結果
問題 | No.2677 Minmax Independent Set |
ユーザー | woodywoody |
提出日時 | 2024-03-15 23:07:47 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 335 ms / 2,000 ms |
コード長 | 7,184 bytes |
コンパイル時間 | 4,257 ms |
コンパイル使用メモリ | 235,864 KB |
実行使用メモリ | 72,832 KB |
最終ジャッジ日時 | 2024-09-30 02:42:32 |
合計ジャッジ時間 | 14,423 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 1 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 1 ms
5,248 KB |
testcase_05 | AC | 267 ms
51,584 KB |
testcase_06 | AC | 272 ms
51,968 KB |
testcase_07 | AC | 269 ms
52,172 KB |
testcase_08 | AC | 257 ms
52,724 KB |
testcase_09 | AC | 266 ms
53,760 KB |
testcase_10 | AC | 262 ms
52,012 KB |
testcase_11 | AC | 258 ms
52,052 KB |
testcase_12 | AC | 171 ms
72,832 KB |
testcase_13 | AC | 294 ms
58,772 KB |
testcase_14 | AC | 305 ms
60,576 KB |
testcase_15 | AC | 335 ms
63,700 KB |
testcase_16 | AC | 294 ms
50,712 KB |
testcase_17 | AC | 292 ms
50,688 KB |
testcase_18 | AC | 157 ms
33,664 KB |
testcase_19 | AC | 194 ms
39,100 KB |
testcase_20 | AC | 52 ms
15,872 KB |
testcase_21 | AC | 213 ms
42,836 KB |
testcase_22 | AC | 13 ms
6,784 KB |
testcase_23 | AC | 3 ms
5,248 KB |
testcase_24 | AC | 2 ms
5,248 KB |
testcase_25 | AC | 1 ms
5,248 KB |
testcase_26 | AC | 2 ms
5,248 KB |
testcase_27 | AC | 2 ms
5,248 KB |
testcase_28 | AC | 267 ms
52,540 KB |
testcase_29 | AC | 289 ms
63,488 KB |
testcase_30 | AC | 2 ms
5,248 KB |
testcase_31 | AC | 2 ms
5,248 KB |
testcase_32 | AC | 2 ms
5,248 KB |
testcase_33 | AC | 2 ms
5,248 KB |
testcase_34 | AC | 2 ms
5,248 KB |
testcase_35 | AC | 2 ms
5,248 KB |
testcase_36 | AC | 2 ms
5,248 KB |
testcase_37 | AC | 2 ms
5,248 KB |
testcase_38 | AC | 2 ms
5,248 KB |
testcase_39 | AC | 3 ms
5,248 KB |
testcase_40 | AC | 4 ms
5,248 KB |
testcase_41 | AC | 6 ms
5,248 KB |
testcase_42 | AC | 11 ms
6,272 KB |
testcase_43 | AC | 21 ms
8,960 KB |
testcase_44 | AC | 44 ms
14,720 KB |
testcase_45 | AC | 104 ms
26,368 KB |
testcase_46 | AC | 284 ms
49,092 KB |
testcase_47 | AC | 290 ms
49,920 KB |
testcase_48 | AC | 281 ms
49,920 KB |
testcase_49 | AC | 284 ms
49,920 KB |
testcase_50 | AC | 73 ms
21,964 KB |
testcase_51 | AC | 5 ms
5,248 KB |
testcase_52 | AC | 227 ms
44,032 KB |
testcase_53 | AC | 207 ms
40,908 KB |
testcase_54 | AC | 5 ms
5,248 KB |
testcase_55 | AC | 325 ms
52,660 KB |
testcase_56 | AC | 289 ms
52,768 KB |
testcase_57 | AC | 292 ms
52,624 KB |
testcase_58 | AC | 278 ms
52,728 KB |
testcase_59 | AC | 282 ms
52,680 KB |
testcase_60 | AC | 140 ms
49,588 KB |
testcase_61 | AC | 143 ms
51,400 KB |
testcase_62 | AC | 138 ms
54,016 KB |
testcase_63 | AC | 148 ms
64,384 KB |
ソースコード
#include<bits/stdc++.h> #include<atcoder/all> #define rep(i,b) for(int i=0;i<b;i++) #define rrep(i,b) for(int i=b-1;i>=0;i--) #define rep1(i,b) for(int i=1;i<b;i++) #define repx(i,x,b) for(int i=x;i<b;i++) #define rrepx(i,x,b) for(int i=b-1;i>=x;i--) #define fore(i,a) for(auto& i:a) #define rng(x) (x).begin(), (x).end() #define rrng(x) (x).rbegin(), (x).rend() #define sz(x) ((int)(x).size()) #define pb push_back #define fi first #define se second #define pcnt __builtin_popcountll using namespace std; using namespace atcoder; using ll = long long; using ld = long double; template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>; template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; } template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;} bool yn(bool a) { if(a) {cout << "Yes" << endl; return true;} else {cout << "No" << endl; return false;}} #define retval(x) {cout << #x << endl; return;} #define cout2(x,y) cout << x << " " << y << endl; #define coutp(p) cout << p.fi << " " << p.se << endl; #define out cout << ans << endl; #define outd cout << fixed << setprecision(20) << ans << endl; #define outm cout << ans.val() << endl; #define outv fore(yans , ans) cout << yans << "\n"; #define outdv fore(yans , ans) cout << yans.val() << "\n"; #define assertmle(x) if (!(x)) {vi v(3e8);} #define asserttle(x) if (!(x)) {while(1){}} #define coutv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;} #define coutv2(v) fore(vy , v) cout << vy << "\n"; #define coutvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;} #define coutvm2(v) fore(vy , v) cout << vy.val() << "\n"; using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using pdd = pair<ld,ld>; using vi = vector<int>;using vd = vector<ld>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>; using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>; using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>; using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>; using mint = modint998244353; //using mint = modint1000000007; //using mint = dynamic_modint<0>; using vm = vector<mint>; using vvm = vector<vector<mint>>; vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1}; ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;} ll lcm(ll a, ll b) { return a/gcd(a,b)*b;} #define yes {cout <<"Yes"<<endl;} #define no {cout <<"No"<<endl;} const double eps = 1e-10; const ll LINF = 2001002003004005006ll; const int INF = 1001001001; #ifdef MY_LOCAL_DEBUG #include "./debug/localDebug.cpp" #define showp(p) cerr<<#p<<" = "<<p.fi<<" : "<<p.se<<endl #define show1(a) cerr<<#a<<" = "<<a<<endl #define show2(a,b) cerr<<#a<<" = "<<a<<" : "<<#b<<" = "<<b<<endl #define show3(a,b,c) cerr<<#a<<" = "<<a<<" : "<<#b<<" = "<<b<<" : "<<#c<<" = "<<c<<endl #define show4(a,b,c,d) cerr<<#a<<" = "<<a<<" : "<<#b<<" = "<<b<<" : "<<#c<<" = "<<c<<" : "<<#d<<" = "<<d<<endl #define show5(a,b,c,d,e) cerr<<#a<<" = "<<a<<" : "<<#b<<" = "<<b<<" : "<<#c<<" = "<<c<<" : "<<#d<<" = "<<d<<" : "<<#e<<" = "<<e<<endl #define DEBUG_LINE cout << "DEBUG_LINE : " << __LINE__ << endl #define showv(v) {cout<<#v<<" : "; fore(vy , v) {cout << vy << " ";} cout << endl;} #define showv2(v) {cout<<#v<<endl; fore(vy , v) cout << vy << "\n";} #define showvm(v) {cout<<#v<<" : "; fore(vy , v) {cout << vy.val() << " ";} cout << endl;} #define showvm2(v) {cout<<#v<<endl; fore(vy , v) cout << vy.val() << "\n";} #define showmat(v) {cout<<#v<<endl; fore(row , v) { fore(seg , row) cout << seg << " "; cout << endl;}} #define showmatm(v) {cout<<#v<<endl; fore(row , v) { fore(seg , row) cout << seg.val() << " "; cout << endl;}} #else #define showp(p) #define show1(a) #define show2(a,b) #define show3(a,b,c) #define show4(a,b,c,d) #define show5(a,b,c,d,e) #define DEBUG_LINE #define showv(v) #define showv2(v) #define showvm(v) #define showvm2(v) #define showmat(v) #define showmatm(v) #endif #define overload5(a,b,c,d,e,f, ...) f #define show(...) overload5(__VA_ARGS__, show5, show4, show3, show2, show1)(__VA_ARGS__) pii op(pii a, pii b){ return {a.fi + max(b.fi, b.se), a.se + b.fi}; } struct ReRooting { using F1 = function<pii(pii, pii)>; using F2 = function<pii()>; int n; // 頂点数 vvi e,tmp_edge; // e:edge情報 親は最後に入る vector<vector<pii>> dp; // dp[x][i]、iはeに連動 vector<vector<pii>> lsum; // 左(右)からの累積和 vector<int> ans; pii id = {0,1}; ReRooting(int n) : n(n),e(n),tmp_edge(n),dp(n),lsum(n),ans(n,INF){} void add_edge(int u, int v) { tmp_edge[u].pb(v); tmp_edge[v].pb(u); } pii dfs1(int x, int pre) { pii ret = id; int i = 0; fore(y , tmp_edge[x]){ if (y == pre) continue; dp[x].pb(dfs1(y , x)); e[x].pb(y); ret = op(ret , dp[x][i]); lsum[x].pb(id); i++; } if (pre != -1){ e[x].pb(pre); dp[x].pb(id); lsum[x].pb(id); } return ret; } void dfs2(int x,int pre,pii preval) { int m = sz(e[x]); if (pre != -1) dp[x][m-1] = preval; rep(i,m){ if (i==0){ lsum[x][i] = id; }else{ lsum[x][i] = lsum[x][i-1]; } lsum[x][i] = op(lsum[x][i], dp[x][i]); } if (m >= 1) ans[x] = lsum[x][m-1].se; pii now = {0,0}; rrep(i,m){ int y = e[x][i]; if (y == pre){ now.fi = dp[x][i].fi; now.se = max(dp[x][i].fi, dp[x][i].se); continue; } pii nxtval = id; if (i != 0) nxtval = lsum[x][i-1]; if (i != m-1){ nxtval.fi += now.se; nxtval.se += now.fi; } dfs2(y , x , nxtval); now.fi += dp[x][i].fi; now.se += max(dp[x][i].fi, dp[x][i].se); } return; } void solve(){ dfs1(0,-1); dfs2(0,-1,id); } }; // 全方位木dp // ReRooting<pii> rr(n,op,id) : 初期化。nは頂点数、opはmerge演算関数、idは単位元 // op,idはラムダ式で定義 // add_edge(a,b) a,b間に辺を引く // solve() dp実行、ansに答えが入る。 // dfs内は適宜変更すること void solve(){ int n; cin>>n; ReRooting rr(n); rep(i,n-1){ int a,b; cin>>a>>b; a--; b--; rr.add_edge(a,b); } if (n==1) retval(1); rr.solve(); int ans = INF; rep(i,n) chmin(ans, rr.ans[i]); out; return; } int main(){ ios::sync_with_stdio(false); cin.tie(0); int t = 1; //cin>>t; rep(i,t){ solve(); } return 0; }