oj.uz

Submission #278553

# Submission time Handle Problem Language Result Execution time Memory
278553 2020-08-21T14:22:56 Z AM1648 Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 997 ms 4984 KB 
/* be name khoda */

#define long_enable
#include <iostream>
#include <algorithm>
#include <cstring>
#include <numeric>
#include <vector>
#include <fstream>
#include <set>
#include <map>
using namespace std;

#ifdef long_enable
typedef long long int ll;
#else
typedef int ll;
#endif

typedef pair<ll, ll> pii;
typedef pair<pii, ll> ppi;
typedef pair<ll, pii> pip;
typedef vector<ll> vi;
typedef vector<pii> vpii;

#define forifrom(i, s, n) for (ll i = s; i < n; ++i)
#define forirto(i, n, e) for (ll i = (n) - 1; i >= e; --i)
#define fori(i, n) forifrom (i, 0, n)
#define forir(i, n) forirto (i, n, 0)

#define F first
#define S second
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define smin(a, b) a = min(a, (b))
#define smax(a, b) a = max(a, (b))

#define debug(x) cout << #x << " -> " << (x) << endl
#define debug2(x, y) cout << #x << ' ' << #y << " -> " << (x) << ' ' << (y) << endl
#define debug3(x, y, z) cout << #x << ' ' << #y << ' ' << #z << " -> " << (x) << ' ' << (y) << ' ' << (z) << endl
#define debug4(x, y, z, t) cout << #x << ' ' << #y << ' ' << #z << ' ' << #t << " -> " << (x) << ' ' << (y) << ' ' << (z) << ' ' << (t) << endl
#define debuga(x, n) cout << #x << " -> "; fori (i1_da, n) { cout << (x)[i1_da] << ' '; } cout << endl
#define debugaa(x, n, m) cout << #x << " ->\n"; fori (i1_daa, n) { fori (i2_daa, m) { cout << (x)[i1_daa][i2_daa] << ' '; } cout << '\n'; } cout << endl

const ll MOD = 1000000007;
const ll INF = 2000000000;
const long long BIG = 1446803456761533460LL;

#define XL (x << 1)
#define XR (XL | 1)
#define MD ((l + r) >> 1)
#define Add(a, b) a = ((a) + (b)) % MOD
#define Mul(a, b) a = (1LL * (a) * (b)) % MOD

// -----------------------------------------------------------------------

const ll maxn = 210;
const ll maxm = 50010;

ll n, m, d[6][maxn], par[maxn];
vpii g[maxn];
bool vis[maxn], crit[maxm];

struct Edge {
    ll a, b, c, d;
} es[maxm];

void dij(ll s, ll *dd, bool reverse, bool marktree) {
    fori (i, m) {
        if (reverse) g[es[i].b].eb(es[i].a, i);
        else g[es[i].a].eb(es[i].b, i);
    }
    memset(dd, 20, sizeof d[0]);
    memset(vis, 0, sizeof vis);
    dd[s] = 0;
    par[s] = s;
    fori (i, n) {
        ll x = -1;
        fori (j, n) if (!vis[j] && (x == -1 || dd[j] < dd[x])) x = j;
        if (x != s && marktree) crit[par[x]] = true;
        vis[x] = true;
        for (auto [y, e] : g[x]) {
            if (dd[x] + es[e].c < dd[y]) dd[y] = dd[x] + es[e].c, par[y] = e;
        }
    }
    fori (i, n) g[i].clear();
}

int main() {
    ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);

    cin >> n >> m;
    fori (i, m) {
        cin >> es[i].a >> es[i].b >> es[i].c >> es[i].d;
        --es[i].a, --es[i].b;
    }
    dij(0, d[0], false, true);
    dij(0, d[1], true, true);
    dij(n - 1, d[2], false, true);
    dij(n - 1, d[3], true, true);
    ll ans = d[0][n - 1] + d[2][0];
    fori (i, m) {
        if (!crit[i]) {
            ll a = d[0][es[i].b] + d[3][es[i].a];
            ll b = d[2][es[i].b] + d[1][es[i].a];
            smin(ans, a + b + es[i].c * 2 + es[i].d);
            smin(ans, a + d[2][0] + es[i].c + es[i].d);
            smin(ans, d[0][n - 1] + b + es[i].c + es[i].d);
        } else {
            swap(es[i].a, es[i].b);
            dij(0, d[4], false, false);
            dij(n - 1, d[5], false, false);
            swap(es[i].a, es[i].b);
            smin(ans, d[4][n - 1] + d[5][0] + es[i].d);
        }
    }
    if (ans >= BIG) ans = -1;
    cout << ans << '\n';

}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 504 KB Output is correct
2 Correct 16 ms 384 KB Output is correct
3 Correct 100 ms 512 KB Output is correct
4 Correct 103 ms 512 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 25 ms 440 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 51 ms 504 KB Output is correct
11 Correct 66 ms 504 KB Output is correct
12 Correct 61 ms 504 KB Output is correct
13 Correct 56 ms 512 KB Output is correct
14 Correct 88 ms 512 KB Output is correct
15 Correct 84 ms 512 KB Output is correct
16 Correct 84 ms 512 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 684 ms 4152 KB Output is correct
2 Correct 714 ms 4028 KB Output is correct
3 Correct 681 ms 4856 KB Output is correct
4 Correct 106 ms 512 KB Output is correct
5 Correct 81 ms 504 KB Output is correct
6 Correct 36 ms 504 KB Output is correct
7 Correct 7 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 448 ms 4856 KB Output is correct
10 Correct 435 ms 4984 KB Output is correct
11 Correct 630 ms 4652 KB Output is correct
12 Correct 602 ms 4740 KB Output is correct
13 Correct 600 ms 4780 KB Output is correct
14 Correct 618 ms 4608 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 94 ms 512 KB Output is correct
2 Correct 30 ms 384 KB Output is correct
3 Correct 836 ms 3056 KB Output is correct
4 Correct 26 ms 384 KB Output is correct
5 Correct 997 ms 3968 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 638 ms 4248 KB Output is correct
9 Correct 619 ms 4404 KB Output is correct
10 Correct 807 ms 4192 KB Output is correct
11 Correct 801 ms 4216 KB Output is correct
12 Correct 806 ms 4220 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 808 ms 4212 KB Output is correct
20 Correct 838 ms 4216 KB Output is correct
21 Correct 874 ms 4336 KB Output is correct
22 Correct 809 ms 4344 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 504 KB Output is correct
2 Correct 16 ms 384 KB Output is correct
3 Correct 100 ms 512 KB Output is correct
4 Correct 103 ms 512 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 25 ms 440 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 51 ms 504 KB Output is correct
11 Correct 66 ms 504 KB Output is correct
12 Correct 61 ms 504 KB Output is correct
13 Correct 56 ms 512 KB Output is correct
14 Correct 88 ms 512 KB Output is correct
15 Correct 84 ms 512 KB Output is correct
16 Correct 84 ms 512 KB Output is correct
17 Correct 684 ms 4152 KB Output is correct
18 Correct 714 ms 4028 KB Output is correct
19 Correct 681 ms 4856 KB Output is correct
20 Correct 106 ms 512 KB Output is correct
21 Correct 81 ms 504 KB Output is correct
22 Correct 36 ms 504 KB Output is correct
23 Correct 7 ms 384 KB Output is correct
24 Correct 0 ms 384 KB Output is correct
25 Correct 448 ms 4856 KB Output is correct
26 Correct 435 ms 4984 KB Output is correct
27 Correct 630 ms 4652 KB Output is correct
28 Correct 602 ms 4740 KB Output is correct
29 Correct 600 ms 4780 KB Output is correct
30 Correct 618 ms 4608 KB Output is correct
31 Correct 94 ms 512 KB Output is correct
32 Correct 30 ms 384 KB Output is correct
33 Correct 836 ms 3056 KB Output is correct
34 Correct 26 ms 384 KB Output is correct
35 Correct 997 ms 3968 KB Output is correct
36 Correct 1 ms 384 KB Output is correct
37 Correct 0 ms 384 KB Output is correct
38 Correct 638 ms 4248 KB Output is correct
39 Correct 619 ms 4404 KB Output is correct
40 Correct 807 ms 4192 KB Output is correct
41 Correct 801 ms 4216 KB Output is correct
42 Correct 806 ms 4220 KB Output is correct
43 Correct 1 ms 512 KB Output is correct
44 Correct 0 ms 384 KB Output is correct
45 Correct 0 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 808 ms 4212 KB Output is correct
50 Correct 838 ms 4216 KB Output is correct
51 Correct 874 ms 4336 KB Output is correct
52 Correct 809 ms 4344 KB Output is correct
53 Correct 667 ms 4460 KB Output is correct
54 Correct 693 ms 4344 KB Output is correct
55 Correct 682 ms 4424 KB Output is correct
56 Correct 103 ms 512 KB Output is correct
57 Correct 109 ms 512 KB Output is correct
58 Correct 251 ms 3320 KB Output is correct
59 Correct 290 ms 3328 KB Output is correct
60 Correct 404 ms 3448 KB Output is correct
61 Correct 253 ms 3448 KB Output is correct
62 Correct 303 ms 3328 KB Output is correct
63 Correct 394 ms 3328 KB Output is correct
64 Correct 307 ms 3968 KB Output is correct
65 Correct 342 ms 3968 KB Output is correct
66 Correct 464 ms 4088 KB Output is correct
67 Correct 20 ms 4600 KB Output is correct
68 Correct 439 ms 4900 KB Output is correct
69 Correct 442 ms 4956 KB Output is correct
70 Correct 622 ms 4608 KB Output is correct
71 Correct 629 ms 4600 KB Output is correct
72 Correct 594 ms 4608 KB Output is correct
73 Correct 587 ms 4600 KB Output is correct
74 Correct 605 ms 4736 KB Output is correct