oj.uz

답안 #34920

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
34920 2017-11-17T04:54:35 Z leejseo 주유소 (KOI16_gas) C++
42 / 100
 129 ms 65536 KB 
#include <stdio.h>
#include <algorithm>
#include <vector>
#include <queue>

using namespace std;

#define maxint 9E18
#define all(v) v.begin(), v.end()
#define MAXV 2500
#define MAXE 4000

int V, E;
int oil[MAXV];

struct Edge{
    int to;
    long long weight;
    Edge (int t_, long long w_) {to = t_; weight = w_;}
};

struct Node{
    int u;
    long long dist;
    Node (int u_, long long d_) {u = u_; dist = d_;}
    bool operator < (const Node &a) const {return dist > a.dist;}
};

vector<Edge> adj[MAXV];

vector<long long> dijkstra(int start, vector<Edge> *adj_list){
    priority_queue<Node> Q;
    vector <long long> dist(V, maxint);
    dist[start] = 0;
    Q.push(Node(start, 0));
    while (!Q.empty()){
        int u = Q.top().u;
        long long dist_u = Q.top().dist;
        Q.pop();
        if (dist[u] < dist_u) {
            continue;
        }
        for (int i=0; i<adj_list[u].size(); i++){
            int v = adj_list[u][i].to;
            long long dist_v = dist_u + adj_list[u][i].weight;
            if (dist_v < dist[v]){
                dist[v] = dist_v;
                Q.push(Node(v, dist_v));
            }
        }
    }
    return dist;
}

long long solve(){
    vector<Edge> cost_graph[V];
    for (int i=0; i<V; i++){
        vector<long long> dist = dijkstra(i, adj);
        for (int j=0; j<V; j++){
            if (j == i || dist[j] == maxint){
                continue;
            }
            long long cost = dist[j] * oil[i];
            cost_graph[i].push_back(Edge(j, cost));
        }
    }
    return dijkstra(0, cost_graph)[V-1];
}

int main(){
    scanf("%d %d", &V, &E);
    for (int i=0; i<V; i++){
        scanf("%d", &oil[i]);
    }
    for (int i=0; i<E; i++){
        int fr, to, weight;

        scanf("%d %d %d", &fr, &to, &weight);
        fr--; to--;
        adj[fr].push_back(Edge(to, weight));
        adj[to].push_back(Edge(fr, weight));
    }
    long long r = solve();
    printf("%lld\n", r);
    return 0;
}

Compilation message

gas.cpp: In function 'std::vector<long long int> dijkstra(int, std::vector<Edge>*)':
gas.cpp:43:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i=0; i<adj_list[u].size(); i++){
                        ^
gas.cpp: In function 'int main()':
gas.cpp:71:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &V, &E);
                           ^
gas.cpp:73:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &oil[i]);
                             ^
gas.cpp:78:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d", &fr, &to, &weight);
                                             ^

Subtask #1
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2000 KB Output is correct
2 Correct 0 ms 2000 KB Output is correct
3 Correct 0 ms 2000 KB Output is correct
4 Correct 0 ms 2000 KB Output is correct
5 Correct 0 ms 2000 KB Output is correct
6 Correct 0 ms 2000 KB Output is correct
7 Correct 0 ms 2000 KB Output is correct
8 Correct 0 ms 2000 KB Output is correct
9 Correct 0 ms 2000 KB Output is correct
10 Correct 0 ms 2000 KB Output is correct
11 Correct 0 ms 2000 KB Output is correct
12 Correct 0 ms 2000 KB Output is correct
13 Correct 0 ms 2000 KB Output is correct

Subtask #2
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Memory limit exceeded 129 ms 65536 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Memory limit exceeded 103 ms 65536 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2000 KB Output is correct
2 Correct 0 ms 2000 KB Output is correct
3 Correct 0 ms 2000 KB Output is correct
4 Correct 0 ms 2000 KB Output is correct
5 Correct 0 ms 2000 KB Output is correct
6 Correct 0 ms 2000 KB Output is correct
7 Correct 0 ms 2000 KB Output is correct
8 Correct 0 ms 2000 KB Output is correct
9 Correct 0 ms 2000 KB Output is correct
10 Correct 0 ms 2000 KB Output is correct
11 Correct 0 ms 2000 KB Output is correct
12 Correct 0 ms 2000 KB Output is correct
13 Correct 0 ms 2000 KB Output is correct
14 Correct 26 ms 6244 KB Output is correct
15 Correct 16 ms 6072 KB Output is correct
16 Correct 16 ms 6080 KB Output is correct
17 Correct 73 ms 6324 KB Output is correct
18 Correct 66 ms 6332 KB Output is correct
19 Correct 33 ms 6124 KB Output is correct
20 Correct 26 ms 6124 KB Output is correct
21 Correct 26 ms 5940 KB Output is correct
22 Correct 29 ms 6124 KB Output is correct

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2000 KB Output is correct
2 Correct 0 ms 2000 KB Output is correct
3 Correct 0 ms 2000 KB Output is correct
4 Correct 0 ms 2000 KB Output is correct
5 Correct 0 ms 2000 KB Output is correct
6 Correct 0 ms 2000 KB Output is correct
7 Correct 0 ms 2000 KB Output is correct
8 Correct 0 ms 2000 KB Output is correct
9 Correct 0 ms 2000 KB Output is correct
10 Correct 0 ms 2000 KB Output is correct
11 Correct 0 ms 2000 KB Output is correct
12 Correct 0 ms 2000 KB Output is correct
13 Correct 0 ms 2000 KB Output is correct
14 Memory limit exceeded 129 ms 65536 KB Memory limit exceeded
15 Halted 0 ms 0 KB -