Find minimum weight valid edge .
int min = INT_MAX , a = -1 , b = -1 ; for ( int i = 0 ; i < V ; i ++ ) { for ( int j = 0 ; j < V ; j ++ ) { if ( cost [ i ] [ j ] < min ) { if ( isValidEdge ( i , j , inMST ) ) { min = cost [ i ] [ j ] ; a = i ; b = j ; } } } } if ( a != -1 && b != -1 ) { printf ( " Edge ▁ % d : ( % d , ▁ % d ) ▁ cost : ▁ % d ▁ STRNEWLINE " , edge_count ++ , a , b , min ) ; mincost = mincost + min ; inMST [ b ] = inMST [ a ] = true ; } } printf ( " Minimum cost = % d " }