結果
問題 | No.763 Noelちゃんと木遊び |
ユーザー |
|
提出日時 | 2018-12-11 13:53:45 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 111 ms / 2,000 ms |
コード長 | 2,924 bytes |
コンパイル時間 | 669 ms |
コンパイル使用メモリ | 69,584 KB |
実行使用メモリ | 20,224 KB |
最終ジャッジ日時 | 2025-03-22 10:33:14 |
合計ジャッジ時間 | 3,326 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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ファイルパターン | 結果 |
---|---|
other | AC * 22 |
ソースコード
#include <iostream>#include <algorithm>#include <vector>#include <string.h>using namespace std;template<class T> inline void YES(T condition){ if(condition) cout << "YES" << endl; else cout << "NO" << endl; }template<class T> inline void Yes(T condition){ if(condition) cout << "Yes" << endl; else cout << "No" << endl; }template<class T> inline void POSS(T condition){ if(condition) cout << "POSSIBLE" << endl; else cout << "IMPOSSIBLE" << endl; }template<class T> inline void Poss(T condition){ if(condition) cout << "Possible" << endl; else cout << "Impossible" << endl; }template<class T> inline void First(T condition){ if(condition) cout << "First" << endl; else cout << "Second" << endl; }template<class T = string, class U = char>int character_count(T text, U character){ int ans = 0; for(U i: text){ ans += (i == character); } return ans; }long power(long base, long exponent, long module){ if(exponent % 2){ return power(base, exponent - 1, module) * base % module; }else if(exponent){long root_ans = power(base, exponent / 2, module); return root_ans * root_ans % module; }else{ return 1; }}struct position{ int y, x; }; position move_pattern[4] = {{-1, 0}, {0, 1}, {1, 0}, {0, -1}}; // double euclidean(position first, position second){return sqrt((second.x - first.x) * (second.x - first.x) + (second.y - first.y) * (second.y - first.y)); }template<class T, class U> string to_string(pair<T, U> x){ return to_string(x.first) + "," + to_string(x.second); }template<class itr> void array_output(itr start, itr goal){ string ans; for(auto i = start; i != goal; i++){ ans += to_string(*i) + " "; } ans.pop_back(); cout << ans << endl; }template<class itr> void cins(itr start, itr goal){ for(auto i = start; i != goal; i++){ cin >> (*i); } }template<class T> T gcd(T a, T b){ if(a && b){ return gcd(min(a, b), max(a, b) % min(a, b)); }else{ return a; }} template<class T> T lcm(T a, T b){return a / gcd(a, b) * b; }#define mod long(10007)#define all(x) (x).begin(), (x).end()#define bitcount(n) __builtin_popcountl(long(n))#define fcout cout << fixed << setprecision(10)#define highest(x) (63 - __builtin_clzl(x))vector<vector<int>> roads;int dp[100010][2];int move(int now, int back, bool is_cut){if(dp[now][is_cut] != -1){return dp[now][is_cut];}int ans = 0;for(int i: roads[now]){if(i != back){if(is_cut){ans += max(move(i, now, true), move(i, now, false));}else{ans += move(i, now, true);}}}return dp[now][is_cut] = ans + !is_cut;}int main(){int N;cin >> N;roads.resize(N);for(int i = 0; i < N - 1; i++){int u, v;cin >> u >> v;roads[u - 1].push_back(v - 1);roads[v - 1].push_back(u - 1);}memset(dp, -1, sizeof(dp));cout << max(move(0, -1, true), move(0, -1, false)) << endl;}