Submission #988390

#	Time	Username	Problem	Language	Result	Execution time	Memory
988390		modwwe	Railway Trip 2 (JOI22_ho_t4)	C++17	52 / 100	653 ms	77140 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 icd
{
    int a,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,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();
}
struct IT{
    ib t[400007];
    int lf[100007];
    int rf[100007];

void build(int node,int l,int r)
{
     if(l==r)
     {
          t[node]={lf[l],rf[l]};
       return;
     }
     int mid=l+r>>1;
      build(node<<1,l,mid);
      build(node<<1|1,mid+1,r);
      t[node].a=min(t[node<<1].a,t[node<<1|1].a);
      t[node].b=max(t[node<<1].b,t[node<<1|1].b);
}
ib get(int node,int l,int r,int l1,int r1)
{
     if(l>r1||r<l1) return{n+1,0};
     if(l>=l1&&r<=r1) return t[node];
     int mid=l+r>>1;
      ib aa=get(node<<1,l,mid,l1,r1);
      ib ab=get(node<<1|1,mid+1,r,l1,r1);
       ab.a=min(ab.a,aa.a);
        ab.b=max(ab.b,aa.b);
         return ab;
}
}seg[20];
vector<pair<int,int>> v[100001],v2[100001];
void phongbeo()
{
     cin>>n>>k;
        cin>>m;
         for(int i=1;i<=m;i++)
         {
             cin>>l>>r;
             if(l>r)
             {
                 s2=max(l-k,r);
                 v[l].pb({r,1});
                v[s2].pb({r,-1});
                //cout<<s2,down
             }
             else
             {
                 s2=min(l+k,r);
                 v2[l].pb({r,1});
                 v2[s2].pb({r,-1});
             }
         }
         set<pair<int,int>>s;
         for(int i=1;i<=n;i++)
         {
             for(auto x:v2[i])
             {
                 if(x.second==1)s.insert(x);
                 else s.erase({x.first,1});
            }
            seg[0].rf[i]=i;
       if(!s.empty()) seg[0].rf[i]=s.rbegin()->first;
         }
         s.clear();
        for(int i=n;i>=1;--i)
              {
                  for(auto x:v[i])
                  { ///cout<<x.first<<" "<<x.second,down
                       if(x.second==1)s.insert(x);
                       else     {
                            s.erase({x.first,1});}
                  }
                  seg[0].lf[i]=i;
                  if(!s.empty()) seg[0].lf[i]=s.begin()->first;
              }
              seg[0].build(1,1,n);
              for(int i=1;i<20;i++){
                for(int j=1;j<=n;j++)
              {
                  ib s22=seg[i-1].get(1,1,n,seg[i-1].lf[j],seg[i-1].rf[j]);
                  seg[i].lf[j]=s22.a;
                  seg[i].rf[j]=s22.b;
              }
              seg[i].build(1,1,n);
              }
              cin>>m;
while(m--)
{
    cin>>l>>r;
    s2=l;
    s3=l;
    s5=1;
     for(int j=19;j>=0;--j)
     {
         ib ss4=seg[j].get(1,1,n,s2,s3);
           if(ss4.a>r||ss4.b<r)
           {
               s2=ss4.a;
               s3=ss4.b;
               s5+=(1<<j);
               ///cout<<ss4.a<<" "<<ss4.b<<" "<<r<<"cucu ",down
           }
     }
     ib ss4=seg[0].get(1,1,n,s2,s3);
     if(ss4.a>r||ss4.b<r)
     {
          cout<<-1;
     }
     else cout<<s5;
     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 member function 'void IT::build(int, int, int)':
Main.cpp:65:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |      int mid=l+r>>1;
      |              ~^~
Main.cpp: In member function 'ib IT::get(int, int, int, int, int)':
Main.cpp:75:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   75 |      int mid=l+r>>1;
      |              ~^~

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