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Submission #384607

# Submission time Handle Problem Language Result Execution time Memory
384607 2021-04-01T22:03:10 Z JerryLiu06 Toll (BOI17_toll) C++11
100 / 100
 192 ms 9708 KB 
#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> pii;
typedef pair<pii, int> ppi;

#define pb push_back

#define f first
#define s second

int K, N, M, O; vector<pii> adj[50010]; vector<pii> Q;

int DP[50010][5][5]; int ans[100010]; const int INF = 1061109567;

void divide(int L, int R, vector<int> V) {
    if (R < L) return ; int mid = (L + R) / 2;
    
    for (int i = L; i <= R; i++) memset(DP[i], 0x3f, sizeof DP[i]);

    for (int i = 0; i < K; i++) for (int j = 0; j < K; j++) DP[mid][i][j] = (i == j) ? 0 : INF;

    for (int i = mid - 1; i >= L; i--) for (int a = 0; a < K; a++) for (int b = 0; b < K; b++) {
        for (pii NXT : adj[i * K + a]) DP[i][a][b] = min(DP[i][a][b], DP[i + 1][NXT.f % K][b] + NXT.s);
    }
    for (int i = mid + 1; i <= R; i++) for (int a = 0; a < K; a++) for (int b = 0; b < K; b++) {
        for (pii NXT : adj[(i - 1) * K + b]) DP[i][a][NXT.f % K] = min(DP[i][a][NXT.f % K], DP[i - 1][a][b] + NXT.s);
    }
    vector<int> todo[2]; for (int T : V) { pii P = Q[T];

        if (P.f / K <= mid && mid <= P.s / K) for (int i = 0; i < K; i++) {
            ans[T] = min(ans[T], DP[P.f / K][P.f % K][i] + DP[P.s / K][i][P.s % K]);
        }
        else todo[P.f / K > mid].pb(T);
    }
    divide(L, mid - 1, todo[0]); divide(mid + 1, R, todo[1]);
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    
    cin >> K >> N >> M >> O; memset(ans, 0x3f, sizeof ans);

    for (int i = 0; i < M; i++) { int A, B, T; cin >> A >> B >> T; adj[A].pb({B, T}); }

    vector<int> todo; for (int i = 0; i < O; i++) { int A, B; cin >> A >> B; Q.pb({A, B}); todo.pb(i); }

    divide(0, N / K, todo); for (int i = 0; i < O; i++) cout << ((ans[i] == INF) ? -1 : ans[i]) << "\n";
}

Compilation message

toll.cpp: In function 'void divide(int, int, std::vector<int>)':
toll.cpp:18:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   18 |     if (R < L) return ; int mid = (L + R) / 2;
      |     ^~
toll.cpp:18:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   18 |     if (R < L) return ; int mid = (L + R) / 2;
      |                         ^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 9708 KB Output is correct
2 Correct 2 ms 1900 KB Output is correct
3 Correct 2 ms 2028 KB Output is correct
4 Correct 2 ms 1900 KB Output is correct
5 Correct 3 ms 2028 KB Output is correct
6 Correct 3 ms 2028 KB Output is correct
7 Correct 3 ms 2176 KB Output is correct
8 Correct 50 ms 9584 KB Output is correct
9 Correct 49 ms 9452 KB Output is correct
10 Correct 16 ms 7148 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 7936 KB Output is correct
2 Correct 2 ms 2048 KB Output is correct
3 Correct 3 ms 1900 KB Output is correct
4 Correct 2 ms 1900 KB Output is correct
5 Correct 2 ms 1900 KB Output is correct
6 Correct 2 ms 1900 KB Output is correct
7 Correct 5 ms 2412 KB Output is correct
8 Correct 6 ms 2412 KB Output is correct
9 Correct 49 ms 9580 KB Output is correct
10 Correct 132 ms 8684 KB Output is correct
11 Correct 78 ms 7988 KB Output is correct
12 Correct 69 ms 6636 KB Output is correct
13 Correct 143 ms 7788 KB Output is correct
14 Correct 71 ms 6124 KB Output is correct
15 Correct 73 ms 5228 KB Output is correct
16 Correct 69 ms 5100 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1900 KB Output is correct
2 Correct 2 ms 1900 KB Output is correct
3 Correct 2 ms 1900 KB Output is correct
4 Correct 3 ms 1900 KB Output is correct
5 Correct 2 ms 1900 KB Output is correct
6 Correct 3 ms 2028 KB Output is correct
7 Correct 3 ms 2028 KB Output is correct
8 Correct 5 ms 2028 KB Output is correct
9 Correct 5 ms 2028 KB Output is correct
10 Correct 50 ms 9196 KB Output is correct
11 Correct 73 ms 7404 KB Output is correct
12 Correct 117 ms 8172 KB Output is correct
13 Correct 135 ms 8840 KB Output is correct
14 Correct 97 ms 7532 KB Output is correct
15 Correct 86 ms 4972 KB Output is correct
16 Correct 69 ms 5088 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1900 KB Output is correct
2 Correct 2 ms 1900 KB Output is correct
3 Correct 2 ms 1900 KB Output is correct
4 Correct 3 ms 1900 KB Output is correct
5 Correct 2 ms 1900 KB Output is correct
6 Correct 3 ms 2028 KB Output is correct
7 Correct 3 ms 2028 KB Output is correct
8 Correct 5 ms 2028 KB Output is correct
9 Correct 5 ms 2028 KB Output is correct
10 Correct 50 ms 9196 KB Output is correct
11 Correct 73 ms 7404 KB Output is correct
12 Correct 117 ms 8172 KB Output is correct
13 Correct 135 ms 8840 KB Output is correct
14 Correct 97 ms 7532 KB Output is correct
15 Correct 86 ms 4972 KB Output is correct
16 Correct 69 ms 5088 KB Output is correct
17 Correct 86 ms 7620 KB Output is correct
18 Correct 3 ms 1900 KB Output is correct
19 Correct 3 ms 1900 KB Output is correct
20 Correct 2 ms 1900 KB Output is correct
21 Correct 2 ms 1900 KB Output is correct
22 Correct 2 ms 1900 KB Output is correct
23 Correct 4 ms 2156 KB Output is correct
24 Correct 5 ms 2156 KB Output is correct
25 Correct 5 ms 2156 KB Output is correct
26 Correct 5 ms 2284 KB Output is correct
27 Correct 53 ms 9324 KB Output is correct
28 Correct 109 ms 8300 KB Output is correct
29 Correct 134 ms 8812 KB Output is correct
30 Correct 106 ms 7660 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 9708 KB Output is correct
2 Correct 2 ms 1900 KB Output is correct
3 Correct 2 ms 2028 KB Output is correct
4 Correct 2 ms 1900 KB Output is correct
5 Correct 3 ms 2028 KB Output is correct
6 Correct 3 ms 2028 KB Output is correct
7 Correct 3 ms 2176 KB Output is correct
8 Correct 50 ms 9584 KB Output is correct
9 Correct 49 ms 9452 KB Output is correct
10 Correct 16 ms 7148 KB Output is correct
11 Correct 80 ms 7936 KB Output is correct
12 Correct 2 ms 2048 KB Output is correct
13 Correct 3 ms 1900 KB Output is correct
14 Correct 2 ms 1900 KB Output is correct
15 Correct 2 ms 1900 KB Output is correct
16 Correct 2 ms 1900 KB Output is correct
17 Correct 5 ms 2412 KB Output is correct
18 Correct 6 ms 2412 KB Output is correct
19 Correct 49 ms 9580 KB Output is correct
20 Correct 132 ms 8684 KB Output is correct
21 Correct 78 ms 7988 KB Output is correct
22 Correct 69 ms 6636 KB Output is correct
23 Correct 143 ms 7788 KB Output is correct
24 Correct 71 ms 6124 KB Output is correct
25 Correct 73 ms 5228 KB Output is correct
26 Correct 69 ms 5100 KB Output is correct
27 Correct 3 ms 1900 KB Output is correct
28 Correct 2 ms 1900 KB Output is correct
29 Correct 2 ms 1900 KB Output is correct
30 Correct 3 ms 1900 KB Output is correct
31 Correct 2 ms 1900 KB Output is correct
32 Correct 3 ms 2028 KB Output is correct
33 Correct 3 ms 2028 KB Output is correct
34 Correct 5 ms 2028 KB Output is correct
35 Correct 5 ms 2028 KB Output is correct
36 Correct 50 ms 9196 KB Output is correct
37 Correct 73 ms 7404 KB Output is correct
38 Correct 117 ms 8172 KB Output is correct
39 Correct 135 ms 8840 KB Output is correct
40 Correct 97 ms 7532 KB Output is correct
41 Correct 86 ms 4972 KB Output is correct
42 Correct 69 ms 5088 KB Output is correct
43 Correct 86 ms 7620 KB Output is correct
44 Correct 3 ms 1900 KB Output is correct
45 Correct 3 ms 1900 KB Output is correct
46 Correct 2 ms 1900 KB Output is correct
47 Correct 2 ms 1900 KB Output is correct
48 Correct 2 ms 1900 KB Output is correct
49 Correct 4 ms 2156 KB Output is correct
50 Correct 5 ms 2156 KB Output is correct
51 Correct 5 ms 2156 KB Output is correct
52 Correct 5 ms 2284 KB Output is correct
53 Correct 53 ms 9324 KB Output is correct
54 Correct 109 ms 8300 KB Output is correct
55 Correct 134 ms 8812 KB Output is correct
56 Correct 106 ms 7660 KB Output is correct
57 Correct 192 ms 9556 KB Output is correct
58 Correct 49 ms 9580 KB Output is correct
59 Correct 98 ms 8044 KB Output is correct