#include <stdio.h>
#include <stdlib.h>
const int inf = 999999;
int k, a, b, u, v, n, ne = 1;
int mincost = 0;
int cost[3][3] = {{0, 10, 20},{12, 0,15},{16, 18, 0}};
int  p[9] = {0};
int applyfind(int i)
{
    while(p[i] != 0)
        i=p[i];
    return i;
}
int applyunion(int i,int j)
{
    if(i!=j) {
        p[j]=i;
        return 1;
    }
    return 0;
}
int main()
{
    n = 3;
    int i, j;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (cost[i][j] == 0) {
                cost[i][j] = inf;
            }
        }
    }
    printf("Minimum Cost Spanning Tree: \n");
    while(ne < n) {
        int min_val = inf;
        for(i=0; i<n; i++) {
            for(j=0; j <n; j++) {
                if(cost[i][j] < min_val) {
                    min_val = cost[i][j];
                    a = u = i;
                    b = v = j;
                }
            }
        }
        u = applyfind(u);
        v = applyfind(v);
        if(applyunion(u, v) != 0) {
            printf("%d -> %d\n", a, b);
            mincost +=min_val;
        }
        cost[a][b] = cost[b][a] = 999;
        ne++;
    }
    printf("Minimum cost = %d",mincost);
    return 0;
}