結果
問題 | No.1507 Road Blocked |
ユーザー | tsuyu93 |
提出日時 | 2021-05-14 23:22:36 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 76 ms / 2,000 ms |
コード長 | 11,006 bytes |
コンパイル時間 | 5,288 ms |
コンパイル使用メモリ | 280,608 KB |
最終ジャッジ日時 | 2025-01-21 12:16:14 |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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
6,820 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 40 ms
14,988 KB |
testcase_04 | AC | 68 ms
11,536 KB |
testcase_05 | AC | 64 ms
11,624 KB |
testcase_06 | AC | 68 ms
11,540 KB |
testcase_07 | AC | 60 ms
11,668 KB |
testcase_08 | AC | 54 ms
11,664 KB |
testcase_09 | AC | 63 ms
11,536 KB |
testcase_10 | AC | 65 ms
11,532 KB |
testcase_11 | AC | 62 ms
11,664 KB |
testcase_12 | AC | 54 ms
11,664 KB |
testcase_13 | AC | 58 ms
11,664 KB |
testcase_14 | AC | 59 ms
11,536 KB |
testcase_15 | AC | 67 ms
11,532 KB |
testcase_16 | AC | 62 ms
11,532 KB |
testcase_17 | AC | 60 ms
11,536 KB |
testcase_18 | AC | 65 ms
11,660 KB |
testcase_19 | AC | 59 ms
11,664 KB |
testcase_20 | AC | 59 ms
11,608 KB |
testcase_21 | AC | 56 ms
11,532 KB |
testcase_22 | AC | 60 ms
11,540 KB |
testcase_23 | AC | 53 ms
11,536 KB |
testcase_24 | AC | 61 ms
11,536 KB |
testcase_25 | AC | 60 ms
11,540 KB |
testcase_26 | AC | 66 ms
11,668 KB |
testcase_27 | AC | 63 ms
11,536 KB |
testcase_28 | AC | 76 ms
11,684 KB |
testcase_29 | AC | 62 ms
11,536 KB |
testcase_30 | AC | 60 ms
11,532 KB |
testcase_31 | AC | 65 ms
11,540 KB |
testcase_32 | AC | 64 ms
11,664 KB |
コンパイルメッセージ
main.cpp: In function ‘void scan(int&)’: main.cpp:102:25: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 102 | void scan(int& a){ scanf("%d", &a); } | ~~~~~^~~~~~~~~~ main.cpp: In function ‘void scan(unsigned int&)’: main.cpp:103:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 103 | void scan(unsigned& a){ scanf("%u", &a); } | ~~~~~^~~~~~~~~~ main.cpp: In function ‘void scan(long int&)’: main.cpp:104:26: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 104 | void scan(long& a){ scanf("%ld", &a); } | ~~~~~^~~~~~~~~~~ main.cpp: In function ‘void scan(long long int&)’: main.cpp:105:31: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 105 | void scan(long long& a){ scanf("%lld", &a); } | ~~~~~^~~~~~~~~~~~ main.cpp: In function ‘void scan(long long unsigned int&)’: main.cpp:106:40: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 106 | void scan(unsigned long long& a){ scanf("%llu", &a); } | ~~~~~^~~~~~~~~~~~ main.cpp: In function ‘void scan(float&)’: main.cpp:108:27: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 108 | void scan(float& a){ scanf("%f", &a); } | ~~~~~^~~~~~~~~~ main.cpp: In function ‘void scan(double&)’: main.cpp:109:28: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused
ソースコード
/*** author: tsuyu93* started: 2021-05-14 23:09:14* 継続は力なり、雨だれ石を穿つ* make the impossible possible**/#pragma GCC optimize("Ofast")#include<bits/stdc++.h>#include<atcoder/all>using namespace atcoder;// #include <boost/multiprecision/cpp_dec_float.hpp>// #include <boost/multiprecision/cpp_int.hpp>// namespace mpb = boost::multiprecision;// using bint = mpb::cpp_int;// // 仮数部が1024ビットの浮動小数点数型(TLEしたら小さくする)// using Real = mpb::number<mpb::cpp_dec_float<1024>>;#ifdef __HOGE__#pragma region macro#endifusing namespace std;using ll = long long;using ld = long double;using ull = unsigned long long;using uint = unsigned;using pll = pair<ll, ll>;using pli = pair<ll, int>;using pii = pair<int, int>;using pld = pair<ll, ld>;using ppiii = pair<pii, int>;using ppiill = pair<pii, ll>;using ppllll = pair<pll, ll>;using pplii = pair<pli, int>;using mii = map<int, int>;using dll = deque<ll>;using qll = queue<ll>;using pqll = priority_queue<ll>;using pqrll = priority_queue<ll, vector<ll>, greater<ll>>;using pqrpll = priority_queue<pll, vector<pll>, greater<pll>>;using vint = vector<int>;using vbool = vector<bool>;using vstr = vector<string>;using vll = vector<ll>;using vld = vector<ld>;using vpll = vector<pll>;using vvll = vector<vector<ll>>;using vvint = vector<vector<int>>;using vvld = vector<vector<ld>>;using vvbool = vector<vbool>;using vvstr = vector<vstr>;using vvpll = vector<vector<pll>>;#define REP(i,n) for(ll i=0;i<ll(n);i++)#define REPD(i,n) for(ll i=n-1;i>=0;i--)#define FOR(i,a,b) for(ll i=a;i<=ll(b);i++)#define FORD(i,a,b) for(ll i=a;i>=ll(b);i--)#define overload4(_1,_2,_3,_4,name,...) name#define overload3(_1,_2,_3,name,...) name#define rep1(n) for(ll i=0;i<n;++i)#define rep2(i,n) for(ll i=0;i<n;++i)#define rep3(i,a,b) for(ll i=a;i<b;++i)#define rep4(i,a,b,c) for(ll i=a;i<b;i+=c)#define rep(...) overload4(__VA_ARGS__,rep4,rep3,rep2,rep1)(__VA_ARGS__)#define rrep1(n) for(ll i=n;i--;)#define rrep2(i,n) for(ll i=n;i--;)#define rrep3(i,a,b) for(ll i=b;i-->(a);)#define rrep4(i,a,b,c) for(ll i=(a)+((b)-(a)-1)/(c)*(c);i>=(a);i-=c)#define rrep(...) overload4(__VA_ARGS__,rrep4,rrep3,rrep2,rrep1)(__VA_ARGS__)#define each1(i,a) for(auto&&i:a)#define each2(x,y,a) for(auto&&[x,y]:a)#define each3(x,y,z,a) for(auto&&[x,y,z]:a)#define each(...) overload4(__VA_ARGS__,each3,each2,each1)(__VA_ARGS__)#define all1(i) begin(i),end(i)#define all2(i,a) begin(i),begin(i)+a#define all3(i,a,b) begin(i)+a,begin(i)+b#define all(...) overload3(__VA_ARGS__,all3,all2,all1)(__VA_ARGS__)#define rall1(i) (i).rbegin(),(i).rend()#define rall2(i,k) (i).rbegin(),(i).rbegin()+k#define rall3(i,a,b) (i).rbegin()+a,(i).rbegin()+b#define rall(...) overload3(__VA_ARGS__,rall3,rall2,rall1)(__VA_ARGS__)#define SUM(...) accumulate(all(__VA_ARGS__),0LL)#define ALL(x) x.begin(),x.end()#define rALL(x) x.rbegin(),x.rend()#define SIZE(x) ll(x.size())#define Sort(a) sort(all(a))#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)#define ULL(...) ull __VA_ARGS__;in(__VA_ARGS__)#define STR(...) string __VA_ARGS__;in(__VA_ARGS__)#define CHR(...) char __VA_ARGS__;in(__VA_ARGS__)#define DBL(...) double __VA_ARGS__;in(__VA_ARGS__)#define LD(...) ld __VA_ARGS__;in(__VA_ARGS__)int scan(){ return getchar(); }#define fs first#define sc second#define endl '\n'#define elif else if#define ADD_OVERFLOW(a, b) __builtin_add_overflow_p (a, b, (decltype((a)+(b))) 0)#define SUB_OVERFLOW(a, b) __builtin_sub_overflow_p (a, b, (decltype((a)+(b))) 0)#define MUL_OVERFLOW(a, b) __builtin_mul_overflow_p (a, b, (decltype((a)+(b))) 0)void scan(int& a){ scanf("%d", &a); }void scan(unsigned& a){ scanf("%u", &a); }void scan(long& a){ scanf("%ld", &a); }void scan(long long& a){ scanf("%lld", &a); }void scan(unsigned long long& a){ scanf("%llu", &a); }void scan(char& a){ do{ a = getchar(); }while(a == ' ' || a == '\n'); }void scan(float& a){ scanf("%f", &a); }void scan(double& a){ scanf("%lf", &a); }void scan(long double& a){ scanf("%Lf", &a); }void scan(vector<bool>& a){ for(unsigned i = 0; i < a.size(); i++){ int b; scan(b); a[i] = b; } }void scan(char a[]){ scanf("%s", a); }void scan(string& a){ cin >> a; }template<class T> void scan(vector<T>&);template<class T, size_t size> void scan(array<T, size>&);template<class T, class L> void scan(pair<T, L>&);template<class T, size_t size> void scan(T(&)[size]);template<class T> void scan(vector<T>& a){ for(auto&& i : a) scan(i); }template<class T> void scan(deque<T>& a){ for(auto&& i : a) scan(i); }template<class T, size_t size> void scan(array<T, size>& a){ for(auto&& i : a) scan(i); }template<class T, class L> void scan(pair<T, L>& p){ scan(p.first); scan(p.second); }template<class T, size_t size> void scan(T (&a)[size]){ for(auto&& i : a) scan(i); }template<class T> void scan(T& a){ cin >> a; }void in(){}template <class Head, class... Tail> void in(Head& head, Tail&... tail){ scan(head); in(tail...); }void print(){ putchar(' '); }void print(bool a){ printf("%d", a); }void print(int a){ printf("%d", a); }void print(unsigned a){ printf("%u", a); }void print(long a){ printf("%ld", a); }void print(long long a){ printf("%lld", a); }void print(unsigned long long a){ printf("%llu", a); }void print(char a){ printf("%c", a); }void print(char a[]){ printf("%s", a); }void print(const char a[]){ printf("%s", a); }void print(float a){ printf("%.15f", a); }void print(double a){ printf("%.15f", a); }void print(long double a){ printf("%.15Lf", a); }void print(const string& a){ for(auto&& i : a) print(i); }template<class T> void print(const complex<T>& a){ if(a.real() >= 0) print('+'); print(a.real()); if(a.imag() >= 0) print('+'); print(a.imag());print('i'); }template<class T> void print(const vector<T>&);template<class T, size_t size> void print(const array<T, size>&);template<class T, class L> void print(const pair<T, L>& p);template<class T, size_t size> void print(const T (&)[size]);template<class T> void print(const vector<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }template<class T> void print(const deque<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }template<class T, size_t size> void print(const array<T, size>& a){ print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i);} }template<class T, class L> void print(const pair<T, L>& p){ print(p.first); putchar(' '); print(p.second); }template<class T, size_t size> void print(const T (&a)[size]){ print(a[0]); for(auto i = a; ++i != end(a); ){ putchar(' '); print(*i); } }template<class T> void print(const T& a){ cout << a; }int out(){ putchar('\n'); return 0; }template<class T> int out(const T& t){ print(t); putchar('\n'); return 0; }template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); putchar(' '); out(tail...); return 0; }#ifdef DEBUGinline ll __lg(ull x){ return 63 - __builtin_clzll(x); }#define debug(...) { print(#__VA_ARGS__); print(":"); out(__VA_ARGS__); }#else#define debug(...) void(0)#endif#define INF32 2147483647 //2.147483647x10^{9}:32bit整数のinf#define INF64 9223372036854775807 //9.223372036854775807x10^{18}:64bit整数のinfconst ll MOD = 1000000007;const int inf = 1e9;const ll INF = (1LL<<61);const ll MAXR = 100000; //10^5:配列の最大のrangeconst ld PI = acos(-1);inline void Yes(bool b = true) { cout << (b ? "Yes" : "No") << '\n'; }inline void YES(bool b = true) { cout << (b ? "YES" : "NO") << '\n'; }inline void OKNG(bool b = true) { cout << (b ? "OK" : "NG") << '\n'; }inline void GAme(bool b = true) { cout << (b ? "First" : "Second") << '\n'; }inline void gAme(bool b = true) { cout << (b ? "first" : "second") << '\n'; }inline void Takahashi_Aoki(bool b = true) { cout << (b ? "Takahashi" : "Aoki") << '\n'; }inline void takahashi_aoki(bool b = true) { cout << (b ? "takahashi" : "aoki") << '\n'; }inline void possible(bool i = true){ cout << (i?"possible":"impossible") << '\n'; }inline void Possible(bool i = true){ cout << (i?"Possible":"Impossible") << '\n'; }inline void POSSIBLE(bool i = true){ cout << (i?"POSSIBLE":"IMPOSSIBLE") << '\n'; }template<typename A, typename B> inline bool chmin(A& a, B b) {if (a > b) {a = b;return true;}return false;}template<typename A, typename B> inline bool chmax(A& a, B b) {if (a < b) {a = b;return true;}return false;}template<class T> auto min(const T& a){ return *min_element(a.begin(),a.end()); }template<class T> auto max(const T& a){ return *max_element(a.begin(),a.end()); }template<typename T> T power(T a, T b) {T res=1;while (b>0) {if (b&1){res*=a;}b/=2;a*=a;}return res;}long long powmod(long long a, long long b) {long long res=1;while (b>0) {if (b&1){res*=a;res%=MOD;}b/=2;a*=a;a%=MOD;}return res;}template<typename T> T powmod(T a, T b,T m) {T res=1;while (b>0) {if (b&1){res*=a;res%=m;}b/=2;a*=a;a%=m;}return res%m;}template<typename T> T nlcm(const vector<T> &a) {T res;res = a[0];for (ll i = 1; i < (ll)a.size(); i++) {res = lcm(res, a[i]);}return res;}template<typename T> T ngcd(const vector<T> &a){T res;res = a[0];for(ll i = 1; i < (ll)a.size() && res != 1; i++) {res = gcd(a[i], res);}return res;}template<typename T> T sqr(T x){T r=sqrt(x)-1;while((r+1)*(r+1)<=x)r++;return r;}template<typename T> T bit_length(T a){T k = 0;while(a){k++;a/=2;}return k;}template<typename T> T isqrt(T n){T a = 0, r = 0;for(T s = bit_length(n)-(bit_length(n)%2?1:2); s >= 0;s-=2){T t = ((n >> s) & 3);r = ((r << 2) | t);T c = ((a << 2) | 1);int b = (r >= c);if(b){r -= c;}a = ((a << 1) | b);}return a;}int popcount(long long a){return __builtin_popcountll(a);}int popcount(int a){return __builtin_popcount(a);}template<typename T> T ceil(T a, T b) {if(b < 0) a = -a, b = -b;return (a >= 0 ? (a + b - 1) / b : a / b);}template<typename T> T floor(T a, T b) {if(b < 0) a = -a, b = -b;return (a >= 0 ? a / b : (a - b + 1) / b);}#ifdef __HOGE__#pragma endregion#endifusing mint = modint998244353;signed main(){ios::sync_with_stdio(false);cin.tie(nullptr);//cout << fixed << setprecision(15);ll N;cin >> N;vvll G(N);vpll edge;rep(i,N-1){ll a,b;cin >> a >> b;a--;b--;G[a].emplace_back(b);G[b].emplace_back(a);edge.emplace_back(a,b);}vll ch(N,0);auto dfs = [&](auto f, ll n, ll p)->ll{ch[n] = 1;for(auto nn :G[n]){if(nn==p)continue;ch[n] += f(f,nn,n);}return ch[n];};dfs(dfs,0,-1);mint ans = 0;for(auto[a,b] : edge){if(ch[a]>ch[b])swap(a,b);ans += ch[a]*(ch[a]-1)/2;ans += (N-ch[a])*(N-ch[a]-1)/2;}ans /= N*(N-1)/2;ans/=N-1;cout << ans.val() << endl;return 0;}