12346

#include<stdio.h>

#include<time.h>

int i,j,k,a,b,u,v,n,ne=1;
int min,mincost=0,cost[9][9],parent[9];
int find(int);
int uni(int,int);
void main()
{
printf("\n\tImplementation of Kruskal's algorithm\n");
printf("\nEnter the no. of vertices:");
scanf("%d",&n);
printf("\nEnter the cost adjacency matrix:\n");
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
scanf("%d",&cost[i][j]);
if(cost[i][j]==0)
cost[i][j]=999;
}
}
printf("The edges of Minimum Cost Spanning Tree are\n"); clock_t start=clock();
while(ne < n)
{
for(i=1,min=999;i<=n;i++)
{
for(j=1;j <= n;j++)
{
if(cost[i][j] < min)
{
min=cost[i][j];
a=u=i;
b=v=j;
}
}
}
u=find(u);
v=find(v);
if(uni(u,v))
{

printf("%d edge (%d,%d) =%d\n",ne++,a,b,min);

mincost +=min;
}
cost[a][b]=cost[b][a]=999;
}
printf("\n\tMinimum cost = %d\n",mincost);
clock_t end=clock();
printf("Start time is %lf\n",(double)start);
printf("End time is %lf\n",(double)end);
printf("Total time is %lf\n",(double)(end-start));
}
int find(int i)
{
while(parent[i])
i=parent[i];
return i;
}
int uni(int i,int j)
{
if(i!=j)
{
parent[j]=i;
return 1;
}
return 0;
}


2
#include<stdio.h>

#include<time.h>

int visited[10]={0}, cost[10][10], min, mincost=0;
int i,j,ne=1, a, b, u, v;;
int main()
{
int num;
printf("\n\t\t\tPrim's Algorithm");
printf("\n\nEnter the number of nodes= ");
scanf("%d", &num);
printf("\nEnter the adjacency matrix\n\n");
for(i=1; i<=num; i++)
{
for(j=1; j<=num; j++)
{
scanf("%d", &cost[i][j]);
 if(cost[i][j]==0)
cost[i][j]=999;
}
}
clock_t start=clock();
visited[1]=1;
while(ne < num)
{
for(i=1,min=999;i<=num;i++)
for(j=1;j<=num;j++)
if(cost[i][j]< min)
if(visited[i]!=0)
{
min=cost[i][j];
a=u=i;
b=v=j;
}
printf("\n Edge %d:(%d - %d) cost:%d",ne++,a,b,min);
mincost=mincost+min;
visited[b]=1;
cost[a][b]=cost[b][a]=999;
}
printf("\n\n\n Minimun cost=%d",mincost);
clock_t end=clock();

printf("\nStart time is %lf\n",(double)start);

printf("End time is %lf\n",(double)end);
printf("Total time is %lf\n",(double)(end-start));
return 0;
}


3
#include<stdio.h>

int min(int,int);

void floyds(int p[10][10],int n)
{
int i,j,k;
for(k=1;k<=n;k++)
{
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
if(i==j)
p[i][j]=0;
else
 p[i][j]=min(p[i][j],p[i][k]+p[k][j]);
}
}
}
}
int min(int a,int b)
{
if(a<b)
 return(a);
else
return(b);
}
void main()
{
int p[10][10],w,n,u,v,i,j;;
printf("\n Enter the number of vertices:");
scanf("%d",&n);
printf("\n Matrix of input data:\n");
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
 scanf("%d",&p[i][j]);
 if(p[i][j]==0)
 p[i][j]=999;
}

floyds(p,n);

printf("\n The shortest paths are:\n");
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
 {
 if(i!=j)
 printf("\n <%d,%d>=%d",i,j,p[i][j]);
 }
}

b
#include<stdio.h>

 int max(int, int);

 void warshal(int p[10][10], int n) 
{
 int i, j, k;
 for (k = 1; k <= n; k++)
 for (i = 1; i <= n; i++)
 for (j = 1; j <= n; j++)
 p[i][j] = max(p[i][j], p[i][k] && p[k][j]);
 }
 int max(int a, int b) 
{
 if (a > b)
 return (a);
 else
 return (b);
 }
 void main() 
{
 int p[10][10] = { 0 }, n, e, u, v, i, j;
 printf("\n Enter the number of vertices:");
 scanf("%d", &n);
 printf("\n Enter the Matrix of input data: \n");
 for (i = 1; i <= n; i++) 
{
 for (j = 1; j <= n; j++)
 scanf("%d", &p[i][j]);
}
 warshal(p, n);
 printf("\n Transitive closure: \n");
 for (i = 1; i <= n; i++)
{
 for (j = 1; j <= n; j++)
 printf("%d\t", p[i][j]);
 printf("\n");
 }
}

4
#include<stdio.h>

int main ()

{
int n,a[20][20],i,j,min,u,v,s[10],d[10],k;
printf ("Enter the number of vertices\n");
scanf("%d",&n);
printf ("Enter adjacency matrix\n");
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
scanf("%d",&a[i][j]);
}
}
printf("Enter source vertex\n");
scanf("%d",&v);
for(i=1;i<=n;i++)
{
s[i]=0;
d[i]=a[v][i];
}
d[v]=0;
s[v]=1;
for(k=2;k<=n;k++)
{
min=999;
for(i=1;i<=n;i++)
{
if(d[i]<min && s[i]==0)
{
min=d[i];
u=i;
}
}
s[u]=1;
for(i=1;i<=n;i++)
{
if(s[i]==0)
{
if(d[i]>d[u]+a[u][i])

{

d[i]=d[u]+a[u][i];
}
}
}
}
for(i=1;i<=n;i++)
{
printf("%d---->%d=%d\n",v,i,d[i]);
}
}

6
#include<stdio.h>

int w[10],p[10],n;

int max(int a,int b)
{
return a>b?a:b;
}
int knap(int i,int m)
{
if(i==n) return w[i]>m?0:p[i];
if(w[i]>m) return knap(i+1,m);
return max(knap(i+1,m),knap(i+1,m-w[i])+p[i]);
}
int main()
{
int m,i,max_profit;
printf("\nEnter the no. of objects:");
scanf("%d",&n);
printf("\nEnter the knapsack capacity:");
scanf("%d",&m);
printf("\nEnter profit followed by weight:\n");
for(i=1;i<=n;i++)
scanf("%d %d",&p[i],&w[i]);
max_profit=knap(1,m);
printf("\nMax profit=%d",max_profit);
return 0;
}