Submission #464035

#	Time	Username	Problem	Language	Result	Execution time	Memory
464035		deinfreund	Toll (BOI17_toll)	C++17	Compilation error	0 ms	0 KiB

toll

#include <bits/stdc++.h>
#include "prettyprint.h"
#define int int64_t

using namespace std;

vector<map<int, int, greater<int>>> graph; // map<target, distance>
int K;
const int INF = 1e10;
//vector<pair<int, int>> distance; // pair<start, distance>

int findShortestDistance(int s, int e) {
    priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;
    unordered_map<int, int> distance;
    pq.emplace(0, s);
    while (!pq.empty()){
        auto [cost, pos] = pq.top();
        pq.pop();
        if (distance.find(pos) != distance.end()) continue;
        distance[pos] = cost;
        int k = 0;
        for (const auto& [p, c] : graph[pos]) {
            if (p <= e) { // can't go backwards due to graph structure
                pq.emplace(cost + c, p);
                if (++k >= K) break;
            }
        }
    }
    return distance.find(e) == distance.end() ? INF : distance.at(e);
}

void addSkipEdges(int skipDistance) {
    for (int startCluster = 0; startCluster < graph.size() / K; startCluster+=skipDistance) {
        for (int startNode = startCluster * K; startNode < (startCluster + 1) * K; startNode++) {
            for (int endNode = (startCluster + 1) * K; endNode < (startCluster + 2) * K; endNode++) {
                if (endNode > graph.size()) break;
                graph[startNode][endNode] = findShortestDistance(startNode, endNode);
            }
        }
    }
}

main() {
    int N,M,O;
    cin >> K >> N >> M >> O;
    graph.resize(N);
    for (int i = 0; i < M; i++) {
        int s, e, c;
        cin >> s >> e >> c;
        graph[s][e] = c;
    }
    for (int skipDist = 2; skipDist < N / K; skipDist *= 2) {
        addSkipEdges(skipDist);
    }
    for (int o = 0; o < O; o++) {
        int s, e;
        cin >> s >> e;
        int dist = findShortestDistance(s, e);
        cout << (dist < INF ? dist : -1) << "\n";
    }
}

Compilation message (stderr)

toll.cpp:2:10: fatal error: prettyprint.h: No such file or directory
    2 | #include "prettyprint.h"
      |          ^~~~~~~~~~~~~~~
compilation terminated.