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Re:这么简单的题目为什么给我WA??难道我PRIM错了???In Reply To:这么简单的题目为什么给我WA??难道我PRIM错了??? Posted by:kikif at 2007-09-14 10:42:20 > #include <iostream>
> #include <fstream>
> using namespace std;
>
> int n;
> int mark[110];
> int cost[110][110];
>
> int total;
>
>
> void prim(){
> mark[1]=1;
> int dest[110];
> int i,j,k;
>
> for(i=2;i<=n;i++){
> dest[i]=cost[1][i];
> }
> for(i=1;i<n;i++){
> int min=1000000;
> int node=-1;
> for(j=1;j<=n;j++){
> if(mark[j]==0&&dest[j]<min){
> min=dest[j];
> node=j;
> }
> }
> mark[node]=1;
> total+=min;
> for(j=1;j<=n;j++){
> if(mark[j]==0&&dest[j]>cost[node][j]){
> dest[j]=cost[node][j];
> }
> }
>
> }
> }
>
>
>
>
> void main(){
> // ifstream cin("data.txt");
> while(cin>>n){
> int i,j,k;
>
> for(i=1;i<=n;i++){
> for(j=1;j<=n;j++){
> cin>>cost[i][j];
> }
> }
> total=0;
> prim();
> cout<<total<<endl;
>
> }
> }
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