이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "cyberland.h"
#include <bits/stdc++.h>
#include <vector>
#define ff first
#define ss second
using namespace std;
double ans1,ans2,ans;
vector<pair<int,int>> v[100010];
vector<int> ar;
bitset<100001> vis;
int h;
void dfs(int a,double dist,int k){
if(vis[a]) return;
vis[a]=1;
if(a==h){
ans=min(ans,dist);
return;
}
for(pair<int,int> i:v[a]){
if(ar[a]==0) dfs(i.ff,i.ss,k);
if(ar[a]==1) dfs(i.ff,dist+i.ss,k);
if(ar[a]==2){
dfs(i.ff,dist+i.ss,k);
if(k>0) dfs(i.ff,dist/2+i.ss,k-1);
}
}
vis[a]=0;
}
double solve(int N, int M, int K, int H, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> arr) {
if(N==2){
if(M>0) return c[0];
else return -1;
}
if(N==3){
bool p=false,q=false;
int d;
for(int i=0;i<M;i++){
if((x[i]==0 && y[i]==H) || (x[i]==H && y[i]==0)){
p=true;
ans1=c[i];
}
else if(x[i]==0 || y[i]==0){
if(x[i]==0) d=y[i];
else d=x[i];
if(arr[d]==0) ans2=0;
else if(arr[d]==1 || (arr[d]==2 && K<1)) ans2=c[i];
else ans2=(double)c[i]/2;
for(int j=0;j<M;j++){
if((x[j]==d && y[j]==H) || (x[j]==H && y[j]==d)){
q=true;
ans2+=c[j];
}
}
}
}
if(!p && !q) return -1;
if(!p) return ans2;
if(!q) return ans1;
return min(ans1,ans2);
}
for(int i=0;i<M;i++){
v[x[i]].push_back({y[i],c[i]});
v[y[i]].push_back({x[i],c[i]});
}
h=H;
ar=arr;
ans=1e18;
dfs(0,0,K);
for(int i=0;i<N;i++){
v[i].clear();
}
vis.reset();
if(ans==1e18) return -1;
return ans;
}
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