#pragma GCC optimize("Ofast")
#pragma GCC optimize("O2,O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
//#define int long long
//#define ll long long
#define fi first
#define se second
#define pb push_back
#define all(lmao) lmao.begin(), lmao.end()
using namespace std;
typedef pair<int,int> pii;
//typedef tuple<int,int,int> tp;
const int N = 1e6 + 5;
//const int mod = 1e9 + 7;
const int oo = 1e8;
int n, L[N], R[N], h[N << 2], id[N], f[N << 2];
vector<pii> p[N << 2];
void build(int i,int l,int r){
if(l == r){
id[l] = i;
h[i] = 1;
return;
}
int mid = (l + r) / 2;
build(i << 1, l, mid);
build(i << 1|1, mid + 1, r);
p[i << 1].pb({i, 0});
p[i << 1|1].pb({i, 0});
}
void update(int i,int l,int r,int u,int v,int x){
if(l > r || l > v || r < u) return;
if(u <= l && r <= v){
p[i].pb({id[x], 1});
return;
}
int mid = (l + r) / 2;
update(i << 1, l, mid, u, v, x);
update(i << 1|1, mid + 1, r, u, v, x);
}
int d[N << 2][5];
void cal(int u,int j){
for(int i = 1; i <= 4 * n; i ++) d[i][j] = oo;
d[id[u]][j] = 0;
queue<int> q; q.push(id[u]);
while(!q.empty()){
int u = q.front();
q.pop();
for(auto [v, w] : p[u]) if(d[u][j] + w < d[v][j]){
d[v][j] = d[u][j] + w;
q.push(v);
}
}
}
signed main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define task "v"
if(fopen(task ".inp","r")){
freopen(task ".inp","r",stdin);
freopen(task ".out","w",stdout);
}
cin >> n;
build(1, 1, n);
for(int i = 1; i <= n; i ++){
cin >> L[i] >> R[i];
update(1, 1, n, L[i], R[i], i);
}
cal(1, 0);
// cal(n, 1);
queue<pii> pq;
for(int i = 1; i <= 4 * n; i ++){
if(id[1] == i || id[n] == i) f[i] = d[i][1] + d[i][0];
else f[i] = d[i][1] + d[i][0] - h[i];
// pq.push({f[i], i});
}
// while(!pq.empty()){
// int w = pq.front().fi;
// int u = pq.front().se;
// pq.pop();
// if(w > f[u]) continue;
// for(auto [v, g] : p[u]) if(w + g < f[v]) pq.push({f[v] = w + g, v});
// }
int q;
cin >> q;
while(q--){
int x; cin >> x;
cout << (f[id[x]] >= oo ? -1 : f[id[x]]) << "\n";
}
}
Compilation message
passport.cpp: In function 'int main()':
passport.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
71 | freopen(task ".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
passport.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
72 | freopen(task ".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
31 ms |
103000 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
27 ms |
103000 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
27 ms |
103000 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
27 ms |
103000 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
31 ms |
103000 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |