#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << " " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << " " << j << " " << #i << " " << q << " " << #p << endl;
#define show4(x,y) for(auto it:y) cout << it << " "; cout << #x << endl;
typedef pair<long long,long long>pii;
typedef pair<int,pii>pi2;
mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
pii arr[305];
int n;
int memo[305][305];
inline pair<pii,pii> combine(pair<pii,pii> a, pair<pii,pii> b){
pii temp=min(make_pair(a.first.first,-a.first.second),make_pair(b.first.first,-b.first.second));
temp.second=-temp.second;
pii temp2=max(make_pair(a.second.second,-a.second.first),make_pair(b.second.second,-b.second.first));
temp2.second=-temp2.second;
swap(temp2.first,temp2.second);
return {temp,temp2};
}
struct node{
int s,e,m;
node *l,*r;
pair<pii,pii>v;
node(int ss, int ee):s(ss),e(ee),m((s+e)>>1){
v={{0,0},{0,0}};
if(s!=e){
l=new node(s,m);
r=new node(m+1,e);
}
}
void upd(int x, pii y){
if(s==e){
v={y,y};
return;
}
if(x<=m) l->upd(x,y);
else r->upd(x,y);
v=combine(l->v,r->v);
}
pair<pii,pii> query(int x, int y){
if(x<=s&&y>=e){
return v;
}
if(y<=m) return l->query(x,y);
if(x>m) return r->query(x,y);
return combine(l->query(x,m),r->query(m+1,y));
}
};
node st(0,2505);
int dp(int l, int r){
if(l==1&&r==n) return 0;
if(memo[l][r]!=-1) return memo[l][r];
int ans=1e15;
//show2(l,l,r,r);
pair<pii,pii>hold=st.query(l,r);
//show2(hold.first.first,hold.first.first,hold.first.second,hold.first.second);
//show2(hold.second.first,hold.second.first,hold.second.second,hold.second.second);
if(hold.first.first<l){
ans=min(ans,dp(hold.first.first,max(r,hold.first.second))+1);
}
if(hold.second.second>r){
ans=min(ans,dp(min(l,hold.second.first),hold.second.second)+1);
}
return memo[l][r]=ans;
}
void solve(){
cin >> n;
for(int x=1;x<=n;x++){
cin >> arr[x].first >> arr[x].second;
st.upd(x,arr[x]);
}
int q;
cin >> q;
int temp;
memset(memo,-1,sizeof(memo));
for(int x=0;x<q;x++){
cin >> temp;
int hold=dp(arr[temp].first,arr[temp].second);
if(hold>1e12){
cout << -1 << "\n";
}
else cout << hold+1 << "\n";
}
}
int32_t main(){
ios::sync_with_stdio(0);
cin.tie(0);
int t=1;
//freopen("in.txt","r",stdin);
//cin >> t;
while(t--){
solve();
}
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 4 |
Runtime error |
1 ms |
1372 KB |
Execution killed with signal 11 |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1624 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1368 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1628 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1624 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1368 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 16 |
Runtime error |
2 ms |
1368 KB |
Execution killed with signal 11 |
| 17 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1624 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1368 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 16 |
Runtime error |
2 ms |
1368 KB |
Execution killed with signal 11 |
| 17 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 4 |
Runtime error |
1 ms |
1372 KB |
Execution killed with signal 11 |
| 5 |
Halted |
0 ms |
0 KB |
- |
