Submission #988245

#	Time	Username	Problem	Language	Result	Execution time	Memory
988245		modwwe	Railway Trip 2 (JOI22_ho_t4)	C++17	0 / 100	2106 ms	97964 KiB

Main

#include<bits/stdc++.h>
///#define int long long
//#define ll long long
#define down cout<<'\n';
#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 "teamwork"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".out","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
void phongbeo();
const int mod2=998244353;
const int  mod1=998244353;
struct ib
{
    int a;
    int b;
};
struct icd
{
    int a,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,r,mid,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,l;
int  i,s10,s12,c;
int el=29;
main()
{
///#ifndef ONLINE_JUDGE
  ///  fin(task),fou(task);
///#endif
    NHP
   /// cin>>s1;
   /// modwwe
    phongbeo();
}
ib lazy[17][400001];
ib t[17][400001];
ib  st[17][100001];
void build(int node,int l,int r)
{
    for(int f=0;f<17;f++){
    lazy[f][node].a=n+1;
lazy[f][node].b=0;}
    if(l==r){
            for(int f=0;f<17;f++){
            t[f][node].a=l;
    t[f][node].b=r;}
    return;
    }
    int mid=l+r>>1;
    build(node<<1,l,mid),build(node<<1|1,mid+1,r);
                for(int f=0;f<17;f++){

    t[f][node].a=min(t[f][node<<1].b,t[f][node<<1|1].a);
     t[f][node].b=max(t[f][node<<1].b,t[f][node<<1|1].b);
     }
}
void ff(int x,int f)
{
     for(int i=x*2;i<=x*2+1;i++)
        t[f][i].a=min(t[f][i].a,lazy[f][x].a),
        t[f][i].b=max(t[f][i].b,lazy[f][x].b),
        lazy[f][i].a=min(lazy[f][i].a,lazy[f][x].a),
        lazy[f][i].b=max(lazy[f][i].b,lazy[f][x].b);

}
void upd(int node,int l,int r,int l1,int r1,int c,int e,int f)
{
     if(l>r1||r<l1) return;
 if(l>=l1&&r<=r1)
 {
      if(e==0) t[f][node].a=min(t[f][node].a,c),lazy[f][node].a=min(lazy[f][node].a,c);
  if(e==1) t[f][node].b=max(t[f][node].b,c),lazy[f][node].b=max(lazy[f][node].b,c);
 return; }
 int mid=l+r>>1;
 ff(node,f);
  upd(node<<1,l,mid,l1,r1,c,e,f);
  upd(node<<1|1,mid+1,r,l1,r1,c,e,f);
    t[f][node].a=min(t[f][node<<1].b,t[f][node<<1|1].a);
     t[f][node].b=max(t[f][node<<1].b,t[f][node<<1|1].b);
}
void setup(int node,int l,int r,int f)
{
     if(l==r)
     { st[0][l]=t[0][node];
         return;
     }
     int mid=l+r>>1;
      ff(node,f);
      setup(node<<1,l,mid,f);
      setup(node<<1|1,mid+1,r,f);
}
int get(int node,int l,int r,int l1,int r1,int f,int c)
{ ///cout<<c,down
     if(l>r1||r<l1)
     {
          if(c==0)return n+1;
          if(c==1) return 0;
     }
     if(l>=l1&&r<=r1)
     {
          if(c==0)return t[f][node].a;
            if(c==1) return t[f][node].b;
     }
     int mid=l+r>>1;
      ff(node,f);
      if(c==0) return min(get(node<<1,l,mid,l1,r1,f,c),get(node<<1|1,mid+1,r,l1,r1,f,c));
      else return max(get(node<<1,l,mid,l1,r1,f,c),get(node<<1|1,mid+1,r,l1,r1,f,c));
}
void phongbeo()
{
     cin>>n>>k;
      cin>>m;
      build(1,1,n);
       for(int i=1;i<=m;i++)
       {
            cin>>l>>r;
 if(l>r)
 {
     s2=max(l-k+1,r);
     upd(1,1,n,s2,l,r,0,0);
 }
 else
 {
      s2=min(l+k-1,r);
       upd(1,1,n,l,s2,r,1,0);
 }
       }
       setup(1,1,n,0);
       for(int j=1;j<17;j++)
        for(int i=1;i<=n;i++)
       {
           st[j][i].a=min(get(1,1,n,i,st[j-1][i].b,j-1,0),get(1,1,n,st[j-1][i].a,i,j-1,0));
           st[j][i].b=max(get(1,1,n,i,st[j-1][i].b,j-1,1),get(1,1,n,st[j-1][i].a,i,j-1,1));
       /// if(j==1&&i==3) cout<<st[1][3].b<<" "<<get(1,1,n,st[j-1][i].a,i,j-1,1)<<" "<<st[j-1][i].a<<" "<<i;
        upd(1,1,n,i,i,st[j][i].a,0,j);
        upd(1,1,n,i,i,st[j][i].b,1,j);
       }
        cin>>m;
         while(m--)
         {
              cin>>l>>r;
              s2=0;
              s3=l;
            for(int j=16;j>=0;--j)
            {
 if(l<r)
 {s4=get(1,1,n,l,s3,j,1);
     if(s4<r ){
            s3=s4;
            s2=s2+(1<<j);}
            else
                if(s4==s3)
            {
                 s4=get(1,1,n,l,s3,j,0);
                 l=s4;
                 s2+=(1<<j);
            }
 }
 else
 {s4=get(1,1,n,s3,l,j,0);
     if(s4>r&&s4!=s3){
            s3=s4;
            s2=s2+(1<<j);}
            else
            { ///if(r==2&&
                 if(s4==s3)
                 { ///if(r==2) cout<<1,down
                     s4=get(1,1,n,s3,l,j,1);
                     l=s4;
                     s2=s2+(1<<j);

                 }
            }
 }
            }
if(l<r)
{
    s4=get(1,1,n,l,s3,0,1);
    if(s4<r){cout<<-1; }
    else cout<<s2+1;
}
else
{  ///if(r==2)
   /// cout<<s3<<" "<<s2<<" "<<get(1,1,n,s3,l,0,0)<<" "<<l,down
     s4=get(1,1,n,s3,l,0,0);
     if(s4>r){cout<<-1;}
     else cout<<s2+1;
}
down
   }
}

Compilation message (stderr)

Main.cpp:43:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   43 | main()
      | ^~~~
Main.cpp: In function 'void build(int, int, int)':
Main.cpp:67:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   67 |     int mid=l+r>>1;
      |             ~^~
Main.cpp: In function 'void upd(int, int, int, int, int, int, int, int)':
Main.cpp:92:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   92 |  int mid=l+r>>1;
      |          ~^~
Main.cpp: In function 'void setup(int, int, int, int)':
Main.cpp:105:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  105 |      int mid=l+r>>1;
      |              ~^~
Main.cpp: In function 'int get(int, int, int, int, int, int, int)':
Main.cpp:122:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  122 |      int mid=l+r>>1;
      |              ~^~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 8
• Subtask 3: 0 / 11
• Subtask 4: 0 / 25
• Subtask 5: 0 / 35
• Subtask 6: 0 / 13