//https://www.instagram.com/_modwwe/
#pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>
//#define int long long
//#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".ans","w",stdout)
#define pb push_back
#define checktime cerr << (double)clock() / CLOCKS_PER_SEC * 1000 << " ms";
using namespace std;
void phongbeo();
const ll inf=1e9;
const int mod2=1e9+7;
const int mod1=998244353;
struct icd
{
long double a;
int b;
};
struct ib
{
int a;
int b;
};
struct ic
{
int a,b,c;
};
struct id
{
int a,b,c,d;
};
struct ie
{
int a,b,c,d,e;
};
int n,m,s1,s2,s4,s3,sf,k,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,s33,dem3,l,r,mid;
int i,s10,s12;
int kk;
int el=29;
main()
{
#ifndef ONLINE_JUDGE
//fin(task),fou(task);
#endif
NHP
/// cin>>s1;
// modwwe
phongbeo();
}
ib a[200001];
int b[200001];
int st[18][200001];
vector<int> v;
void phongbeo()
{
cin>>n>>m;
for(int i=1; i<=n; i++)
{
cin>>a[i].a>>a[i].b,v.pb(a[i].a);
if(a[i].b<a[i].a) a[i].b+=m,v.pb(a[i].b);
}
sort(v.begin(),v.end());
for(int i=1; i<=n; i++)
a[i].a=lower_bound(v.begin(),v.end(),a[i].a)-v.begin()+1,
a[i].b=upper_bound(v.begin(),v.end(),a[i].b)-v.begin(),
b[a[i].a]=max(a[i].b,b[a[i].a]),
s3=max(s3,a[i].b);
for(int i=1; i<=n; i++)
b[i]=max(b[i],b[i-1]),
st[0][i]=b[i];
for(int i=1; i<18; i++)
for(int j=1; j<=n; j++)
if(st[i-1][j]>n)st[i][j]=s3;
else st[i][j]=st[i-1][st[i-1][j]];
s6=inf;
for(int i=1; i<=n; i++)
{
if(v[s3-1]-m<v[i-1])break;
s4=0;
s5=i;
for(int j=17; j>=0; --j){
if(s5>n) break;
if(v[st[j][s5]-1]-m<v[i-1])
s5=st[j][s5],
s4+=(1<<j);
}
if(s5>n)s5=s3;
else s5=st[0][s5];
s4++;
if(v[s5-1]-m>=v[i-1])s6=min(s6,s4);
}
if(s6==inf) cout<<-1;
else
cout<<s6;
}
Compilation message
Main.cpp:19:7: error: 'll' does not name a type
19 | const ll inf=1e9;
| ^~
Main.cpp:51:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
51 | main()
| ^~~~
Main.cpp: In function 'void phongbeo()':
Main.cpp:86:8: error: 'inf' was not declared in this scope; did you mean 'ynf'?
86 | s6=inf;
| ^~~
| ynf
