이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "split.h"
#include<bits/stdc++.h>
using namespace std;
using lli=long long int;
#define pb push_back
#define deb(x) ;
vector<vector<int>> adj;
vector<vector<int>> tree;
vector<bool> vis;
vector<int> sz;
vector<int> par;
void dfs(int x){
deb(x);
sz[x]++;
vis[x]=true;
for(int y: adj[x]){
if(vis[y]) continue;
tree[x].pb(y);
par[y]=x;
dfs(y);
sz[x]+=sz[y];
}
}
vector<bool> prn;
lli ind;
void dfs2(int x, int &a){
deb(x);
ind=x;
for(int y: tree[x]){
if(sz[y]>=a){
prn[x]=true;
dfs2(y,a);
break;
}
}
}
vector<bool> pos;
vector<bool> cnc;
int sz1, sz2;
void dfs3(int x, int p, int &a){
if(sz[x]>=a){
for(int y: tree[x]){
dfs3(y, x, a);
}
return;
}
for(int y: tree[x]){
dfs3(y,x,a);
}
for(int y: adj[x]){
if(y==p) continue;
if(prn[y]){
cnc[x]=true;
pos[x]=true;
break;
}
}
for(int y: tree[x]){
if(pos[y]) pos[x]=true;
}
}
void dfs4(int x, int &b, int s, vector<int> &ans){
//if(x==ind) return;
if(b<=0) return;
ans[x]=s;
b--;
for(int y: tree[x]){
if(y==ind) continue;
dfs4(y,b,s,ans);
}
}
vector<int> add;
void dfs5(int x){
if(cnc[x]) add.pb(x);
for(int y: tree[x]){
dfs5(y);
}
}
void dfs6(int x, int a){
for(int y: tree[x]){
if(pos[y]){
sz1+=sz[y];
sz2-=sz[y];
dfs5(y);
if(sz1>=a) break;
}
}
}
int extra;
void dfs7(int x, int &a, int s, vector<int> &ans){
if(ans[x]!=extra) return;
if(a<=0) return;
ans[x]=s;
a--;
for(int y: tree[x]){
if(y==ind) continue;
dfs7(y,a,s,ans);
}
}
void dfs8(int x, int &a, int s, vector<int> &ans){
if(ans[x]!=extra) return;
if(a<=0) return;
ans[x]=s;
a--;
for(int y: tree[x]){
dfs7(y,a,s,ans);
}
dfs8(par[x], a, s, ans);
}
vector<int> find_split(int n, int a1, int b1, int c1, vector<int> p, vector<int> q) {
vector<pair<int,int>> ayuda;
ayuda.pb({a1,1});
ayuda.pb({b1,2});
ayuda.pb({c1,3});
sort(ayuda.begin(), ayuda.end());
int a=ayuda[0].first;
int b=ayuda[1].first;
int c=ayuda[2].first;
adj.clear();
adj.resize(n);
int m=p.size();
for(int i=0; i<m; ++i){
adj[p[i]].pb(q[i]);
adj[q[i]].pb(p[i]);
}
sz.clear();
vis.clear();
tree.clear();
sz.resize(n,0);
vis.resize(n,0);
tree.resize(n);
par.clear();
par.resize(n,-1);
dfs(0);
prn.clear();
prn.resize(n,0);
ind=0;
deb("----------");
dfs2(0,a);
sz1=n-sz[ind];
sz2=sz[ind];
deb(sz1);
deb(sz2);
pos.clear();
cnc.clear();
pos.resize(n,0);
cnc.resize(n,0);
vector<int> ans (n,ayuda[2].second);
if(n-sz[ind]>=a){
if(sz[ind]>=n-sz[ind]){
dfs4(0, a, ayuda[0].second, ans);
dfs4(ind, b, ayuda[1].second, ans);
}
else{
dfs4(0, b, ayuda[1].second, ans);
dfs4(ind, a, ayuda[0].second, ans);
}
return ans;
}
dfs3(ind, -1, a);
add.clear();
dfs6(ind, a);
extra=ayuda[2].second;
if(sz1<a){
vector<int> no(n,0);
return no;
}
if(sz1>=sz2){
dfs7(0, b, ayuda[1].second, ans);
for(int x: add){
dfs8(x, b, ayuda[1].second, ans);
}
dfs7(ind, a, ayuda[0].second, ans);
}
else{
dfs7(0, a, ayuda[0].second, ans);
for(int x: add){
dfs8(x, a, ayuda[0].second, ans);
}
dfs7(ind, b, ayuda[1].second, ans);
}
return ans;
}
컴파일 시 표준 에러 (stderr) 메시지
split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:130:6: warning: unused variable 'c' [-Wunused-variable]
130 | int c=ayuda[2].first;
| ^
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