oj.uz

Submission #887901

# Submission time Handle Problem Language Result Execution time Memory
887901 2023-12-15T12:48:52 Z airths Regions (IOI09_regions) C++17
1 / 100
 2497 ms 47556 KB 
/*
 * 
 * 	^v^
 * 
 */
#include <iostream>
#include <numeric>
#include <set>
#include <iomanip>
#include <chrono>
#include <queue>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <bitset>
#include <algorithm>
#include <array>
#include <random>

using namespace std;

using ll = long long int;
using ld = long double;

#define iamtefu ios_base::sync_with_stdio(false); cin.tie(0);
#define fl(i,a,n) for (ll i{a}; i<n; i++)
#define rfl(i,a,n) for (ll i{n-1}; i>=a; i--)
#define ty int _; for(cin>>_; _--;)
#define print(a) for(auto ele:a){cout<<ele<<" ";}cout<<'\n';
#define all(x) x.begin(), x.end()

template <typename L, typename R>
inline bool chmax(L &a, R b){if (a<b){a=b;return 1;}return 0;}
template <typename L, typename R>
inline bool chmin(L &a, R b){if (a>b){a=b;return 1;}return 0;}

template <typename L, typename R>
ostream& operator<<(ostream &fout, const pair<L, R> &p){
	fout<<"{"<<p.first<<","<<p.second<<"}";
	return fout;
}

template <typename T>
ostream& operator<<(ostream &fout, const vector <T> &v){
	for (auto &x:v){
		fout<<x<<" ";
	}
	fout<<"\n";
	return fout;
}

template <typename T>
ostream& operator<<(ostream &fout, const set <T> &st){
	for (auto &x:st){
		fout<<x<<" ";
	}
	fout<<"\n";
	return fout;
}

template <typename T>
ostream& operator<<(ostream &fout, const multiset <T> &st){
	for (auto &x:st){
		fout<<x<<" ";
	}
	fout<<"\n";
	return fout;
}

template <typename K, typename V>
ostream& operator<<(ostream &fout, const map<K, V> &mp){
	fout<<"[";
	for (auto &[x,y]:mp){
		fout<<x<<":"<<y<<" ";
	}
	fout<<"]\n";
	return fout;
}

ll gcd(ll a, ll b){
	if (b==0){
		return a;
	}
	return gcd(b, a%b);
}

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

ll pw(ll a, ll b, ll m){
	ll res=1;
	a%=m;
	while (b){
		if (b&1){
			res=(res*a)%m;
		}
		a=(a*a)%m;
		b/=2;
	}
	return res;
}

void scn(){
	ll n, r, q; cin>>n>>r>>q;
	vector <vector <ll>> ed(n+1);
	vector <ll> reg(n+1);
	fl(i,0,n){
		ll x;
		if (i==0){
			cin>>x;
			reg[i+1]=x;
		} else {
			ll u; cin>>x>>u;
			reg[i+1]=u;
			ed[x].push_back(i+1);
			ed[i+1].push_back(x);
		}
	}
	vector <ll> vis(n+1), arr;
	vector <vector <ll>> rg(r+1), emp(r+1);
	auto dfs=[&](const auto &self, ll i)->void{
		vis[i]++;
		arr.push_back(reg[i]);
		emp[reg[i]].push_back(arr.size());
		rg[reg[i]].push_back(0);
		ll ino = rg[reg[i]].size()-1;
		for (auto x:ed[i]){
			if (!vis[x]){
				self(self, x);
			}
		}
		rg[reg[i]][ino]=(arr.size());
	};
	dfs(dfs, 1);
	vector <vector <ll>> pre;
	vector <ll> ind(r+1, -1);
	ll c = ((ll)sqrtl(n));
	fl(i,1,r+1){
		if ((ll)rg[i].size()>=c){
			ind[i]=pre.size();
			pre.push_back(vector <ll>(r+1, 0));
			vector <ll> art(n+2, 0);
			fl(j,0,(ll)rg[i].size()){
				art[emp[i][j]]++;
				art[rg[i][j]+1]--;
			}
			fl(j,1,n+2){
				art[j]+=art[j-1];
				pre[ind[i]][arr[j-1]]+=art[j];
			}
		}
	}
	fl(i,0,q){
		ll r1, r2; cin>>r1>>r2;
		if (ind[r1]!=-1){
			cout<<pre[ind[r1]][r2]<<'\n';
			cout.flush();
		} else {
			ll co = 0;
			// cout<<"Here\n";
			// cout<<rg[r1]<<rg[r2]<<emp[r1]<<emp[r2];
			fl(j,0,(ll)rg[r1].size()){
				co+=(upper_bound(emp[r2].begin(), emp[r2].end(), rg[r1][j]-1)-lower_bound(emp[r2].begin(), emp[r2].end(), emp[r1][j]));
			}
			cout<<co<<'\n';
			cout.flush();
		}
	}

	// not necessarily distinct
	// right down
}

int main(){
	iamtefu;
#if defined(airths)
	auto t1=chrono::high_resolution_clock::now();
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
	// ty
	{
		scn();
	}
#if defined(airths)
	auto t2=chrono::high_resolution_clock::now();
	ld ti=chrono::duration_cast<chrono::nanoseconds>(t2-t1).count();
	ti*=1e-6;
	cerr<<"Time: "<<setprecision(12)<<ti;
	cerr<<"ms\n";
#endif
	return 0;
}

Subtask #1
1.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 0 ms 344 KB Output isn't correct
3 Incorrect 1 ms 344 KB Output isn't correct
4 Incorrect 2 ms 344 KB Output isn't correct
5 Incorrect 3 ms 344 KB Output isn't correct
6 Incorrect 10 ms 600 KB Output isn't correct
7 Incorrect 13 ms 600 KB Output isn't correct
8 Incorrect 18 ms 704 KB Output isn't correct
9 Incorrect 22 ms 1368 KB Output isn't correct
10 Incorrect 39 ms 1568 KB Output isn't correct
11 Incorrect 61 ms 2072 KB Output isn't correct
12 Incorrect 73 ms 2932 KB Output isn't correct
13 Incorrect 99 ms 3028 KB Output isn't correct
14 Incorrect 135 ms 4052 KB Output isn't correct
15 Incorrect 184 ms 8028 KB Output isn't correct

Subtask #2
0 / 85.0

# Verdict Execution time Memory Grader output
1 Incorrect 1113 ms 9812 KB Output isn't correct
2 Incorrect 1425 ms 9712 KB Output isn't correct
3 Incorrect 1820 ms 13036 KB Output isn't correct
4 Incorrect 143 ms 4112 KB Output isn't correct
5 Incorrect 214 ms 6636 KB Output isn't correct
6 Incorrect 301 ms 10440 KB Output isn't correct
7 Incorrect 697 ms 13412 KB Output isn't correct
8 Incorrect 629 ms 25112 KB Output isn't correct
9 Incorrect 1358 ms 19416 KB Output isn't correct
10 Incorrect 1865 ms 47556 KB Output isn't correct
11 Incorrect 2497 ms 24236 KB Output isn't correct
12 Incorrect 712 ms 22496 KB Output isn't correct
13 Incorrect 1088 ms 23940 KB Output isn't correct
14 Incorrect 1297 ms 28196 KB Output isn't correct
15 Incorrect 1870 ms 29920 KB Output isn't correct
16 Incorrect 2043 ms 38452 KB Output isn't correct
17 Incorrect 1891 ms 40124 KB Output isn't correct