Submission #1048259

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1048259	2024-08-08T06:06:05 Z	pcc	The Big Prize (IOI17_prize)	C++17	Compilation error	0 ms	0 KB

prize

#include "prize.h"
#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace __gnu_pbds;
using namespace std;


template <typename T>
using ordered_set = tree<T,null_type,less<T>,tree_order_statistics_node_update>;
#define pii pair<int,int>
#define fs first
#define sc second

#ifdef LOCAL
const int lim = 3;
const int sq = 5;
#else
const int lim = 5000;
const int sq = 500;
#endif

const int mxn = 2e5+10;
pii dp[mxn];
int N;
int big = 1e9;
int ans = 0;
bool done = false;
int C = 0;
ordered_set<int> st;

pii req(int p){
	if(dp[p].fs != -1)return dp[p];
	C++;
	assert(C<=10000);
	auto re = ask(p);
	return (dp[p] = pii(re[0],re[1]));
}

int check(int p){
	auto re = req(p);
	if(!re.fs&&!re.sc)return 0;
	else if(N-re.fs-re.sc == big)return 2;
	else{
		st.insert(p);
		return 1;
	}
}

void dfs(int l,int r){
	if(done)return;
	cerr<<"DFS: "<<l<<','<<r<<endl;
	while(l<=r){
		if(!check(l)){
			ans = l;
			done = true;
			return;
		}
		else if(check(l) == 1){
			l++;
		}
		else break;
	}
	while(l<=r){
		if(!check(r)){
			ans = r;
			done = true;
			return;
		}
		else if(check(r) == 1){
			r--;
		}
		else break;
	}
	if(l>=r)return;
	int cnt = req(r).fs+req(l).sc-(N-big);
	if(!cnt)return;
	cerr<<"CHECK: "<<l<<','<<r<<','<<cnt<<endl;
	assert(cnt>0);
	int mid = (l+r)>>1;
	if(check(mid) == 0){
		ans = mid;
		done = true;
		return;
	}
	if(l == r)return;
	dfs(l,mid);
	dfs(mid,r);
	return;
}

int find_best(int nn) {
	N = nn;
	int pt = 0;
	for(int i = 1;i*i<2e5;i++)pt = i;
	cerr<<pt<<endl;
	for(auto &i:dp)i = pii(-1,-1);
	if(N<=lim){
		for(int i = 0;i<N;i++){
			auto tmp = req(i);
			if(!tmp.fs&&!tmp.sc)return i;
		}
		assert(false);
		return 0;
	}
	for(int i = 0;i<sq;i++){
		auto tmp = req(i);
		big = min(big,N-tmp.fs-tmp.sc);
	}
	cerr<<"BIG: "<<big<<endl;
	dfs(0,N-1);
	if(!done)exit(0);
	return ans;
}

Compilation message

prize.cpp:9:79: error: type/value mismatch at argument 4 in template parameter list for 'template<class Key, class Mapped, class Cmp_Fn, class Tag, template<class Node_CItr, class Node_Itr, class Cmp_Fn_, class _Alloc_> class Node_Update, class _Alloc> class __gnu_pbds::tree'
    9 | using ordered_set = tree<T,null_type,less<T>,tree_order_statistics_node_update>;
      |                                                                               ^
prize.cpp:9:79: note:   expected a type, got 'tree_order_statistics_node_update'
prize.cpp:29:1: error: 'ordered_set' does not name a type
   29 | ordered_set<int> st;
      | ^~~~~~~~~~~
prize.cpp: In function 'int check(int)':
prize.cpp:44:3: error: 'st' was not declared in this scope; did you mean 'sq'?
   44 |   st.insert(p);
      |   ^~
      |   sq