이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <vector>
#include <iostream>
#include <algorithm>
#include <cassert>
using namespace std;
const int maxn = (int)1e5+7;
int color_idx;
vector<int> adj[maxn];
vector<int> ans, sub;
vector<pair<int,int> > colors;
void dfs1(int a) {
ans[a] = colors[color_idx].second;
colors[color_idx].first--; if(colors[color_idx].first == 0) color_idx++;
for(int b : adj[a]) if(ans[b] == 0) dfs1(b);
}
void dfs2(int a, int p) {
sub[a] = 1;
for(int b : adj[a]) if(b != p) {
dfs2(b, a); sub[a] += sub[b];
}
}
void dfs3(int a) {
ans[a] = colors[color_idx].second;
colors[color_idx].first--;
for(int b : adj[a]) if(colors[color_idx].first > 0 && ans[b] == 0 && sub[b] < sub[a]) {
dfs3(b);
}
}
vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q) {
for(int i = 0; i < (int)q.size(); i++) {
adj[q[i]].push_back(p[i]);
adj[p[i]].push_back(q[i]);
}
ans.assign(n, 0);
bool two_max = true;
for(int i = 0; i < n; i++) {
if((int)adj[i].size() > 2) {
two_max = false;
}
}
colors.push_back(make_pair(a, 1));
colors.push_back(make_pair(b, 2));
colors.push_back(make_pair(c, 3));
sort(colors.begin(), colors.end());
if(two_max) {
bool found = false; color_idx = 0;
for(int i = 0; found && i < n; i++) {
if((int)adj[i].size() == 1) { found = true; dfs1(i); }
}
if(!found) dfs1(0);
assert(colors[0].first + colors[1].first + colors[2].first == 0);
return ans;
} else if((int)q.size() == n - 1) { // tree
bool found = false;
sub.resize(n);
dfs2(0, 0); // subtree size
for(int i = 0; !found && i < n; i++) {
if(sub[i] >= colors[0].first && n - sub[i] >= colors[1].first) {
found = true;
color_idx = 0;
dfs3(i);
color_idx = 1;
dfs3(0);
} else if(sub[i] >= colors[1].first && n - sub[i] >= colors[0].first) {
found = true;
color_idx = 1;
dfs3(i);
color_idx = 0;
dfs3(0);
}
}
if(found) {
for(int i = 0; i < n; i++) if(ans[i] == 0) {
ans[i] = colors[2].second;
}
}
return ans;
} else {
return ans;
}
}
int my_main() {
int n, m;
cin >> n >> m;
int a, b, c;
cin >> a >> b >> c;
vector<int> p(m), q(m);
for(int i = 0; i < m; i++) {
cin >> p[i] >> q[i];
}
vector<int> res = find_split(n, a, b, c, p, q);
for(int x : res) cout << x << " ";
cout << endl;
}
컴파일 시 표준 에러 (stderr) 메시지
split.cpp: In function 'int my_main()':
split.cpp:108:1: warning: no return statement in function returning non-void [-Wreturn-type]
108 | }
| ^
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