Submission #896411

#	Time	Username	Problem	Language	Result	Execution time	Memory
896411		Abdalaziz_Alshami	Event Hopping (BOI22_events)	C++17	Compilation error	0 ms	0 KiB

events

#include<iostream>#include<set>#include<map>#include<utility>#define st first#define ed second//#define int int64_t#define endl '\n'using namespace std;signed main(){	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);	int n,q; cin>>n>>q;	pair<int,int>a[n+1];	map<int,int>pres;	for(int i=1;i<=n;i++)	{		cin>>a[i].st>>a[i].ed;		pres[a[i].st]; pres[a[i].ed];	}	int d=1;	for(auto &e:pres) e.ed=d,d++;	set<int> m[d+10];	for(int i=1; i<=n;i++) 	{		a[i].st=pres[a[i].st];		a[i].ed=pres[a[i].ed];		m[a[i].st].insert(-a[i].ed);	}	while(q--)	{		int u,v; cin>>u>>v; 		if(u==v) {  cout<<0<<endl; continue;}		int i=a[u].st,mx=a[u].ed,g1=a[v].st,g2=a[v].ed,p=-1,ans=0;		bool f=false;		while(i<=mx)		{			auto it=m[i].lower_bound(-g2);			if(it!=m[i].end()) p=max(p,-*it);			if(i==mx){				 mx=p; ans++;				 if(mx<=g2&&i>=g1) { f=true; break;}			}			i++;		}		if(f) cout<<ans<<endl;		else  cout<<"impossible"<<endl;	}}

Compilation message (stderr)

events.cpp:1:19: warning: extra tokens at end of #include directive
    1 | #include<iostream>#include<set>#include<map>#include<utility>#define st first#define ed second//#define int int64_t#define endl '\n'using namespace std;signed main(){ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); int n,q; cin>>n>>q; pair<int,int>a[n+1]; map<int,int>pres; for(int i=1;i<=n;i++) {  cin>>a[i].st>>a[i].ed;  pres[a[i].st]; pres[a[i].ed]; } int d=1; for(auto &e:pres) e.ed=d,d++; set<int> m[d+10]; for(int i=1; i<=n;i++)  {  a[i].st=pres[a[i].st];  a[i].ed=pres[a[i].ed];  m[a[i].st].insert(-a[i].ed); } while(q--) {  int u,v; cin>>u>>v;   if(u==v) {  cout<<0<<endl; continue;}  int i=a[u].st,mx=a[u].ed,g1=a[v].st,g2=a[v].ed,p=-1,ans=0;  bool f=false;  while(i<=mx)  {   auto it=m[i].lower_bound(-g2);   if(it!=m[i].end()) p=max(p,-*it);   if(i==mx){     mx=p; ans++;     if(mx<=g2&&i>=g1) { f=true; break;}   }   i++;  }  if(f) cout<<ans<<endl;  else  cout<<"impossible"<<endl; }}
      |                   ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/crt1.o: in function `_start':
(.text+0x24): undefined reference to `main'
collect2: error: ld returned 1 exit status