#pragma GCC target ("avx,avx2,fma")
#pragma GCC optimize ("Ofast,inline") // O1 - O2 - O3 - Os - Ofast
#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for (int i = (a); i < (b); ++i)
#define per(i, a, b) for (int i = (b) - 1; i >= (a); --i)
#define trav(a, x) for (auto &a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define pb push_back
#define debug(x) cout<<#x<<" = "<<x<<endl
#define umap unordered_map
#define uset unordered_set
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef vector<ll> vll;
typedef vector<pll> vpll;
const int INF = 1'000'000'007;
const int inf = 1e9;
struct Node {
Node *l = 0, *r = 0;
int lo, hi, mset = inf, madd = 0, val = inf;
Node(int lo,int hi):lo(lo),hi(hi){} // Large interval of -inf
Node(vi& v, int lo, int hi) : lo(lo), hi(hi) {
if (lo + 1 < hi) {
int mid = lo + (hi - lo)/2;
l = new Node(v, lo, mid); r = new Node(v, mid, hi);
val = min(l->val, r->val);
}
else val = v[lo];
}
int query(int L, int R) {
if (R <= lo || hi <= L) return inf;
if (L <= lo && hi <= R) return val;
push();
return min(l->query(L, R), r->query(L, R));
}
void set(int L, int R, int x) {
if (R <= lo || hi <= L) return;
if (L <= lo && hi <= R) mset = val = x, madd = 0;
else {
push(), l->set(L, R, x), r->set(L, R, x);
val = min(l->val, r->val);
}
}
void add(int L, int R, int x) {
if (R <= lo || hi <= L) return;
if (L <= lo && hi <= R) {
if (mset != inf) mset += x;
else madd += x;
val += x;
}
else {
push(), l->add(L, R, x), r->add(L, R, x);
val = min(l->val, r->val);
}
}
void push() {
if (!l) {
int mid = lo + (hi - lo)/2;
l = new Node(lo, mid); r = new Node(mid, hi);
}
if (mset != inf)
l->set(lo,hi,mset), r->set(lo,hi,mset), mset = inf;
else if (madd)
l->add(lo,hi,madd), r->add(lo,hi,madd), madd = 0;
}
};
int jmp[18][200005];
int main() {
cin.tie(0)->sync_with_stdio(0);
cin.exceptions(cin.failbit);
int n,q;
int heights[200005][2];
cin>>n;
/*set<int> unique_heights;
rep(i,0,n) rep(j,0,2) cin>>heights[i][j],unique_heights.insert(heights[i][j]);
umap<int,int> compress;
int cnt=0;
trav(height,unique_heights) compress[height]=cnt++;
rep(i,0,n) rep(j,0,2) heights[i][j]=compress[heights[i][j]];*/
Node segtree(0,INF);
per(i,0,n) {
jmp[0][i]=segtree.query(heights[i][0],heights[i][1]+1);
if(i+1!=n) jmp[0][i]=min(jmp[0][i],jmp[0][i+1]);
//debug(jmp[0][i])<<endl;
segtree.set(heights[i][0],heights[i][1]+1,i);
}
rep(j,1,18) rep(i,0,n) {
if(jmp[j-1][i]>=inf) jmp[j][i]=inf;
else jmp[j][i]=jmp[j-1][jmp[j-1][i]];
}
cin>>q;
while(q--) {
int lo,hi;
cin>>lo>>hi;
--lo;
int cnt=1;
//cout<<"lo = "<<lo<<" hi = "<<hi<<endl;
per(j,0,18) {
//cout<<"j = "<<j<<" lo = "<<lo<<" jmp = "<<jmp[j][lo]<<endl;
if(jmp[j][lo]<hi) {
cnt+=1<<j;
lo=jmp[j][lo];
}
}
cout<<cnt<<endl;
}
_Exit(0);
return 0;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:104:59: warning: ''target_mem_ref' not supported by dump_expr<expression error>' may be used uninitialized in this function [-Wmaybe-uninitialized]
104 | jmp[0][i]=segtree.query(heights[i][0],heights[i][1]+1);
| ~~~~~~~~~~~~^
Main.cpp:104:32: warning: ''target_mem_ref' not supported by dump_expr<expression error>' may be used uninitialized in this function [-Wmaybe-uninitialized]
104 | jmp[0][i]=segtree.query(heights[i][0],heights[i][1]+1);
| ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
96 ms |
31052 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
5 ms |
4532 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
5 ms |
4532 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
109 ms |
32180 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
96 ms |
31052 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
