Submission #3230606
Source Code Expand
#include <bits/stdc++.h> using namespace std ; #define N 5000010 #define inf 0x3f3f3f3f int head[ N ] , cnt ; int d[ N ] , vis[ N ] , q[ N ] ; int n , m ; struct node { int to , nxt , v ; }e[ N ] ; void ins( int u , int v , int w ) { e[ ++ cnt ].to = v ; e[ cnt ].nxt = head[ u ] ; e[ cnt ].v = w ; head[ u ] = cnt ; } map<pair<int,int>,int>mp; int tot = 0 ; int get_num( int x , int y ) { if( !mp.count( make_pair( x , y ) ) ) mp[ make_pair( x , y ) ] = ++tot ; return mp[ make_pair( x , y ) ] ; } void spfa() { for( int i = 1 ; i <= tot ; i ++ ) d[ i ] = inf ; vis[ 1 ] = q[ 1 ] = 1 ; d[ 1 ] = 0 ; int l = 1 , r = 2 ; while( l < r ) { int u = q[ l ++ ] ; vis[ u ] = 0 ; for( int i = head[ u ] ; i ; i = e[ i ].nxt ) { int v = e[ i ].to ; if( d[ v ] > d[ u ] + e[ i ].v ) { d[ v ] = d[ u ] + e[ i ].v ; if( !vis[ v ] ) vis[ v ] = 1 , q[ r ++ ] = v ; } } } if( d[ n ] == inf ) puts( "-1" ) ; else printf( "%d\n" , d[ n ] / 2 ) ; } int main() { scanf( "%d%d" , &n , &m ) ; tot = n ; for( int i = 1 ; i <= m ; i ++ ) { int x , y , c ; scanf( "%d%d%d" , &x , &y , &c ) ; int n1 = get_num( x , c ) , n2 = get_num( y , c ) ; ins( x , n1 , 1 ) ; ins( n1 , x , 1 ) ; ins( n1 , y , 1 ) ; ins( y , n1 , 1 ) ; ins( n1 , n2 , 0 ) ; ins( n2 , n1 , 0 ) ; } spfa() ; }
Submission Info
Submission Time | |
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Task | E - Snuke's Subway Trip |
User | henry_y |
Language | C++14 (GCC 5.4.1) |
Score | 600 |
Code Size | 1393 Byte |
Status | AC |
Exec Time | 382 ms |
Memory | 55936 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:52:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d" , &n , &m ) ; ^ ./Main.cpp:56:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d%d" , &x , &y , &c ) ; ^
Judge Result
Set Name | Sample | All | ||
---|---|---|---|---|
Score / Max Score | 0 / 0 | 600 / 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 | 3 ms | 8448 KB |
02.txt | AC | 262 ms | 29952 KB |
03.txt | AC | 382 ms | 55936 KB |
04.txt | AC | 351 ms | 51712 KB |
05.txt | AC | 345 ms | 44032 KB |
06.txt | AC | 138 ms | 32256 KB |
07.txt | AC | 156 ms | 32384 KB |
08.txt | AC | 364 ms | 55936 KB |
09.txt | AC | 169 ms | 34560 KB |
10.txt | AC | 169 ms | 34560 KB |
11.txt | AC | 196 ms | 36736 KB |
12.txt | AC | 82 ms | 22784 KB |
13.txt | AC | 158 ms | 27392 KB |
14.txt | AC | 192 ms | 35968 KB |
15.txt | AC | 157 ms | 30208 KB |
16.txt | AC | 180 ms | 34816 KB |
17.txt | AC | 197 ms | 37120 KB |
18.txt | AC | 123 ms | 24064 KB |
19.txt | AC | 178 ms | 34816 KB |
20.txt | AC | 208 ms | 38144 KB |
21.txt | AC | 332 ms | 54784 KB |
22.txt | AC | 231 ms | 39296 KB |
23.txt | AC | 266 ms | 42880 KB |
24.txt | AC | 193 ms | 37888 KB |
25.txt | AC | 77 ms | 22912 KB |
26.txt | AC | 143 ms | 27392 KB |
27.txt | AC | 204 ms | 39296 KB |
28.txt | AC | 194 ms | 38144 KB |
29.txt | AC | 199 ms | 38784 KB |
30.txt | AC | 188 ms | 37120 KB |
31.txt | AC | 149 ms | 28160 KB |
32.txt | AC | 173 ms | 34816 KB |
33.txt | AC | 203 ms | 39040 KB |
34.txt | AC | 168 ms | 30336 KB |
35.txt | AC | 71 ms | 22784 KB |
36.txt | AC | 123 ms | 24064 KB |
37.txt | AC | 179 ms | 30848 KB |
38.txt | AC | 169 ms | 30208 KB |
sample_01.txt | AC | 3 ms | 8448 KB |
sample_02.txt | AC | 3 ms | 8448 KB |
sample_03.txt | AC | 2 ms | 6400 KB |
w1.txt | AC | 194 ms | 34944 KB |
w10.txt | AC | 362 ms | 51840 KB |
w11.txt | AC | 114 ms | 22912 KB |
w12.txt | AC | 171 ms | 24064 KB |
w13.txt | AC | 274 ms | 35584 KB |
w14.txt | AC | 353 ms | 49536 KB |
w15.txt | AC | 70 ms | 22784 KB |
w16.txt | AC | 102 ms | 22784 KB |
w17.txt | AC | 145 ms | 23296 KB |
w18.txt | AC | 224 ms | 27776 KB |
w2.txt | AC | 189 ms | 34816 KB |
w3.txt | AC | 241 ms | 38912 KB |
w4.txt | AC | 191 ms | 31104 KB |
w5.txt | AC | 358 ms | 55680 KB |
w6.txt | AC | 277 ms | 44288 KB |
w7.txt | AC | 351 ms | 51584 KB |
w8.txt | AC | 366 ms | 51840 KB |
w9.txt | AC | 368 ms | 51968 KB |