Submission #760424

#	Time	Username	Problem	Language	Result	Execution time	Memory
760424		shadow_sami	Toll (BOI17_toll)	C++17	7 / 100	3031 ms	7372 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"

#if ONLINE_JUDGE
#define	debug(x) cerr<< #x <<" "<< printn(n) << nli;
#else
#define debug(x)
#endif

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<<" ) "<<nli;}
template <class T> void _printn(vector<T> a){ 
	cerr<<"[ ";
	for(auto x : a){
		_printn(a);
		cerr<<nli;
	}
	cerr<<"]"<<nli;
	return;
}

const ll mx =  1e5+5;

ll n,m,k,q,tp,tp2,res,sum,tptp,cnt,ans;
bool f = false;
ll timer = 0;
vector<pi> adj[mx];
ll conn[mx];
ll dis[mx];

void dfs(ll u){
	fx(adj[u]){
		dis[x.ff] = dis[u] + x.ss;
		conn[x.ff] = conn[u];
		dfs(x.ff);
	}
	return;
}
int sr,de;

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;
		fip(0,m){
			cin>>sr>>de>>tp;
			adj[sr].push_back({de,tp});
		}
		fip(0,n+2)
			dis[i] = 1e18,conn[i] = -1;
		fip(0,n+1){
			if(conn[i]==-1){
				if((int)adj[i].size() == 0)
					continue;
				dis[i] = 0;
				conn[i] = timer;
				timer++;
				dfs(i);
			}
		}		
		// fip(0,n)
		// 	cout<<conn[i]<<" ";
		// cout<<nli;
		while(tptp--){
			cin>>sr>>de;
			if(dis[de] > 1e9 || dis[sr] > 1e9 || sr > de || conn[sr] != conn[de]){
				cout<<-1<<nli;
				continue;
			}
			cout<<dis[de]-dis[sr]<<nli;
		}
		
	cerr << "time elapsed : " <<setprecision(6)<< clock()  * 1000.00 / CLOCKS_PER_SEC << " ms"<<nli;
	return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44