#pragma GCC optimize("O3","unroll-loops","Ofast")
#pragma GCC target("avx2")
#include <bits/stdc++.h>
using namespace std;
const int INF=1e9;
#define pii pair<int,int>
#define endl '\n'
vector<pii> tmp;
struct seg{
int l,m,r;
int maxval=-INF,minval=INF;
int maxlz=-INF,minlz=INF;
seg *lc,*rc;
int rmax(){
return max(maxlz,maxval);
}
int rmin(){
return min(minlz,minval);
}
void pull(){
maxval=max(lc->rmax(),rc->rmax());
minval=min(lc->rmin(),rc->rmin());
}
void push(){
lc->maxlz=max(lc->maxlz,maxlz);
rc->maxlz=max(rc->maxlz,maxlz);
lc->minlz=min(lc->minlz,minlz);
rc->minlz=min(rc->minlz,minlz);
}
seg(int l1,int r1){
l=l1,r=r1;
m=(l+r)>>1;
if(r-l==1){
maxval=minval=maxlz=minlz=l1;
return;
}
lc=new seg(l,m);
rc=new seg(m,r);
pull();
}
void add(int a,int b,int x){
if(a<=l&&b>=r){
maxlz=max(maxlz,x);
minlz=min(minlz,x);
return;
}
push();
if(a<m){
lc->add(a,b,x);
}
if(b>m){
rc->add(a,b,x);
}
pull();
}
pii ask(int a,int b){
if(a<=l&&b>=r){
return {rmin(),rmax()};
}
pii ans={INF,-INF};
push();
if(a<m){
pii p=lc->ask(a,b);
if(p.first<ans.first)ans.first=p.first;
if(p.second>ans.second)ans.second=p.second;
}
if(b>m){
pii p=rc->ask(a,b);
if(p.first<ans.first)ans.first=p.first;
if(p.second>ans.second)ans.second=p.second;
}
pull();
return ans;
}
};
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
int n,k;cin>>n>>k;
vector<seg*> v(17);
for(int i=0;i<17;i++){
v[i]=new seg(0,n);
}
vector<pii> dp0(n),dp1(n);
int m;cin>>m;
for(int i=0;i<m;i++){
int a,b;cin>>a>>b;a--;b--;
if(a<b){
int c=min(a+k,b);
v[0]->add(a,c,b);
}
else{
int c=max(b+1,a-k+1);
v[0]->add(c,a+1,b);
}
}
for(int j=0;j<n;j++){
dp0[j]=v[0]->ask(j,j+1);
}
for(int i=1;i<17;i++){
for(int j=0;j<n;j++){
v[i]->add(j,j+1,dp0[j].first);
v[i]->add(j,j+1,dp0[j].second);
}
for(int j=0;j<n;j++){
int a,b;tie(a,b)=dp0[j];
dp1[j]=v[i]->ask(a,b+1);
}
dp0=dp1;
}
int q;cin>>q;
for(int i=0;i<q;i++){
int a,b;cin>>a>>b;a--;b--;
if(a<b){
int ans=0;
int l=a,r=a;
bool flag=0;
for(int j=16;j>0;j--){
int c,d;
tie(c,d)=v[j]->ask(l,r+1);
if(d<b){
ans+=(1<<(j-1));
l=c,r=d;
}
else{
flag=1;
}
}
if(flag==0){
cout<<-1<<endl;
}
else{
cout<<ans+1<<endl;
}
}
else{
int ans=0;
int l=a,r=a;
bool flag=0;
for(int j=16;j>0;j--){
int c,d;
tie(c,d)=v[j]->ask(l,r+1);
if(c>b){
ans+=(1<<(j-1));
l=c,r=d;
}
else{
flag=1;
}
}
if(flag==0){
cout<<-1<<endl;
}
else{
cout<<ans+1<<endl;
}
}
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
852 KB |
Output is correct |
2 |
Correct |
3 ms |
852 KB |
Output is correct |
3 |
Correct |
2 ms |
852 KB |
Output is correct |
4 |
Correct |
3 ms |
852 KB |
Output is correct |
5 |
Correct |
3 ms |
852 KB |
Output is correct |
6 |
Correct |
2 ms |
852 KB |
Output is correct |
7 |
Correct |
3 ms |
908 KB |
Output is correct |
8 |
Correct |
2 ms |
852 KB |
Output is correct |
9 |
Correct |
3 ms |
852 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
5 ms |
852 KB |
Output is correct |
12 |
Correct |
3 ms |
852 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
852 KB |
Output is correct |
2 |
Correct |
3 ms |
852 KB |
Output is correct |
3 |
Correct |
2 ms |
852 KB |
Output is correct |
4 |
Correct |
3 ms |
852 KB |
Output is correct |
5 |
Correct |
3 ms |
852 KB |
Output is correct |
6 |
Correct |
2 ms |
852 KB |
Output is correct |
7 |
Correct |
3 ms |
908 KB |
Output is correct |
8 |
Correct |
2 ms |
852 KB |
Output is correct |
9 |
Correct |
3 ms |
852 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
5 ms |
852 KB |
Output is correct |
12 |
Correct |
3 ms |
852 KB |
Output is correct |
13 |
Correct |
21 ms |
4616 KB |
Output is correct |
14 |
Correct |
20 ms |
4612 KB |
Output is correct |
15 |
Correct |
13 ms |
4608 KB |
Output is correct |
16 |
Correct |
15 ms |
4556 KB |
Output is correct |
17 |
Correct |
20 ms |
4612 KB |
Output is correct |
18 |
Correct |
15 ms |
4564 KB |
Output is correct |
19 |
Correct |
17 ms |
4308 KB |
Output is correct |
20 |
Correct |
14 ms |
4604 KB |
Output is correct |
21 |
Correct |
12 ms |
4604 KB |
Output is correct |
22 |
Correct |
21 ms |
4608 KB |
Output is correct |
23 |
Correct |
21 ms |
4564 KB |
Output is correct |
24 |
Correct |
21 ms |
4588 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1070 ms |
214792 KB |
Output is correct |
2 |
Correct |
1025 ms |
214796 KB |
Output is correct |
3 |
Correct |
1256 ms |
214796 KB |
Output is correct |
4 |
Correct |
1058 ms |
214792 KB |
Output is correct |
5 |
Correct |
840 ms |
214796 KB |
Output is correct |
6 |
Correct |
1066 ms |
214800 KB |
Output is correct |
7 |
Correct |
836 ms |
214800 KB |
Output is correct |
8 |
Correct |
792 ms |
212652 KB |
Output is correct |
9 |
Correct |
759 ms |
214796 KB |
Output is correct |
10 |
Correct |
1245 ms |
215056 KB |
Output is correct |
11 |
Correct |
1135 ms |
215048 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1791 ms |
215252 KB |
Output is correct |
2 |
Correct |
1492 ms |
215404 KB |
Output is correct |
3 |
Correct |
1933 ms |
215588 KB |
Output is correct |
4 |
Correct |
1269 ms |
215296 KB |
Output is correct |
5 |
Correct |
1284 ms |
213200 KB |
Output is correct |
6 |
Correct |
1259 ms |
215256 KB |
Output is correct |
7 |
Execution timed out |
2001 ms |
215420 KB |
Time limit exceeded |
8 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1770 ms |
215176 KB |
Output is correct |
2 |
Execution timed out |
2100 ms |
214912 KB |
Time limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
852 KB |
Output is correct |
2 |
Correct |
3 ms |
852 KB |
Output is correct |
3 |
Correct |
2 ms |
852 KB |
Output is correct |
4 |
Correct |
3 ms |
852 KB |
Output is correct |
5 |
Correct |
3 ms |
852 KB |
Output is correct |
6 |
Correct |
2 ms |
852 KB |
Output is correct |
7 |
Correct |
3 ms |
908 KB |
Output is correct |
8 |
Correct |
2 ms |
852 KB |
Output is correct |
9 |
Correct |
3 ms |
852 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
5 ms |
852 KB |
Output is correct |
12 |
Correct |
3 ms |
852 KB |
Output is correct |
13 |
Correct |
21 ms |
4616 KB |
Output is correct |
14 |
Correct |
20 ms |
4612 KB |
Output is correct |
15 |
Correct |
13 ms |
4608 KB |
Output is correct |
16 |
Correct |
15 ms |
4556 KB |
Output is correct |
17 |
Correct |
20 ms |
4612 KB |
Output is correct |
18 |
Correct |
15 ms |
4564 KB |
Output is correct |
19 |
Correct |
17 ms |
4308 KB |
Output is correct |
20 |
Correct |
14 ms |
4604 KB |
Output is correct |
21 |
Correct |
12 ms |
4604 KB |
Output is correct |
22 |
Correct |
21 ms |
4608 KB |
Output is correct |
23 |
Correct |
21 ms |
4564 KB |
Output is correct |
24 |
Correct |
21 ms |
4588 KB |
Output is correct |
25 |
Correct |
1070 ms |
214792 KB |
Output is correct |
26 |
Correct |
1025 ms |
214796 KB |
Output is correct |
27 |
Correct |
1256 ms |
214796 KB |
Output is correct |
28 |
Correct |
1058 ms |
214792 KB |
Output is correct |
29 |
Correct |
840 ms |
214796 KB |
Output is correct |
30 |
Correct |
1066 ms |
214800 KB |
Output is correct |
31 |
Correct |
836 ms |
214800 KB |
Output is correct |
32 |
Correct |
792 ms |
212652 KB |
Output is correct |
33 |
Correct |
759 ms |
214796 KB |
Output is correct |
34 |
Correct |
1245 ms |
215056 KB |
Output is correct |
35 |
Correct |
1135 ms |
215048 KB |
Output is correct |
36 |
Correct |
1791 ms |
215252 KB |
Output is correct |
37 |
Correct |
1492 ms |
215404 KB |
Output is correct |
38 |
Correct |
1933 ms |
215588 KB |
Output is correct |
39 |
Correct |
1269 ms |
215296 KB |
Output is correct |
40 |
Correct |
1284 ms |
213200 KB |
Output is correct |
41 |
Correct |
1259 ms |
215256 KB |
Output is correct |
42 |
Execution timed out |
2001 ms |
215420 KB |
Time limit exceeded |
43 |
Halted |
0 ms |
0 KB |
- |