Submission #2861177
Source Code Expand
#include<bits/stdc++.h> const int N = 2e5 + 5; const int inf = 1e9 + 7; using namespace std; struct data { int val, ed; bool ck; }; vector <int> adj[N]; deque <data> mq; int u[N], v[N], c[N], n, m; int d[N][2]; int main(){ ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); cin >> n >> m; for (int i = 1; i <= m; i++) { cin >> u[i] >> v[i] >> c[i]; adj[u[i]].push_back(i); adj[v[i]].push_back(i); } for (int i = 0; i < N; i++) d[i][0] = d[i][1] = inf; for (int i = 0; i < adj[1].size(); i++){ int ed = adj[1][i]; d[ed][1 != u[ed]] = 1; mq.push_front({1, ed, 1 != u[ed]}); } while (mq.size()){ data U = mq.front(); mq.pop_front(); int ed = U.ed, val = U.val, ck = U.ck, x = ((ck) ? u[ed] : v[ed]); if (val != d[ed][ck]) continue; if (x == n) return cout << val << "\n", 0; for (int i = 0; i < adj[x].size(); i++){ int ned = adj[x][i]; if (d[ned][x != u[ned]] <= val + (c[ed] != c[ned])) continue; d[ned][x != u[ned]] = val + (c[ed] != c[ned]); if (c[ed] != c[ned]) mq.push_back({d[ned][x != u[ned]], ned, x != u[ned]}); else mq.push_front({d[ned][x != u[ned]], ned, x != u[ned]}); } } cout << "-1\n"; }
Submission Info
Submission Time | |
---|---|
Task | E - Snuke's Subway Trip |
User | sky2001 |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1385 Byte |
Status | TLE |
Exec Time | 3160 ms |
Memory | 16896 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 600 | ||||
Status | AC |
|
Set Name | Test Cases |
---|---|
Sample | |
All | 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, sample_01.txt, sample_02.txt, sample_03.txt, w1.txt, w10.txt, w11.txt, w12.txt, w13.txt, w14.txt, w15.txt, w16.txt, w17.txt, w18.txt, w2.txt, w3.txt, w4.txt, w5.txt, w6.txt, w7.txt, w8.txt, w9.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01.txt | AC | 4 ms | 8448 KB |
02.txt | AC | 60 ms | 15488 KB |
03.txt | AC | 98 ms | 14592 KB |
04.txt | AC | 76 ms | 13056 KB |
05.txt | AC | 81 ms | 14208 KB |
06.txt | AC | 41 ms | 11904 KB |
07.txt | AC | 47 ms | 12032 KB |
08.txt | AC | 84 ms | 13952 KB |
09.txt | AC | 45 ms | 12032 KB |
10.txt | AC | 50 ms | 12032 KB |
11.txt | TLE | 3156 ms | 15488 KB |
12.txt | TLE | 3156 ms | 13564 KB |
13.txt | TLE | 3156 ms | 15868 KB |
14.txt | AC | 110 ms | 14848 KB |
15.txt | TLE | 3156 ms | 14848 KB |
16.txt | AC | 2238 ms | 14976 KB |
17.txt | TLE | 3156 ms | 14972 KB |
18.txt | AC | 508 ms | 13696 KB |
19.txt | AC | 1113 ms | 14844 KB |
20.txt | AC | 359 ms | 15360 KB |
21.txt | AC | 973 ms | 13568 KB |
22.txt | TLE | 3156 ms | 15356 KB |
23.txt | AC | 108 ms | 15232 KB |
24.txt | AC | 2500 ms | 13824 KB |
25.txt | AC | 2937 ms | 14076 KB |
26.txt | TLE | 3156 ms | 15612 KB |
27.txt | AC | 75 ms | 12672 KB |
28.txt | AC | 1649 ms | 13568 KB |
29.txt | AC | 900 ms | 13696 KB |
30.txt | TLE | 3156 ms | 13564 KB |
31.txt | AC | 864 ms | 14208 KB |
32.txt | TLE | 3156 ms | 13692 KB |
33.txt | AC | 1019 ms | 14976 KB |
34.txt | TLE | 3156 ms | 16896 KB |
35.txt | TLE | 3156 ms | 13180 KB |
36.txt | TLE | 3156 ms | 13692 KB |
37.txt | AC | 988 ms | 14848 KB |
38.txt | TLE | 3156 ms | 14848 KB |
sample_01.txt | AC | 4 ms | 8320 KB |
sample_02.txt | AC | 3 ms | 8320 KB |
sample_03.txt | AC | 3 ms | 8320 KB |
w1.txt | TLE | 3160 ms | 14836 KB |
w10.txt | AC | 78 ms | 11776 KB |
w11.txt | AC | 49 ms | 15616 KB |
w12.txt | AC | 56 ms | 15488 KB |
w13.txt | AC | 358 ms | 11136 KB |
w14.txt | AC | 90 ms | 11776 KB |
w15.txt | AC | 50 ms | 15616 KB |
w16.txt | AC | 54 ms | 15488 KB |
w17.txt | AC | 61 ms | 15744 KB |
w18.txt | AC | 102 ms | 11776 KB |
w2.txt | TLE | 3156 ms | 14952 KB |
w3.txt | TLE | 3156 ms | 14556 KB |
w4.txt | TLE | 3156 ms | 14328 KB |
w5.txt | TLE | 3156 ms | 14584 KB |
w6.txt | TLE | 3156 ms | 14584 KB |
w7.txt | TLE | 3156 ms | 11648 KB |
w8.txt | TLE | 3156 ms | 10880 KB |
w9.txt | AC | 361 ms | 11136 KB |