Cod sursă (job #356987)

#include <bits/stdc++.h>

using namespace std;

const int NMAX = 10005;
const int MMAX = 100005;

int Father[NMAX];
int countt;

struct edge
{
    int x,y,price;
}Edge[MMAX];
 int Answer = 0;
int N,M,K;
inline bool cmp( const edge &a , const edge &b)
{
    return a.price < b.price;
}
inline void ScanData()
{
    scanf("%d%d%d", &N ,&M , &K);

    for ( int i = 1; i <= M ; ++i)
    {
        scanf("%d%d%d", &Edge[i].x , &Edge[i].y  , &Edge[i].price);
    }
    sort(Edge+1,Edge+M+1, cmp);
    countt = M;

}
inline void Unite(int x, int y)
{
    Father[y] = x;
}

inline int Root(int Node)
{
    int R = Node;
    while(Father[R] > 0)
        R = Father[R];

    while(Father[Node] > 0)
    {
        Father[Node] = R;
        Node = R;
    }

    return Node;
}

inline void APM()
{
    memset(Father , 0 , sizeof Father);
    Answer = 0;
    for ( int i = 1; i <= countt ; ++i)
    {
        int Node1 = Edge[i].x;
        int Node2 = Edge[i].y;
        int Price = Edge[i].price;

        int Root1 = Root(Node1);
        int Root2 = Root(Node2);

        if( Root1 != Root2)
        {
            Unite(Root1,Root2);
            Answer+=Price;
        }
    }

    printf("%d\n" , Answer);
}
int main()
{
    freopen("zapada.in" , "r" ,stdin);
   freopen("zapada.out" , "w", stdout);

   ScanData();

   APM();

   for ( int i = 1 ; i <= K ; ++i)
   {
       countt++;
       M++;
       scanf("%d%d%d", &Edge[countt].x , &Edge[countt].y , &Edge[countt].price);
       sort(Edge+1,Edge+M+1,cmp);
       APM();
   }

   return 0;
}