Submission #2860746
Source Code Expand
#include<bits/stdc++.h> using namespace std; #define fi first #define se second #define FOR(a, b, c) for(int a = b; a <= c; ++a) #define pb push_back #define mp make_pair typedef pair<int, int> ii; typedef pair<int, ii> iii; const int N = 2e5 + 10; const int oo = 1e9; struct state{ int dist, u, ci; }; int n, m; map<int, int> dp[N]; vector<ii> vi[N]; void solve() { deque<state> pq; pq.push_back({0, 1, 0}); while(!pq.empty()) { state cur = pq.front(); pq.pop_front(); int u = cur.u, ci = cur.ci; if(!dp[u].count(0) || (dp[u][0] > cur.dist) ){ dp[u][0] = cur.dist; pq.push_back({cur.dist, u, 0}); } if(ci) { int pos = lower_bound(vi[u].begin(), vi[u].end(), ii(ci, 0)) - vi[u].begin(); while(pos < vi[u].size() && vi[u][pos].fi == ci) { int v = vi[u][pos].se; if(!dp[v].count(ci) || dp[v][ci] > cur.dist) { dp[v][ci] = cur.dist; pq.push_front({cur.dist, v, ci}); } pos ++; } } else { for(ii v: vi[u]) { if(!dp[v.se].count(v.fi) || dp[v.se][v.fi] > cur.dist + 1) { dp[v.se][v.fi] = cur.dist + 1; pq.push_back({cur.dist + 1, v.se, v.fi}); } } } } int ans = oo; for(auto v: dp[n]) ans = min(ans, v.se); if(ans == oo) printf("-1"); else printf("%d", ans); } signed main() { //freopen("test.inp", "r", stdin); scanf("%d%d", &n, &m); FOR(i, 1, m) { int u, v, ci; scanf("%d%d%d", &u, &v, &ci); vi[u].pb(ii(i, v)); vi[v].pb(ii(i, u)); } for(int i = 1; i <= n; ++i) sort(vi[i].begin(), vi[i].end()); solve(); }
Submission Info
Submission Time | |
---|---|
Task | E - Snuke's Subway Trip |
User | Vinhspm |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1843 Byte |
Status | WA |
Exec Time | 356 ms |
Memory | 44532 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:59:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ ./Main.cpp:61:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int u, v, ci; scanf("%d%d%d", &u, &v, &ci); ^
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 | 7 ms | 14336 KB |
02.txt | WA | 356 ms | 39424 KB |
03.txt | AC | 250 ms | 43904 KB |
04.txt | AC | 86 ms | 20608 KB |
05.txt | WA | 247 ms | 43904 KB |
06.txt | WA | 81 ms | 31616 KB |
07.txt | WA | 110 ms | 33280 KB |
08.txt | AC | 249 ms | 44288 KB |
09.txt | AC | 113 ms | 33408 KB |
10.txt | AC | 112 ms | 33536 KB |
11.txt | AC | 293 ms | 43132 KB |
12.txt | AC | 332 ms | 40568 KB |
13.txt | AC | 307 ms | 40952 KB |
14.txt | WA | 281 ms | 43520 KB |
15.txt | AC | 296 ms | 43388 KB |
16.txt | WA | 291 ms | 43392 KB |
17.txt | WA | 298 ms | 43000 KB |
18.txt | AC | 320 ms | 40444 KB |
19.txt | WA | 298 ms | 43380 KB |
20.txt | WA | 297 ms | 43648 KB |
21.txt | AC | 315 ms | 43388 KB |
22.txt | WA | 301 ms | 42744 KB |
23.txt | WA | 280 ms | 43008 KB |
24.txt | WA | 298 ms | 43132 KB |
25.txt | AC | 330 ms | 40568 KB |
26.txt | AC | 308 ms | 40952 KB |
27.txt | WA | 275 ms | 43520 KB |
28.txt | WA | 308 ms | 43388 KB |
29.txt | WA | 290 ms | 43520 KB |
30.txt | AC | 297 ms | 43000 KB |
31.txt | WA | 319 ms | 40444 KB |
32.txt | AC | 303 ms | 43380 KB |
33.txt | WA | 303 ms | 43648 KB |
34.txt | WA | 295 ms | 43260 KB |
35.txt | AC | 330 ms | 40568 KB |
36.txt | AC | 320 ms | 40952 KB |
37.txt | WA | 281 ms | 43520 KB |
38.txt | WA | 316 ms | 43388 KB |
sample_01.txt | AC | 6 ms | 14336 KB |
sample_02.txt | AC | 6 ms | 14336 KB |
sample_03.txt | AC | 6 ms | 14336 KB |
w1.txt | WA | 293 ms | 42852 KB |
w10.txt | AC | 103 ms | 23808 KB |
w11.txt | WA | 216 ms | 36824 KB |
w12.txt | WA | 200 ms | 36736 KB |
w13.txt | WA | 181 ms | 37376 KB |
w14.txt | AC | 133 ms | 32256 KB |
w15.txt | WA | 216 ms | 36696 KB |
w16.txt | WA | 199 ms | 36608 KB |
w17.txt | WA | 179 ms | 37376 KB |
w18.txt | WA | 164 ms | 39040 KB |
w2.txt | WA | 304 ms | 42844 KB |
w3.txt | WA | 246 ms | 44532 KB |
w4.txt | WA | 242 ms | 44532 KB |
w5.txt | AC | 250 ms | 44532 KB |
w6.txt | WA | 245 ms | 44532 KB |
w7.txt | WA | 220 ms | 36628 KB |
w8.txt | WA | 205 ms | 36608 KB |
w9.txt | WA | 185 ms | 37376 KB |