Submission #715112

#	Time	Username	Problem	Language	Result	Execution time	Memory
715112		TheConverseEngineer	Alias (COCI21_alias)	C++17	70 / 70	30 ms	468 KiB

alias

#include <bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define sqr(x) ((ll)(x))*(x)
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

vector<pair<int, ll>> adj[1005];
ll dist[1005];
int N, M;

ll INF = LLONG_MAX;

void dijkstra(int start_node) {
	for (int i = 0; i < N; i++) dist[i] = INF;
	dist[start_node] = 0;
	priority_queue<pair<ll, int>, vector<pair<ll, int>>, greater<pair<ll, int>>> pq{};
	pq.push({0ll,start_node});
	while (!pq.empty()) {
		ll d; int node; tie(d, node) = pq.top(); 
		pq.pop();
		if (d != dist[node]) continue;
		for (auto u : adj[node]) {
			if (d+u.second < dist[u.first]) {
				dist[u.first] = d+u.second;
				pq.push({dist[u.first],u.first});
			}
		}
	}
}

map<string, int> stringToNode;
int node = 0;
int main() {
	cin >> N >> M; 
	FOR(i, 0, M) {
		string a, b; cin >> a >> b;
		if (stringToNode.count(a) == 0) stringToNode[a] = node++;
		if (stringToNode.count(b) == 0) stringToNode[b] = node++;
		int _a = stringToNode[a];
		int _b = stringToNode[b];
		ll _d; cin >> _d;
		adj[_a].push_back({_b, _d});
	}

	int T; cin >> T;
	FOR(i, 0, T) {
		string a, b; cin >> a >> b;
		int _a = stringToNode[a];
		int _b = stringToNode[b];
		dijkstra(_a);
		if (dist[_b] == INF) cout << "Roger\n";
		else cout << dist[_b] << "\n";
	}
} 

• Subtask 1: 70 / 70