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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#527215#6330. XOR Reachablesolar_express#Compile Error//C++202.4kb2024-08-22 12:14:102024-08-22 12:14:12

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你现在查看的是最新测评结果

  • [2024-08-22 12:14:12]
  • 评测
  • [2024-08-22 12:14:10]
  • 提交

answer

#include<bits/stdc++.h>
#define N 100005
#define ll long long 
using namespace std;
int n,m,K,Q;
int rt,tot,ch[N*60][2];
ll ans[N*60],curans;
vector<pair<int,int> > tr[N*60];
void push(int &x,pair<int,int> e){
    if(!x) x=++tot;
    // cerr<<"new "<<x<<endl;
    tr[x].push_back(e);
}
void solve(int &x,int val,int dep,pair<int,int> e){
    if(!x) x=++tot;
    if(dep==-1){
        tr[x].push_back(e);
        // cerr<<x<<endl;
        return;
    }
    int c=(val>>dep)&1;
    if(K&(1<<dep)){
        // cerr<<x<<" fk "<<dep<<endl;
        // cerr<<(c^1)<<endl;
        push(ch[x][c],e);
        solve(ch[x][c^1],val,dep-1,e);
    }else{
        // cerr<<c<<endl;
        solve(ch[x][c],val,dep-1,e);
    }
}
int fa[N],siz[N];
int find(int x){
    return x==fa[x]?x:find(fa[x]);
}
struct node{
    int pos,fa,siz;
};
void dfs(int x,int dep){
    ll oans=curans;
    vector<node> tmp;
    for(auto e:tr[x]){
        int a=e.first,b=e.second;
        a=find(a),b=find(b);
        if(siz[a]<siz[b]) swap(a,b);
        if(a!=b){
            tmp.push_back((node){a,fa[a],siz[a]});
            tmp.push_back((node){b,fa[b],siz[b]});
            fa[b]=a;
            curans-=1ll*siz[a]*siz[a]+1ll*siz[b]*siz[b];
            // assert(curans>=0);
            siz[a]+=siz[b];
            curans+=1ll*siz[a]*siz[a];
        }
    }
    ans[x]=curans;
    if(ch[x][0]&&dep>=0) dfs(ch[x][0],dep-1);
    if(ch[x][1]&&dep>=0) dfs(ch[x][1],dep-1);
    curans=oans;
    for(int i=tmp.size()-1;i>=0;--i){
        int p=tmp[i].pos;
        fa[p]=tmp[i].fa;
        siz[p]=tmp[i].siz;
    }
}
ll qry(int x,int val,int dep){
    // cerr<<x<<endl;
    if(dep==-1) return ans[x];
    // for(auto e:tr[x])
    //     cerr<<dep<<" "<<e.first<<" "<<e.second<<endl;
    int c=(val>>dep)&1;
    if(ch[x][c]) return qry(ch[x][c],val,dep-1);
    else return ans[x];
}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>m>>K;
    --K;
    for(int i=1;i<=m;++i){
        int a,b,c;
        cin>>a>>b>>c;
        solve(rt,c,29,make_pair(a,b));
    }
    for(int i=1;i<=n;++i) fa[i]=i,siz[i]=1;
    curans=n;
    dfs(rt,29);
    cin>>Q;
    for(int i=1;i<=Q;++i){
        int v;
        cin>>v;
        if(k==0) cout<<"0\n";
        else cout<<(qry(rt,v,29)-n)/2<<'\n';
    }
    return 0;
}
/*
4 3 5
1 3 4
2 4 3
3 4 5
1
0
*/

Details

answer.code: In function ‘int main()’:
answer.code:92:12: error: ‘k’ was not declared in this scope
   92 |         if(k==0) cout<<"0\n";
      |            ^