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The description you provided outlines a programming task for finding a flight itinerary based on specified criteria. Here's a breakdown of the task: Description: This
The description you provided outlines a programming task for finding a flight itinerary based on specified criteria. Here's a breakdown of the task:
Description:
This task involves finding flight itineraries between two cities source and destination
A list of flights is given. Each flight has a from, to and price field.
You need to determine all possible routes from src to dest with up to k stops and return these routes along with the total price for each.
Input Format:
First line: Three integers, src dest, and k which specify the source city index, destination city index, and the maximum number of stops allowed, respectively.
Following lines: Lists of flights where each list consists of flights in the format fromi toi pricei
Output Format:
Output all possible routes from src to dest with at most k stops, listing the flights and the total price.
Constraints:
n where n is the number of cities.
The total number of flights is n n
Flight data format: from to price with price within a valid range.
Each city index is valid and within the bounds.
To solve this, we can use a graph traversal technique such as a modified depthfirst search DFS or breadthfirst search BFS which considers the maximum k stops constraint. Each node in the graph represents a city, and each edge represents a flight.
Here's a basic C implementation that you can use as a starting point. This version sets up the problem and uses a simple DFS to explore routes from src to dest with constraints on the number of stops.
sample input
n src dst k
srcdstprice
#include
#include
#include
#define MAXCITIES
#define MAXFLIGHTS n
typedef struct
int from;
int to;
int price;
Flight;
Flight flightsMAXFLIGHTS;
int flightcount ;
int visitedMAXCITIES;
int mincost INTMAX;
Flight pathMAXCITIES;
int pathlength ;
int n src dest, k;
void addflightint from, int to int price
flightsflightcountfrom from;
flightsflightcountto to;
flightsflightcountprice price;
flightcount;
void printrouteFlight path int length, int totalprice
printf totalprice;
for int i ; i length; i
printfd d d pathifrom, pathito pathiprice;
printf
;
void dfsint currentcity, int depth, int totalprice
if depth k return; k
if currentcity dest
printroutepath pathlength, totalprice;
if totalprice mincost
mincost totalprice;
return;
for int i ; i flightcount; i
if flightsifrom currentcity && visitedflightsito
visitedflightsito;
pathpathlength flightsi;
dfsflightsito depth totalprice flightsiprice;
pathlength;
visitedflightsito;
int main
scanfd d d d &n &src &dest, &k;
int from, to price;
while scanfd d d &from, &to &price EOF
addflightfrom to price;
visitedsrc;
dfssrc;
if mincost INTMAX
printf;
else
printfd
mincost;
return ;
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