# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
651495 |
2022-10-19T05:49:35 Z |
alvinpiter |
Toll (BOI17_toll) |
C++17 |
|
137 ms |
30028 KB |
/*
Picture the nodes are arranged in a 2D matrix with K rows
where each column contains nodes with the same floor(index/K).
dp[node][jump][k] = minimum cost to go from node "node" to the k-th node located in column node/K + 2^jump.
*/
#include<bits/stdc++.h>
using namespace std;
#define INF 1000000000
#define MAXN 50000
#define MAXLG 15
#define MAXK 5
int K, N, M, Q, dp[MAXN + 3][MAXLG + 3][MAXK + 3];
int main() {
cin >> K >> N >> M >> Q;
for (int i = 0; i < N; i++) {
for (int jump = 0; jump <= MAXLG; jump++) {
for (int k = 0; k <= K; k++) {
dp[i][jump][k] = INF;
}
}
}
for (int i = 0; i < M; i++) {
int a, b, t;
cin >> a >> b >> t;
dp[a][0][b%K] = t;
}
int numberOfColumns = N/K + (N%K == 0 ? 0 : 1);
for (int jump = 1; jump <= MAXLG; jump++) {
for (int i = 0; i < N; i++) {
int currentColumn = i/K;
int destinationColumn = currentColumn + (1 << jump);
if (destinationColumn >= numberOfColumns) {
continue;
}
for (int destinationK = 0; destinationK < K; destinationK++) {
for (int transitK = 0; transitK < K; transitK++) {
int transitColumn = currentColumn + (1 << (jump - 1));
int transitNode = transitColumn * K + transitK;
dp[i][jump][destinationK] = min(dp[i][jump][destinationK], dp[i][jump - 1][transitK] + dp[transitNode][jump - 1][destinationK]);
}
}
}
}
for (int q = 0; q < Q; q++) {
int a, b;
cin >> a >> b;
int currentColumn = a/K, destinationColumn = b/K;
int columnDiff = destinationColumn - currentColumn;
map<int, int> currentNodes;
currentNodes[a] = 0; // The value is dummy
for (int jump = 0; jump <= MAXLG; jump++) {
if (columnDiff & (1 << jump)) {
map<int, int> newNodes;
for (auto [currentNode, temp]: currentNodes) {
for (int destinationK = 0; destinationK < K; destinationK++) {
int destinationColumn = currentColumn + (1 << jump);
int destinationNode = destinationColumn * K + destinationK;
if (newNodes.find(destinationNode) == newNodes.end()) {
newNodes[destinationNode] = dp[currentNode][jump][destinationK];
} else {
newNodes[destinationNode] = min(newNodes[destinationNode], dp[currentNode][jump][destinationK]);
}
}
}
swap(currentNodes, newNodes);
currentColumn += (1 << jump);
}
}
cout << (currentNodes[b] < INF ? currentNodes[b] : -1) << endl;
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
92 ms |
29364 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
137 ms |
30028 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
92 ms |
29364 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |