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답안 #251974

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
251974 2020-07-23T10:10:14 Z IgorI Jakarta Skyscrapers (APIO15_skyscraper) C++17
100 / 100
 358 ms 105080 KB 
const int LG = 21;
const int N = 400005;
const long long MOD = 1e9 + 7;
const long long INF = 1e9;
const long long INFLL = 1e18;

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
typedef vector<ll> vll;

#define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define popcount(x) __builtin_popcount(x)
#define popcountll(x) __builtin_popcountll(x)
#define fi first
#define se second
#define re return
#define pb push_back
#define uniq(x) sort(all(x)); (x).resize(unique(all(x)) - (x).begin())

#ifdef LOCAL
#define dbg(x) cerr << __LINE__ << " " << #x << " " << x << endl
#define ln cerr << __LINE__ << endl
#else
#define dbg(x) void(0)
#define ln void(0)
#endif // LOCAL

const int K = 800;

signed main()
{
    int n, m;
    cin >> n >> m;
    vector<map<int, int> > dist_big(n);
    vector<vector<int> > dist_small(n, vector<int>(K, INF));
    vector<int> b(m), p(m);
    vector<vi> kek(n);
    for (int i = 0; i < m; i++) cin >> b[i] >> p[i], kek[b[i]].push_back(p[i]);
    for (int i = 0; i < n; i++)
    {
        uniq(kek[i]);
    }
    deque<pii> q;
    int s = b[0], f = b[1];
    for (auto i : kek[s])
    {
        if (i < K) dist_small[s][i] = 0;
        else dist_big[s][i] = 0;
        q.push_back({s, i});
    }
    vector<int> init(n, INF);
    init[s] = 0;
    if (f == s) cout << 0, exit(0);
    while (q.size())
    {
        pair<int, int> x = q.front();
        q.pop_front();
        int di = 0;
        if (x.se < K) di = dist_small[x.fi][x.se];
        else di = dist_big[x.fi][x.se];
        if (init[x.first] == INF)
        {
            for (auto j : kek[x.fi])
            {
                if (j < K)
                {
                    if (dist_small[x.fi][j] == INF)
                    {
                        dist_small[x.fi][j] = di;
                        q.push_front({x.fi, j});
                    }
                }
                else
                {
                    if (dist_big[x.fi].find(j) == dist_big[x.fi].end())
                    {
                        dist_big[x.fi][j] = di;
                        q.push_front({x.fi, j});
                    }
                }
            }
            init[x.fi] = di;
            if (x.fi == f) cout << init[x.fi], exit(0);
        }
        if (x.se < K)
        {
            if (x.fi - x.se >= 0 && dist_small[x.fi - x.se][x.se] == INF)
            {
                dist_small[x.fi - x.se][x.se] = di + 1;
                q.push_back({x.fi - x.se, x.se});
            }
            if (x.fi + x.se < n && dist_small[x.fi + x.se][x.se] == INF)
            {
                dist_small[x.fi + x.se][x.se] = di + 1;
                q.push_back({x.fi + x.se, x.se});
            }
        }
        else
        {
            if (x.fi - x.se >= 0 && dist_big[x.fi - x.se].find(x.se) == dist_big[x.fi - x.se].end())
            {
                dist_big[x.fi - x.se][x.se] = di + 1;
                q.push_back({x.fi - x.se, x.se});
            }
            if (x.fi + x.se < n && dist_big[x.fi + x.se].find(x.se) == dist_big[x.fi + x.se].end())
            {
                dist_big[x.fi + x.se][x.se] = di + 1;
                q.push_back({x.fi + x.se, x.se});
            }
        }
    }
    cout << -1;
}

/* Note:
Check constants at the beginning of the code.
    N is set to 4e5 but be careful in problems with large constant factor.
    Setting N in every problem is more effective.
Check corner cases.
    N = 1
No def int long long for now.
Add something here.
*/

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 512 KB Output is correct
10 Correct 1 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 1024 KB Output is correct
17 Correct 3 ms 2816 KB Output is correct
18 Correct 4 ms 6016 KB Output is correct
19 Correct 4 ms 6784 KB Output is correct
20 Correct 5 ms 6912 KB Output is correct
21 Correct 2 ms 1664 KB Output is correct
22 Correct 5 ms 6144 KB Output is correct
23 Correct 4 ms 5504 KB Output is correct
24 Correct 6 ms 6656 KB Output is correct
25 Correct 6 ms 6912 KB Output is correct
26 Correct 6 ms 6784 KB Output is correct
27 Correct 5 ms 6784 KB Output is correct
28 Correct 7 ms 6912 KB Output is correct
29 Correct 5 ms 6784 KB Output is correct
30 Correct 4 ms 6784 KB Output is correct
31 Correct 5 ms 6784 KB Output is correct
32 Correct 4 ms 6784 KB Output is correct
33 Correct 10 ms 6784 KB Output is correct
34 Correct 6 ms 6784 KB Output is correct

Subtask #4
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 1024 KB Output is correct
17 Correct 3 ms 2816 KB Output is correct
18 Correct 4 ms 6016 KB Output is correct
19 Correct 4 ms 6784 KB Output is correct
20 Correct 5 ms 6912 KB Output is correct
21 Correct 2 ms 1664 KB Output is correct
22 Correct 4 ms 6144 KB Output is correct
23 Correct 4 ms 5504 KB Output is correct
24 Correct 5 ms 6656 KB Output is correct
25 Correct 5 ms 6912 KB Output is correct
26 Correct 5 ms 6784 KB Output is correct
27 Correct 5 ms 6784 KB Output is correct
28 Correct 8 ms 6912 KB Output is correct
29 Correct 5 ms 6784 KB Output is correct
30 Correct 4 ms 6784 KB Output is correct
31 Correct 5 ms 6784 KB Output is correct
32 Correct 6 ms 6784 KB Output is correct
33 Correct 8 ms 6784 KB Output is correct
34 Correct 6 ms 6912 KB Output is correct
35 Correct 27 ms 6264 KB Output is correct
36 Correct 6 ms 3968 KB Output is correct
37 Correct 26 ms 7168 KB Output is correct
38 Correct 32 ms 7928 KB Output is correct
39 Correct 28 ms 7288 KB Output is correct
40 Correct 26 ms 7424 KB Output is correct
41 Correct 27 ms 7424 KB Output is correct
42 Correct 23 ms 7296 KB Output is correct
43 Correct 22 ms 7296 KB Output is correct
44 Correct 22 ms 7296 KB Output is correct
45 Correct 34 ms 7416 KB Output is correct
46 Correct 31 ms 7416 KB Output is correct

Subtask #5
43.0 / 43.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 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 1 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 1024 KB Output is correct
17 Correct 3 ms 2816 KB Output is correct
18 Correct 4 ms 6016 KB Output is correct
19 Correct 4 ms 6784 KB Output is correct
20 Correct 5 ms 6912 KB Output is correct
21 Correct 2 ms 1664 KB Output is correct
22 Correct 4 ms 6144 KB Output is correct
23 Correct 4 ms 5504 KB Output is correct
24 Correct 5 ms 6656 KB Output is correct
25 Correct 5 ms 6912 KB Output is correct
26 Correct 5 ms 6784 KB Output is correct
27 Correct 5 ms 6784 KB Output is correct
28 Correct 8 ms 6912 KB Output is correct
29 Correct 5 ms 6784 KB Output is correct
30 Correct 4 ms 6784 KB Output is correct
31 Correct 5 ms 6784 KB Output is correct
32 Correct 5 ms 6784 KB Output is correct
33 Correct 8 ms 6784 KB Output is correct
34 Correct 6 ms 6784 KB Output is correct
35 Correct 25 ms 6272 KB Output is correct
36 Correct 6 ms 3968 KB Output is correct
37 Correct 19 ms 7296 KB Output is correct
38 Correct 27 ms 7928 KB Output is correct
39 Correct 26 ms 7296 KB Output is correct
40 Correct 26 ms 7288 KB Output is correct
41 Correct 26 ms 7416 KB Output is correct
42 Correct 22 ms 7296 KB Output is correct
43 Correct 22 ms 7296 KB Output is correct
44 Correct 22 ms 7296 KB Output is correct
45 Correct 36 ms 7424 KB Output is correct
46 Correct 29 ms 7416 KB Output is correct
47 Correct 47 ms 41592 KB Output is correct
48 Correct 57 ms 76280 KB Output is correct
49 Correct 59 ms 83320 KB Output is correct
50 Correct 59 ms 91384 KB Output is correct
51 Correct 82 ms 100856 KB Output is correct
52 Correct 89 ms 101240 KB Output is correct
53 Correct 74 ms 98808 KB Output is correct
54 Correct 49 ms 97664 KB Output is correct
55 Correct 51 ms 97656 KB Output is correct
56 Correct 69 ms 98808 KB Output is correct
57 Correct 58 ms 97784 KB Output is correct
58 Correct 63 ms 98040 KB Output is correct
59 Correct 73 ms 98040 KB Output is correct
60 Correct 71 ms 98040 KB Output is correct
61 Correct 76 ms 98296 KB Output is correct
62 Correct 147 ms 105080 KB Output is correct
63 Correct 226 ms 98296 KB Output is correct
64 Correct 231 ms 98484 KB Output is correct
65 Correct 301 ms 98552 KB Output is correct
66 Correct 358 ms 98552 KB Output is correct
67 Correct 204 ms 98580 KB Output is correct