/*
In the name of Allah
made by: Ahmed_Solyman
*/
#include <bits/stdc++.h>
#include <ext/rope>
using namespace std;
using namespace __gnu_cxx;
#pragma GCC optimize("-Ofast")
#pragma GCC optimize("-O1")
//-------------------------------------------------------------//
typedef long long ll;
typedef unsigned long long ull;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define PI acos(-1)
#define lb lower_bound
#define ub upper_bound
#define endl '\n'
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define sum_to(n) (n*(n+1))/2
#define pb push_back
#define pf push_front
#define fil(arr,x) memset(arr,x,sizeof(arr))
const ll mod=1e9+7;
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,1,-1,-1,1};
//-------------------------------------------------------------//
ll lcm(ll a,ll b)
{
return (max(a,b)/__gcd(a,b))*min(a,b);
}
void person_bool(bool x)
{
cout<<(x?"YES":"NO")<<endl;
}
const int N=2e5+5;
int l[N],r[N],dp[N][21],Log[N],l2[N],r2[N];
struct wavelet_tree{
#define vi vector<int>
#define pb push_back
int lo, hi;
wavelet_tree *l, *r;
vi b;
//nos are in range [x,y]
//array indices are [from, to)
wavelet_tree(int *from, int *to, int x, int y){
lo = x, hi = y;
if(lo == hi or from >= to) return;
int mid = (lo+hi)/2;
auto f = [mid](int x){
return x <= mid;
};
b.reserve(to-from+1);
b.pb(0);
for(auto it = from; it != to; it++)
b.pb(b.back() + f(*it));
//see how lambda function is used here
auto pivot = stable_partition(from, to, f);
l = new wavelet_tree(from, pivot, lo, mid);
r = new wavelet_tree(pivot, to, mid+1, hi);
}
//kth smallest element in [l, r]
int kth(int l, int r, int k){
if(l > r) return 0;
if(lo == hi) return lo;
int inLeft = b[r] - b[l-1];
int lb = b[l-1]; //amt of nos in first (l-1) nos that go in left
int rb = b[r]; //amt of nos in first (r) nos that go in left
if(k <= inLeft) return this->l->kth(lb+1, rb , k);
return this->r->kth(l-lb, r-rb, k-inLeft);
}
//count of nos in [l, r] Less than or equal to k
int LTE(int l, int r, int k) {
if(l > r or k < lo) return 0;
if(hi <= k) return r - l + 1;
int lb = b[l-1], rb = b[r];
return this->l->LTE(lb+1, rb, k) + this->r->LTE(l-lb, r-rb, k);
}
//count of nos in [l, r] equal to k
int count(int l, int r, int k) {
if(l > r or k < lo or k > hi) return 0;
if(lo == hi) return r - l + 1;
int lb = b[l-1], rb = b[r], mid = (lo+hi)/2;
if(k <= mid) return this->l->count(lb+1, rb, k);
return this->r->count(l-lb, r-rb, k);
}
~wavelet_tree(){
delete l;
delete r;
}
};
int main()
{
//freopen("input.txt","r",stdin);
//freopen("output.txt","w",stdout);
#ifndef ONLINE_JUDGE
freopen("input.in", "r", stdin);
freopen("output.out", "w", stdout);
#endif
fast
Log[1]=0;
for(int i=2;i<N;i++)Log[i]=Log[i/2]+1;
int n;cin>>n;
for(int i=1;i<=n;i++){
cin>>l[i]>>r[i];
l2[i]=l[i];
r2[i]=r[i];
}
wavelet_tree w1(l2+1,l2+n+1,1,1e9);
int q;cin>>q;
while(q--){
int a,b;cin>>a>>b;
if(a==b){
cout<<1<<endl;
continue;
}
int ans=1;
for(int j=20;j>=0;j--){
if(dp[a][j]<=b){
a=dp[a][j];
ans+=j+1;
}
}
cout<<ans<<endl;
}
return 0;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:104:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
104 | freopen("input.in", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:105:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
105 | freopen("output.out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
6 ms |
9052 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
