제출 #983639

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
983639		shadow_sami	통행료 (IOI18_highway)	C++17	6 / 100	129 ms	47856 KiB

highway

#include<bits/stdc++.h>
#include "highway.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef vector<ll> vi;
typedef vector<vector<ll>> vvi;
typedef pair<ll,ll> pi;
typedef map<ll,ll> mi;
typedef long double ld;
typedef vector<ld> vd;
typedef vector<vector<ld>> vvd;
typedef pair<ld,ld> pd;
#define ff first
#define ss second
#define srt(a) sort(a.begin(),a.end());
#define fip(k, n) for (ll i = k; i < n; i++)
#define fjp(k, n) for (ll j = k; j < n; j++)
#define fin(k, n) for (ll i = k; i >= n; i--)
#define fjn(k, n) for (ll j = k; j >= n; j--)
#define fp(k, n, m) for (ll k = n; k < m; k++)
#define fn(k, n, m) for (ll k = n; k >= m; k--)
#define ordered_set tree<pi, null_type,less< pi >, rb_tree_tag,tree_order_statistics_node_update>
#define totalOne(n) __builtin_popcount(n)
#define backZero(n) __builtin_ctzll(n)
#define frontZero(n) __builtin_clzll(n)
#define fx(k) for ( auto x : k )
#define test ll t;cin >> t;while (t--)
#define nli "\n"

// ==========================(debug)============================================================================================== //

#ifndef ONLINE_JUDGE
#define debug(x) cerr << #x <<" "; _printn(x); cerr << nli;
#else
#define debug(x)
#endif

void _printn(ll x){ cerr<<x<<" "; }
void _printn(int x){ cerr<<x<<" "; }
void _printn(ld x){ cerr<<x<<" "; }
void _printn(double x){ cerr<<x<<" "; }
void _printn(string x){ cerr<<x<<" "; }
void _printn(char x){ cerr<<x<<" "; }
void _printn(bool x){ cerr<<x<<" "; }
template<class T,class V>void _printn(pair<T,V> vv);
template<class T> void _printn(vector<T> vv);
template<class T> void _printn(set<T> vv);
template<class T,class V> void _printn(map<T,V> vv);
template<class T> void _printn(multiset<T> vv);
template<class T,class V>void _printn(pair<T,V> vv){ cerr<<"( ";_printn(vv.ff);cerr<<",";_printn(vv.ss);cerr<<")";}
template<class T> void _printn(vector<T> vv){ cerr<<"[ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"]"; };
template<class T> void _printn(set<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T> void _printn(multiset<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T,class V> void _printn(map<T,V> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };

// ==========================(debug)============================================================================================== //

ll n,m,tp,tp2,res,cnt,sum,tptp,ans;
const ll mx = 5e5+5;
const ll mod = 1e9+7;

// ==========================(MOD)=============================================================================================== //

ll mod_add(ll aa,ll bb){ return ((aa%mod)+(bb%mod))%mod; }
ll mod_minus(ll aa,ll bb){ return (((aa%mod)-(bb%mod))+10*mod)%mod; }
ll mod_mul(ll aa,ll bb){ return ((aa%mod)*(bb%mod))%mod; }
ll mod_power(ll aa,ll bb){ aa%=mod; ll empowered = 1; bb%=mod-1; while(bb > 0){ if(bb & 1) empowered = mod_mul(empowered,aa); bb = bb >> 1; aa = mod_mul(aa,aa); } return empowered; }
ll mod_divi(ll aa,ll bb){ aa=mod_mul(aa,mod_power(bb,mod-2)); return aa; }

// ==========================(MOD)=============================================================================================== //

bool f = false;
int N,M,A,B,S,T;
vector<pi> adj[mx];
vector<int>w;
ll dis[mx];
ll timer = 0;
ll st[mx];
ll en[mx];
ll s[mx];
ll e[mx];
ll id[mx];
ll to[mx];
ll l,r,mid,pt;
ll up[mx];
bool mark[mx];

// void answer(ll a,ll b){
// 	cout<<a<<" "<<b<<nli;
// }

// void dfss(ll u,ll par){		
// 	fx(adj[u])
// 		if(x.ff!=par){			
// 			dis[x.ff] = dis[u] + (w[x.ss]?B:A);
// 			dfss(x.ff,u);
// 		}

// 	return;
// }

// ll ask(vector<int> W){
// 	fip(0,n-1)
// 		w[i] = W[i];
// 	dis[S] = 0;
// 	dfss(S,-1);	
// 	return dis[T];
// }

void dfs(ll u,ll par){	
	to[u] = par;
	s[u] = timer;
	fx(adj[u])
		if(x.ff!=par){	
			id[timer] = x.ss;
			st[timer] = u;
			en[timer] = x.ff;
			up[x.ff] = timer;
			timer++;
			dfs(x.ff,u);
		}	
	e[u] = timer-(adj[u].size()!=1);
	return;
}

ll gt_f(ll u,ll v){
	l = u;
	r = v;
	pt = 1;
	while(l<=r){
		mid = l + (r-l) / 2;
		fip(0,mid)
			w[id[i]] = 1;
		fip(mid,n-1)
			w[id[i]] = 0;			
		if(ask(w)!=res){
			if(mid)
				pt = st[mid-1];
			r = mid - 1;
		}else
		 	l = mid + 1;		
	}
	return pt;
}

ll gt_l(ll u,ll v){
	l = u;
	r = v;
	pt = tp;
	while(l<=r){
		mid = l + (r-l) / 2;
		fip(0,mid)
			w[id[i]] = 0;
		fip(mid,n-1)
			w[id[i]] = (mark[id[i]]?0:1);		
		if(ask(w)!=res){
			pt = en[mid];
			l = mid + 1;			
		}else
			r = mid - 1;		 	
	}
	return pt;
}


void find_pair(int N, vector<int> U, vector<int> V, int A, int B) {
	n = N;
	w.resize(n-1);
	fip(0,n-1){
		U[i]++;
		V[i]++;
		adj[U[i]].push_back({V[i],i});
		adj[V[i]].push_back({U[i],i});
	}
	vector<int> w(n-1,0);
	// debug(w);
	res = ask(w);	
	// debug(res);
	dfs(1,1);	
	tp = gt_f(0,n-1);
	// debug(tp);	
	tp2 = gt_l(0,n-1);
	// debug(tp2);
	tptp = tp2;
	while(tp2!=tp){
		mark[up[tp2]] = 1;
		tp2 = to[tp2];
	}
	tp = gt_l(0,n-1);	
	answer(tp-1, tptp-1);
	return;
}

// int main(){
//     ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//     #ifndef ONLINE_JUDGE
//         freopen("input1.txt", "r", stdin);
//         freopen("output1.txt", "w", stdout);
//         freopen("error1.txt", "w", stderr);
//     #endif // ONLINE_JUDGE

//         cin>>N>>M>>A>>B>>S>>T;
//         S++;
//         T++;
//         vector<int> U(N-1);
//         vector<int> V(N-1);
//         fip(0,N-1)
//         	cin>>U[i]>>V[i];
//         find_pair(N,U,V,A,B);
        
//     cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n";
//     return 0;
// }

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 6 / 6
• Subtask 4: 0 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31