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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define inf 99999999
int n, m;
typedef struct graphMatrix {
int** costMatrix;
int numNodes;
} graphMatrix;
typedef struct nodeDP {
int node;
int d;
int parent;
int visited;
} nodeDP;
int cmpNDP(const void* a, const void* b)
{
nodeDP* A = (nodeDP*)a;
nodeDP* B = (nodeDP*)b;
return (A->d - B->d);
/*if (A->d > B->d) return 1;
if (A->d < B->d) return -1;*/
}
nodeDP* dijsktra(graphMatrix graph, int source)
{
nodeDP* NDP = (nodeDP*)malloc(sizeof(nodeDP) * (graph.numNodes + 1));
if (NDP == NULL)
return NULL;
for (int i = 1; i <= graph.numNodes; i++) {
NDP[i].node = i;
NDP[i].d = inf;
NDP[i].parent = -1;
NDP[i].visited = 0;
}
NDP[source].d = 0;
int position = 1;
while (position <= graph.numNodes) {
for (int i = 1; i <= graph.numNodes; i++)
if (i != source && graph.costMatrix[source][i] != inf) {
int dist = NDP[source].d + graph.costMatrix[source][i];
if (NDP[i].d > dist) {
NDP[i].d = dist;
NDP[i].parent = source;
}
}
position++;
int min = inf;
NDP[source].visited = 1;
for (int i = 1; i <= graph.numNodes; i++)
if (NDP[i].d < min && !NDP[i].visited) {
min = NDP[i].d;
source = i;
}
}
return NDP;
}
graphMatrix citire(char* filename)
{
FILE* f = fopen(filename, "r");
fscanf(f, "%d %d", &n, &m);
graphMatrix graph;
graph.numNodes = n;
graph.costMatrix = (int**)malloc((n + 1) * sizeof(int*));
for (int i = 1; i <= n; i++)
graph.costMatrix[i] = (int*)malloc((n + 1) * sizeof(int));
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++)
graph.costMatrix[i][j] = inf;
int a, b, c;
for (int i = 0; i < m; i++) {
fscanf(f, "%d %d %d", &a, &b, &c);
graph.costMatrix[a][b] = c;
}
return graph;
}
int main()
{
graphMatrix graph = citire("dijkstra.in");
/*for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++)
printf("%d ", graph.costMatrix[i][j]);
printf("\n");
}*/
nodeDP* NDP = dijsktra(graph, 1);
FILE* f = fopen("dijkstra.out", "w");
for (int i = 2; i <= n; i++) {
if (NDP[i].d == inf) {
fprintf(f, "%d ", 0);
} else {
fprintf(f, "%d ", NDP[i].d);
}
}
fclose(f);
return 0;
}