Submission #70055

#	Time	Username	Problem	Language	Result	Execution time	Memory
70055		WA_TLE	Race (IOI11_race)	C++14	0 / 100	3 ms	380 KiB

race

#include<deque>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<set>
#include<cmath>
#include<tuple>
#include<string>
#include<chrono>
#include<functional>
#include<iterator>
#include<random>
#include<unordered_set>
#include<array>
#include<map>
#include<iomanip>
#include<assert.h>
#include<bitset>
#include<stack>
#include<memory>
using namespace std;
typedef long long int llint;
typedef long double lldo;
#define mp make_pair
#define mt make_tuple
#define pub push_back
#define puf push_front
#define pob pop_back
#define pof pop_front
#define fir first
#define sec second
#define res resize
#define ins insert
#define era erase
/*
cout<<setprecision(20);
cin.tie(0);
ios::sync_with_stdio(false);
*/
const llint mod=1000000000;
const llint big=2.19e15+1;
const long double pai=3.141592653589793238462643383279502884197;
const long double eps=1e-15;
template <class T,class U>bool mineq(T& a,U b){if(a>b){a=b;return true;}return false;}
template <class T,class U>bool maxeq(T& a,U b){if(a<b){a=b;return true;}return false;}
llint gcd(llint a,llint b){if(a%b==0){return b;}else return gcd(b,a%b);}
llint lcm(llint a,llint b){if(a==0){return b;}return a/gcd(a,b)*b;}
template<class T> void SO(T& ve){sort(ve.begin(),ve.end());}
template<class T> void REV(T& ve){reverse(ve.begin(),ve.end());}
template<class T>llint LBI(vector<T>&ar,T in){return lower_bound(ar.begin(),ar.end(),in)-ar.begin();}
template<class T>llint UBI(vector<T>&ar,T in){return upper_bound(ar.begin(),ar.end(),in)-ar.begin();}
//マージテク!
//重心分解!!!
//nlogn!!!!!!
int ans=869120;
int K;
vector<vector<pair<int,int>>>road;
vector<bool>used;
vector<pair<int,int>>mymap;//バージョン、道路数
vector<pair<int,int>>tuivec;//長さ、道路数
int mapban=0;
int nozen;
pair<int,int>gezyu;
vector<pair<int,int>>kizen;
int fizyu(int ter,int per){
	int kos=1,dka=0;
	if(used[ter]){return 1;}
	for(auto it:road[ter]){
		if(it.fir==per){continue;}
		int sor=fizyu(it.fir,ter);
		if(per==-1){kizen.pub(mp(it.fir,sor));}
		maxeq(dka,sor);
		kos+=sor;
	}
	maxeq(dka,nozen-kos);
	mineq(gezyu,mp(dka,ter));
	return kos;
}
void dfs(int ter,int per,int dis,int num){
	tuivec.pub(mp(dis,num));
	if(mymap[K-dis].fir==mapban){mineq(ans,num+mymap[K-dis].sec);}
	if(used[ter]){return;}
	for(auto it:road[ter]){
		if(it.fir==per||dis+it.sec>K){continue;}
		dfs(it.fir,ter,dis+it.sec,num+1);
	}
}
void solve(int ter,int zen){
	//terを含む重心を見つけて行います
	if(used[ter]){return;}
	mapban--;
	mymap[0]=mp(mapban,0);
	nozen=zen;
	gezyu=mp(869120,ter);
	fizyu(ter,-1);
	int zyu=gezyu.sec;//重心に対して何かする
	used[zyu]=1;
	for(auto it:road[zyu]){
		dfs(it.fir,zyu,it.sec,1);
		for(auto tui:tuivec){mineq(mymap[tui.fir],mp(mapban,tui.sec));}
	}
	auto myzen=kizen;
	for(auto it:myzen){solve(it.fir,it.sec);}
}
int best_path(int n,int KK,int H[][2],int L[]){
	tuivec.resize(n);
	K=KK;
	road.res(n);
	used.res(n);
	mymap.res(K+1);
	int i;
	for(i=0;i<n-1;i++){
		if(L[i]==K){return 1;}
		road[H[i][0]].pub(mp(H[i][1],L[i]));
		road[H[i][1]].pub(mp(H[i][0],L[i]));
	}
	solve(0,n);
	if(ans==869120){return -1;}
	return ans;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 22
• Subtask 4: 0 / 57