Submission #1008999

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008999		modwwe	Fountain (eJOI20_fountain)	C++17	100 / 100	109 ms	31520 KiB

fountain

//https://www.instagram.com/_modwwe/
#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2")
#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 "test"
#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 inf=1e18;
const int mod2=1e9+7;
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,f;

};
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;
int el=29;
main()
{
#ifndef ONLINE_JUDGE
///     fin(task),fou(task);
#endif
    NHP
    /// cin>>s1;
    // modwwe
    phongbeo(),down
}
int bit[100001];
ib st[17][100001];
ib a[100001];
 vector<int> v;
 void upd(int x,int y)
 {
     for(x;x;x-=x&-x) bit[x]=y;
 }
 int get(int x)
 {
     int s=n+1;
      for(x;x<=n;x+=x&-x) s=min(s,bit[x]);
  return s;
 }
 void setup()
 {
      for(int i=n;i>=1;--i)
      { a[i].a=lower_bound(v.begin(),v.end(),a[i].a)-v.begin()+1;
          s2=get(a[i].a+1);
          st[0][i].a=s2;
           st[0][i].b=a[i].b;
       upd(a[i].a,i);}
 }
void phongbeo()
{
     cin>>n>>m;
      for(int i=1;i<=n;i++)
         cin>>a[i].a>>a[i].b,bit[i]=n+1,v.pb(a[i].a);
          sort(v.begin(),v.end());
setup();
st[0][n+1]={n+1,0};
for(int i=1;i<17;i++)
    for(int j=1;j<=n;j++)
    st[i][j].a=st[i-1][st[i-1][j].a].a,
    st[i][j].b=st[i-1][j].b+st[i-1][st[i-1][j].a].b;
while(m--)
{
     cin>>l>>r ;
      for(int i=16;i>=0;--i)
        if(st[i][l].b<r)
      {
          r-=st[i][l].b;
           l=st[i][l].a;
           if(l==n+1)
           {
               break;
           }
      }
      if(l==n+1) cout<<0;
 else cout<<l;
  down
}

}

Compilation message (stderr)

fountain.cpp:47:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   47 | main()
      | ^~~~
fountain.cpp: In function 'void upd(long long int, long long int)':
fountain.cpp:63:10: warning: statement has no effect [-Wunused-value]
   63 |      for(x;x;x-=x&-x) bit[x]=y;
      |          ^
fountain.cpp: In function 'long long int get(long long int)':
fountain.cpp:68:11: warning: statement has no effect [-Wunused-value]
   68 |       for(x;x<=n;x+=x&-x) s=min(s,bit[x]);
      |           ^

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40