SHPATH - The Shortest Path
You are given a list of cities. Each direct connection between two cities has its transportation cost (an integer bigger than 0). The goal is to find the paths of minimum cost between pairs of cities. Assume that the cost of each path (which is the sum of costs of all direct connections belonging to this path) is at most 200000. The name of a city is a string containing characters a, ..., z and is at most 10 characters long.
Input
s [the number of tests <= 10] n [the number of cities <= 10000] NAME [city name] p [the number of neighbours of city NAME] nr cost [nr - index of a city connected to NAME (the index of the first city is 1)] [cost - the transportation cost] r [the number of paths to find <= 100] NAME1 NAME2 [NAME1 - source, NAME2 - destination] [empty line separating the tests]
Output
cost [the minimum transportation cost from city NAME1 to city NAME2 (one per line)]
Example
Input: 1 4 gdansk 2 2 1 3 3 bydgoszcz 3 1 1 3 1 4 4 torun 3 1 3 2 1 4 1 warszawa 2 2 4 3 1 2 gdansk warszawa bydgoszcz warszawa Output: 3 2
Warning: large Input/Output data, be careful with certain languages
hide comments
akash_9:
2023-12-02 06:59:50
Anyone wondering, use Djikstra's for each path. Gives TLE for Flloyd Warshall; |
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kuderrahul:
2023-08-26 16:18:49
Note to self
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devilsblast:
2023-03-29 20:59:52
using simple priority queue with multiple query will help and directed with be accepted and undirected also ok there are no critical test cases if you are using simple set or simple queue or simple algorithm(nor set neither queue) then it will give tle |
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yag:
2023-01-11 11:14:00
Polska gurom !!!!!
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wttc:
2022-12-27 07:27:25
Note:
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kazi_rasel13:
2022-12-16 10:54:55
anyone give me a testcase..
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eroy_cotonou:
2021-12-21 18:53:47
Is python code possible for this problem ?
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loser_404:
2021-08-13 08:32:56
Is the graph directed or undirected? why both of the solution get accepted? |
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vivekbillore:
2021-08-01 21:51:28
just use priority queue to avoid TLE , it is faster than using set in dijkstra |
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Waseem Ahmed:
2021-06-26 12:44:01
Finally got it accepted.
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Added by: | Darek Dereniowski |
Date: | 2004-05-10 |
Time limit: | 1.5s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All |
Resource: | DASM Programming League 2003 (problemset 11) |