |
4 ms |
8148 KB |
Output is correct |
9 |
Correct |
4 ms |
8148 KB |
Output is correct |
10 |
Correct |
4 ms |
8148 KB |
Output is correct |
11 |
Correct |
4 ms |
8148 KB |
Output is correct |
12 |
Correct |
4 ms |
8148 KB |
Output is correct |
13 |
Correct |
3 ms |
8148 KB |
Output is correct |
14 |
Correct |
4 ms |
8148 KB |
Output is correct |
15 |
Correct |
3 ms |
8148 KB |
Output is correct |
16 |
Correct |
4 ms |
8148 KB |
Output is correct |
17 |
Correct |
4 ms |
8148 KB |
Output is correct |
18 |
Correct |
7 ms |
8164 KB |
Output is correct |
19 |
Correct |
5 ms |
8236 KB |
Output is correct |
20 |
Correct |
4 ms |
8148 KB |
Output is correct |
21 |
Correct |
4 ms |
8148 KB |
Output is correct |
22 |
Correct |
6 ms |
8148 KB |
Output is correct |
23 |
Correct |
4 ms |
8148 KB |
Output is correct |
24 |
Correct |
4 ms |
8148 KB |
Output is correct |
25 |
Correct |
4 ms |
8148 KB |
Output is correct |
26 |
Correct |
16 ms |
14164 KB |
Output is correct |
27 |
Correct |
16 ms |
14252 KB |
Output is correct |
28 |
Correct |
20 ms |
14164 KB |
Output is correct |
29 |
Correct |
18 ms |
14196 KB |
Output is correct |
30 |
Correct |
18 ms |
14252 KB |
Output is correct |
31 |
Correct |
129 ms |
14164 KB |
Output is correct |
32 |
Correct |
16 ms |
14280 KB |
Output is correct |
33 |
Correct |
16 ms |
14220 KB |
Output is correct |
34 |
Correct |
19 ms |
14300 KB |
Output is correct |
35 |
Correct |
138 ms |
14160 KB |
Output is correct |
36 |
Correct |
11 ms |
14164 KB |
Output is correct |
37 |
Correct |
17 ms |
14172 KB |
Output is correct |
38 |
Correct |
16 ms |
14164 KB |
Output is correct |
39 |
Correct |
14 ms |
14204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8148 KB |
Output is correct |
2 |
Correct |
4 ms |
8148 KB |
Output is correct |
3 |
Correct |
5 ms |
8148 KB |
Output is correct |
4 |
Correct |
3 ms |
8148 KB |
Output is correct |
5 |
Correct |
4 ms |
8148 KB |
Output is correct |
6 |
Correct |
3 ms |
8148 KB |
Output is correct |
7 |
Correct |
4 ms |
8160 KB |
Output is correct |
8 |
Correct |
4 ms |
8148 KB |
Output is correct |
9 |
Correct |
4 ms |
8148 KB |
Output is correct |
10 |
Correct |
4 ms |
8148 KB |
Output is correct |
11 |
Correct |
4 ms |
8148 KB |
Output is correct |
12 |
Correct |
4 ms |
8148 KB |
Output is correct |
13 |
Correct |
3 ms |
8148 KB |
Output is correct |
14 |
Correct |
4 ms |
8148 KB |
Output is correct |
15 |
Correct |
3 ms |
8148 KB |
Output is correct |
16 |
Correct |
4 ms |
8148 KB |
Output is correct |
17 |
Correct |
4 ms |
8148 KB |
Output is correct |
18 |
Correct |
7 ms |
8164 KB |
Output is correct |
19 |
Correct |
5 ms |
8236 KB |
Output is correct |
20 |
Correct |
4 ms |
8148 KB |
Output is correct |
21 |
Correct |
4 ms |
8148 KB |
Output is correct |
22 |
Correct |
6 ms |
8148 KB |
Output is correct |
23 |
Correct |
4 ms |
8148 KB |
Output is correct |
24 |
Correct |
4 ms |
8148 KB |
Output is correct |
25 |
Correct |
4 ms |
8148 KB |
Output is correct |
26 |
Correct |
4 ms |
8148 KB |
Output is correct |
27 |
Correct |
4 ms |
8148 KB |
Output is correct |
28 |
Correct |
4 ms |
8172 KB |
Output is correct |
29 |
Correct |
4 ms |
8148 KB |
Output is correct |
30 |
Correct |
328 ms |
160708 KB |
Output is correct |
31 |
Correct |
321 ms |
160712 KB |
Output is correct |
32 |
Correct |
376 ms |
160760 KB |
Output is correct |
33 |
Correct |
367 ms |
160716 KB |
Output is correct |
34 |
Correct |
370 ms |
160712 KB |
Output is correct |
35 |
Correct |
24 ms |
14176 KB |
Output is correct |
36 |
Correct |
4 ms |
8148 KB |
Output is correct |
37 |
Correct |
5 ms |
8148 KB |
Output is correct |
38 |
Correct |
417 ms |
160712 KB |
Output is correct |
39 |
Correct |
16 ms |
14164 KB |
Output is correct |
40 |
Correct |
16 ms |
14252 KB |
Output is correct |
41 |
Correct |
20 ms |
14164 KB |
Output is correct |
42 |
Correct |
18 ms |
14196 KB |
Output is correct |
43 |
Correct |
18 ms |
14252 KB |
Output is correct |
44 |
Correct |
129 ms |
14164 KB |
Output is correct |
45 |
Correct |
16 ms |
14280 KB |
Output is correct |
46 |
Correct |
16 ms |
14220 KB |
Output is correct |
47 |
Correct |
19 ms |
14300 KB |
Output is correct |
48 |
Correct |
138 ms |
14160 KB |
Output is correct |
49 |
Correct |
11 ms |
14164 KB |
Output is correct |
50 |
Correct |
17 ms |
14172 KB |
Output is correct |
51 |
Correct |
16 ms |
14164 KB |
Output is correct |
52 |
Correct |
14 ms |
14204 KB |
Output is correct |
53 |
Correct |
293 ms |
160840 KB |
Output is correct |
54 |
Correct |
286 ms |
160852 KB |
Output is correct |
55 |
Correct |
363 ms |
160940 KB |
Output is correct |
56 |
Correct |
370 ms |
160688 KB |
Output is correct |
57 |
Correct |
308 ms |
160836 KB |
Output is correct |
58 |
Correct |
309 ms |
160700 KB |
Output is correct |
59 |
Correct |
308 ms |
160728 KB |
Output is correct |
60 |
Correct |
382 ms |
160752 KB |
Output is correct |
61 |
Correct |
210 ms |
160736 KB |
Output is correct |
62 |
Correct |
342 ms |
160968 KB |
Output is correct |
63 |
Correct |
334 ms |
160748 KB |
Output is correct |
64 |
Correct |
288 ms |
160724 KB |
Output is correct |