Submission #419056

#	Time	Username	Problem	Language	Result	Execution time	Memory
419056		codebuster_10	Bitaro’s Party (JOI18_bitaro)	C++17	7 / 100	2103 ms	251184 KiB

bitaro

#include <bits/stdc++.h>
 
using namespace std ;
 
#define int int64_t //be careful about this 
#define endl "\n"
#define f(i,a,b) for(int i=int(a);i<int(b);++i)
 
#define pr pair
#define ar array
#define fr first
#define sc second
#define vt vector
#define pb push_back
#define eb emplace_back
#define LB lower_bound  
#define UB upper_bound
#define PQ priority_queue
 
#define sz(x) ((int)(x).size())
#define all(a) (a).begin(),(a).end()
#define allr(a) (a).rbegin(),(a).rend()
#define mem(a,b) memset(a, b, sizeof(a))
 
template<class A> void rd(vt<A>& v);
template<class T> void rd(T& x){ cin >> x; }
template<class H, class... T> void rd(H& h, T&... t) { rd(h) ; rd(t...) ;}
template<class A> void rd(vt<A>& x) { for(auto& a : x) rd(a) ;}
 
template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
 
template<typename T>
void __p(T a) {
  cout<<a; 
}
template<typename T, typename F>
void __p(pair<T, F> a) {
  cout<<"{";
  __p(a.first);
  cout<<",";
  __p(a.second);
  cout<<"}\n"; 
}
template<typename T>
void __p(std::vector<T> a) {
  cout<<"{";
  for(auto it=a.begin(); it<a.end(); it++)
    __p(*it),cout<<",}\n"[it+1==a.end()]; 
}
template<typename T, typename ...Arg>
void __p(T a1, Arg ...a) {
  __p(a1);
  __p(a...);
}
template<typename Arg1>
void __f(const char *name, Arg1 &&arg1) {
  cout<<name<<" : ";
  __p(arg1);
  cout<<endl;
}
template<typename Arg1, typename ... Args>
void __f(const char *names, Arg1 &&arg1, Args &&... args) {
  int bracket=0,i=0;
  for(;; i++)
    if(names[i]==','&&bracket==0)
      break;
    else if(names[i]=='(')
      bracket++;
    else if(names[i]==')')
      bracket--;
  const char *comma=names+i;
  cout.write(names,comma-names)<<" : ";
  __p(arg1);
  cout<<" | ";
  __f(comma+1,args...);
}
 
void setIO(string s = "") {
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); 
  cin.exceptions(cin.failbit); 
	cout.precision(15);	cout << fixed;
  #ifdef ONLINE_JUDGE
  if(sz(s)){
  	freopen((s+".in").c_str(),"r",stdin);
  	freopen((s+".out").c_str(),"w",stdout);
  }
  #define __f(...) 0
  #endif
}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
#undef int 
 
 
 
const int MAX_N = 100000, B = 317, inf = 1e9;
pr<int,int> dis[MAX_N][B]; // 0 -> dis, 1 -> index
bool rem[MAX_N];
int dp[MAX_N];
pr<int,int> tmp[B];
vt<pr<int,int>> help;

// merge as if(a.fr != b.fr) a.fr < b.fr else a.sc < b.sc;

void check(pr<int,int> a[B]){
	f(i,0,B-1){
		assert(a[i].fr >= a[i+1].fr);
		if(a[i].fr == a[i+1].fr) assert(a[i].sc >= a[i+1].sc);
	}
	return;
}


void merge(pr<int,int> a[B], pr<int,int> b[B]){
	//check(a);
	//check(b);
  
  unordered_map<int,int> mp;
	f(i,0,B) tmp[i] = {-inf,-1};
	
	f(i,0,B){
		if(a[i].sc != -1){
			ckmax(mp[a[i].sc],a[i].fr);
		}
		if(b[i].sc != -1){
			ckmax(mp[b[i].sc],b[i].fr);
		}
	}
	
	vt<pr<int,int>> brute;
	for(auto [u,v] : mp){
		brute.pb({v,u});
	} 
	
	sort(allr(brute));
	
	f(i,0,min(B,sz(brute))){
		tmp[i] = brute[i];
	}
	
	/*

  int x = 0, y = 0, z = 0;
  
  while(z < B){
  	if(a[x].sc == -1 && b[y].sc == -1) break;
  	
  	if(a[x].fr == b[y].fr){
  		if(a[x].sc == b[y].sc){
  			tmp[z++] = a[x++] = b[y++];
  		}else{
  			if(a[x].sc > b[y].sc){
  				tmp[z++] = a[x++];
  			}else{
  				tmp[z++] = b[y++];
  			}
  		}
  	}else{
  		if(a[x].fr > b[y].fr){
  			tmp[z++] = a[x++];
  		}else{
  			tmp[z++] = b[y++];
  		}
  		
  	}
  }
  check(tmp);*/
  return;
}

signed main(){
  setIO();
  f(i,0,MAX_N) f(j,0,B) dis[i][j] = {-inf,-1};
  mem(rem,false);
  
  int N,M,Q;
  rd(N,M,Q);
  vt<int> g[N];
  f(_,0,M){
  	int u,v; rd(u,v); --u,--v;
  	g[v].pb(u);
  }

  f(i,0,N){
  	help.clear();
  	help.pb({0,i});
  	for(auto j : g[i]){
  		f(k,0,B) if(dis[j][k].sc != -1) help.pb({dis[j][k].fr + 1, dis[j][k].sc});
  	}
  	sort(all(help));
  	set<int> done;
  	for(int j = 0; j < B && sz(help) > 0; ++j){
  		if(!done.count(help.back().sc)){
  			dis[i][j] = help.back();
  			done.insert(help.back().sc);
  		}else{
  			--j;
  		}
  		help.pop_back();
  	}
  }
	
	// f(i,0,N){
		// __f("i",i);
		// f(j,0,10){
			// cout << dis[i][j].sc  << ' ';
		// }
		// cout << endl;
	// }
//   
  // exit(0);
  f(_,0,Q){
  	int T,Y; rd(T,Y); --T;
  	vt<int> C(Y);
  	for(auto& i : C) cin >> i, --i;
 
  	for(auto& i : C) rem[i] = true;
  	
  	if(Y < B){
  		bool done = false;
  		f(i,0,B){
  			if(dis[T][i].sc != -1 && !rem[dis[T][i].sc]){
  				cout << dis[T][i].fr << endl;
  				done = true; break;
  			}
  		}
  		if(!done)	cout << -1 << endl;
  	}else{
  		f(i,0,N) dp[i] = -inf;
  		dp[T] = 0;
  		for(int i = T; i >= 0; --i){
  			for(auto j : g[i]){
  				ckmax(dp[j],dp[i]+1);
  			}
  		}
  		int ans = -1;
  		f(i,0,N){
  			if(!rem[i]) ckmax(ans,dp[i]);
  		}
  		cout << ans << endl;
  	}
  	for(auto& i : C) rem[i] = false;
  }
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 86