Submission #760514

#	Time	Username	Problem	Language	Result	Execution time	Memory
760514		shadow_sami	Toll (BOI17_toll)	C++17	100 / 100	351 ms	101184 KiB

toll

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef vector<ll> vi;
typedef vector<vector<ll>> vvi;
typedef pair<ll,ll> pi;
#define ff first
#define ss second
#define fip(a,b) for(ll i = a ; i < b ; i++)
#define fjp(a,b) for(ll j = a ; j < b ; j++)
#define fp(x,a,b) for(ll x = a ; x < b ; x++)
#define fin(a,b) for(ll i = a : i >= b; i--)
#define fjn(a,b) for(ll j = a : j >= b; j--)
#define fn(x,a,b) for(ll x  = a ; x >= b ; x--);
#define ordered_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
#define total_one(a) __builtin_popcount(a)
#define front_zero(a) __builtin_clzll(a)
#define back_zero(a) __builtin_ctzll(a)
#define fx(a) for(auto x : a)
#define nli "\n"


void _printn(ll a){ cerr<<a<<" ";}
void _printn(int a){ cerr<<a<<" ";}
template <class T,class V> void _printn(pair<T,V> a){ cerr<<"( "<<a.ff<<" , "<<a.ss<<" )";}
template <class T> void _printn(vector<T> a){ 
	cerr<<"[ ";
	for(auto x : a){
		_printn(x);
		cerr<< " ";
	}
	cerr<<"] ";
	return;
}

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

const ll mx =  1e5+5;

ll n,m,k,q,tp,tp2,res,sum,tptp,cnt,ans;
bool f = false;
ll sr,de;
vector<pi> adj[mx][20];

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

		cin>>k>>n>>m>>tptp;
		vector<pi> ve;
		fip(0,m){
			cin>>sr>>de>>tp;
			adj[sr][0].push_back({de,tp});
		}
		fjp(1,20){
			fip(0,n){
				sr = i;
				if(i/k + (1<<j) > (n-1)/k)
					break;
				ve.clear();
				fx(adj[sr][j-1]){
					for(auto y : adj[x.ff][j-1]){
						ve.push_back({y.ff,x.ss+y.ss});
					}
				}
				sort(ve.begin(),ve.end());
				fip(0,(int)ve.size()){
					if(i == 0 || ve[i].ff != ve[i-1].ff)
						adj[sr][j].push_back({ve[i].ff,ve[i].ss});
				}
			}
		}
		
		ll l,r;
		vector<pi> v,v2;
		while(tptp--){
			cin>>sr>>de;
			if(sr==de){
				cout<<0<<nli;
				continue;
			}
			v.clear();
			l = sr;
			r = de;
			ans = 1e18;
			v2.clear();
			v.push_back({l,0});
			while(1){
				if(l/k - r/k >= 0)
					break;
				res = (r/k) - (l/k);
				res = 63 - front_zero(res);
				v2.clear();
				fx(v){
					for( auto y : adj[x.ff][res]){
						v2.push_back({y.ff,x.ss+y.ss});
					}
				}
			
				if((int)v2.size()==0)
					break;
				v.clear();
				sort(v2.begin(),v2.end());
				fip(0,(int)v2.size()){
					if(i==0 || v2[i].ff != v2[i-1].ff)
						v.push_back(v2[i]);
				}				
				
				l = v[0].ff;
			}
			fx(v)
				if(x.ff == de)
					ans = min(ans,x.ss);
			if(ans>1e17)
				ans = -1;
			cout<<ans<<nli;
		}
		
	cerr << "time elapsed : " <<setprecision(6)<< clock()  * 1000.00 / CLOCKS_PER_SEC << " ms"<<nli;
	return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 44 / 44