oj.uz

Submission #242453

# Submission time Handle Problem Language Result Execution time Memory
242453 2020-06-27T17:51:10 Z SorahISA Olympic Bus (JOI20_ho_t4) C++17
11 / 100
 36 ms 3960 KB 
// #pragma GCC target("avx2")
#pragma GCC optimize("O3", "unroll-loops")

// #include <bits/extc++.h>
// using namespace __gnu_pbds;

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

#define int long long
#define double long double
// template <typename T>
// using pbds_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
using pii = pair<int, int>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using Prior = priority_queue<T>;

#define X first
#define Y second
#define ALL(x) (x).begin(), (x).end()
#define eb emplace_back
#define pb push_back

#define fastIO() ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define RANDOM() random_device __rd; \
                 mt19937 __gen = mt19937(__rd()); \
                 uniform_int_distribution<int> __dis(1, 1E8); \
                 auto rnd = bind(__dis, __gen)

const int INF = 1E18;
const int mod = 1E9 + 7;
const int maxn = 200 + 5;

struct Edge {
    int u, v, c, d;
    Edge(int _u = 0, int _v = 0, int _c = 0, int _d = 0) :
        u(_u), v(_v), c(_c), d(_d) {}
};

vector<Edge> edge;
int floyd[maxn][maxn];

void init() {
    for (int i = 0; i < maxn; ++i) {
        for (int j = 0; j < maxn; ++j) floyd[i][j] = INF;
        floyd[i][i] = 0;
    }
}

int32_t main() {
    fastIO();
    init();
    
    int n, m;
    cin >> n >> m;
    
    for (int i = 0; i < m; ++i) {
        int u, v, c, d;
        cin >> u >> v >> c >> d;
        edge.eb(u, v, c, d);
        floyd[u][v] = min(floyd[u][v], c);
    }
    
    for (int mid = 1; mid <= n; ++mid) {
        for (int i = 1; i <= n; ++i) {
            for (int j = 1; j <= n; ++j) {
                floyd[i][j] = min(floyd[i][j], floyd[i][mid] + floyd[mid][j]);
            }
        }
    }
    
    /* if (floyd[1][n] != INF and floyd[n][1] == INF) {
        int minC = INF;
        for (auto e : edge) {
            // if (floyd[e.u][1] != INF and floyd[n][e.v] != INF) //
            minC = min(minC, floyd[e.u][1] + floyd[n][e.v] + e.c + e.d);
        }
        cout << (minC == INF ? -1 : minC + floyd[1][n]) << "\n";
        return 0;
    } */
    
    int minC = floyd[1][n] + floyd[n][1];
    for (auto e : edge) {
        int min1N = min(floyd[1][n], floyd[e.u][n] + floyd[1][e.v] + e.c);
        int minN1 = min(floyd[n][1], floyd[e.u][1] + floyd[n][e.v] + e.c);
        // cout << min1N << " " << minN1 << " " << e.d << " " << min1N + minN1 + e.d << "\n";
        minC = min(minC, min1N + minN1 + e.d);
    }
    
    cout << (minC >= INF ? -1 : minC) << "\n";
    
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 768 KB Output is correct
2 Correct 13 ms 640 KB Output is correct
3 Correct 13 ms 768 KB Output is correct
4 Correct 15 ms 768 KB Output is correct
5 Correct 5 ms 768 KB Output is correct
6 Correct 13 ms 768 KB Output is correct
7 Incorrect 5 ms 640 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 2936 KB Output is correct
2 Correct 35 ms 3704 KB Output is correct
3 Correct 36 ms 3832 KB Output is correct
4 Correct 14 ms 896 KB Output is correct
5 Correct 13 ms 768 KB Output is correct
6 Correct 13 ms 788 KB Output is correct
7 Correct 13 ms 768 KB Output is correct
8 Correct 5 ms 640 KB Output is correct
9 Correct 36 ms 3832 KB Output is correct
10 Correct 36 ms 3960 KB Output is correct
11 Correct 35 ms 3952 KB Output is correct
12 Correct 34 ms 3832 KB Output is correct
13 Correct 35 ms 3832 KB Output is correct
14 Correct 36 ms 3832 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 768 KB Output is correct
2 Correct 13 ms 640 KB Output is correct
3 Correct 30 ms 3576 KB Output is correct
4 Correct 13 ms 640 KB Output is correct
5 Correct 34 ms 3576 KB Output is correct
6 Incorrect 5 ms 640 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 768 KB Output is correct
2 Correct 13 ms 640 KB Output is correct
3 Correct 13 ms 768 KB Output is correct
4 Correct 15 ms 768 KB Output is correct
5 Correct 5 ms 768 KB Output is correct
6 Correct 13 ms 768 KB Output is correct
7 Incorrect 5 ms 640 KB Output isn't correct
8 Halted 0 ms 0 KB -