Tree(思维题)

OvO

结论为所有边权的和。
至于为什么，我不知道qwq

#include<cstdio>
#include<cstring>
#include<algorithm>
#define int long long
using namespace std;
const int maxn=2e3+1,maxnn=2e6+1;
int n; 
int fa[maxn],ans=0,len1;
int C[maxn]; 
signed main(){
    freopen("tree.in","r",stdin);
    freopen("tree.out","w",stdout);
    scanf("%lld",&n);
    for(int i=1;i<n;i++){
        int u,v,w;scanf("%lld%lld%lld",&u,&v,&w);
        ans+=w;
    }  
    printf("%lld
",ans); 
    return 0;
}