結果
問題 | No.912 赤黒木 |
ユーザー | snuke |
提出日時 | 2019-10-18 21:58:42 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 503 ms / 3,000 ms |
コード長 | 2,926 bytes |
コンパイル時間 | 2,508 ms |
コンパイル使用メモリ | 203,384 KB |
最終ジャッジ日時 | 2025-01-07 22:52:54 |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 30 |
コンパイルメッセージ
main.cpp: In function ‘void read()’: main.cpp:67:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 67 | scanf("%d%d",&a,&b); | ~~~~~^~~~~~~~~~~~~~ main.cpp: In function ‘int main()’: main.cpp:99:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 99 | scanf("%d",&n); | ~~~~~^~~~~~~~~
ソースコード
#include <bits/stdc++.h> #define fi first #define se second #define rep(i,n) for(int i = 0; i < (n); ++i) #define rrep(i,n) for(int i = 1; i <= (n); ++i) #define drep(i,n) for(int i = (n)-1; i >= 0; --i) #define srep(i,s,t) for (int i = s; i < t; ++i) #define rng(a) a.begin(),a.end() #define rrng(a) a.rbegin(),a.rend() #define maxs(x,y) (x = max(x,y)) #define mins(x,y) (x = min(x,y)) #define limit(x,l,r) max(l,min(x,r)) #define lims(x,l,r) (x = max(l,min(x,r))) #define isin(x,l,r) ((l) <= (x) && (x) < (r)) #define pb push_back #define eb emplace_back #define sz(x) (int)(x).size() #define pcnt __builtin_popcountll #define uni(x) x.erase(unique(rng(x)),x.end()) #define snuke srand((unsigned)clock()+(unsigned)time(NULL)); #define show(x) cout<<#x<<" = "<<x<<endl; #define PQ(T) priority_queue<T,v(T),greater<T> > #define bn(x) ((1<<x)-1) #define dup(x,y) (((x)+(y)-1)/(y)) #define newline puts("") #define v(T) vector<T> #define vv(T) v(v(T)) using namespace std; typedef long long int ll; typedef unsigned uint; typedef unsigned long long ull; typedef pair<int,int> P; typedef tuple<int,int,int> T; typedef vector<int> vi; typedef vector<vi> vvi; typedef vector<ll> vl; typedef vector<P> vp; typedef vector<T> vt; inline int in() { int x; scanf("%d",&x); return x;} template<typename T>inline istream& operator>>(istream&i,v(T)&v) {rep(j,sz(v))i>>v[j];return i;} template<typename T>string join(const v(T)&v) {stringstream s;rep(i,sz(v))s<<' '<<v[i];return s.str().substr(1);} template<typename T>inline ostream& operator<<(ostream&o,const v(T)&v) {if(sz(v))o<<join(v);return o;} template<typename T1,typename T2>inline istream& operator>>(istream&i,pair<T1,T2>&v) {return i>>v.fi>>v.se;} template<typename T1,typename T2>inline ostream& operator<<(ostream&o,const pair<T1,T2>&v) {return o<<v.fi<<","<<v.se;} template<typename T>inline ll suma(const v(T)& a) { ll res(0); for (auto&& x : a) res += x; return res;} const double eps = 1e-10; const ll LINF = 1001002003004005006ll; const int INF = 1001001001; #define dame { puts("-1"); return 0;} #define yn {puts("YES");}else{puts("NO");} const int MX = 200005; vvi to; vvi t2; vi x; int n; void read() { to = vvi(n); rep(i,n-1) { int a,b; scanf("%d%d",&a,&b); --a; --b; to[a].pb(b); to[b].pb(a); } } vi dp[MX]; int dfs(int v, int p=-1) { int res = x[v]; vi d(3,INF); d[0] = 0; if (x[v]) d[1] = 0; for (int u : to[v]) { if (u == p) continue; int r = dfs(u,v); res += r; vi e(3,INF); swap(d,e); vi& a = dp[u]; rep(i,3)rep(j,3) { int ni = i+j; if (ni >= 3) continue; mins(d[ni],e[i]+a[j]); } } rep(i,3) if ((i+res)&1) d[i]++; dp[v] = d; // cerr<<v<<" "<<d<<endl; return res; } int main() { scanf("%d",&n); read(); t2 = to; read(); x = vi(n); rep(i,n) if (sz(to[i])%2) x[i] = 1; to = t2; dfs(0); cout<<dp[0][2]+(n-1)<<endl; return 0; }