Submission #405436

#	Time	Username	Problem	Language	Result	Execution time	Memory
405436		codebuster_10	Uzastopni (COCI15_uzastopni)	C++17	32 / 160	131 ms	2560 KiB

uzastopni

#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 mem0(a) memset(a, 0, sizeof(a))
#define mem1(a) memset(a, -1, 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
}
const int MAX_V = 100, MAX_N = 10000;
bitset<MAX_V> bs[MAX_N],Z;
vt<int> mx(MAX_N), mn(MAX_N);
signed main(){
  setIO();
  int n; rd(n);
  vt<int> v(n); rd(v);
  f(i,0,n) --v[i];
  vt<int> g[n];
  f(_,0,n-1){
  	int a,b; rd(a,b); --a,--b;
  	g[a].pb(b);
  }
  int ans = 0;
  f(L,0,MAX_V) f(R,L,MAX_V)	if(L <= v[0] && v[0] <= R){
  	//[L,..,R]
  	f(i,0,n){
  		bs[i] = Z;	
  		bs[i][v[i]] = 1;
  		mx[i] = mn[i] = v[i];
  	}
  	function<bool(int)> dfs=[&](int i){
  		int chk = 1;
  		for(auto j : g[i]) {
  			if(L <= v[j] && v[j] <= R){
  				if(!dfs(j)) return false;
  				chk += int(bs[j].count());
  				ckmax(mx[i],mx[j]);
  				ckmin(mn[i],mn[j]);
  				bs[i] |= bs[j];
  			}
  		}
  		
  		if(chk != bs[i].count() || chk != mx[i] - mn[i] + 1){
  			return false;
  		}
  		return true;
  	};
  	if(dfs(0) && mn[0] == L && mx[0] == R) ans++;
  }
  cout << ans << endl;
}

Compilation message (stderr)

uzastopni.cpp: In lambda function:
uzastopni.cpp:125:12: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::size_t' {aka 'long unsigned int'} [-Wsign-compare]
  125 |     if(chk != bs[i].count() || chk != mx[i] - mn[i] + 1){
      |        ~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 32 / 160