結果

問題 No.1103 Directed Length Sum
ユーザー heno239heno239
提出日時 2020-07-25 12:33:57
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 3,225 bytes
コンパイル時間 1,314 ms
コンパイル使用メモリ 117,968 KB
実行使用メモリ 171,316 KB
最終ジャッジ日時 2024-06-27 02:41:43
合計ジャッジ時間 10,385 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
このコードへのチャレンジ
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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 11 ms
19,072 KB
testcase_01 AC 10 ms
19,176 KB
testcase_02 WA -
testcase_03 AC 189 ms
50,528 KB
testcase_04 AC 429 ms
43,328 KB
testcase_05 AC 657 ms
61,348 KB
testcase_06 AC 232 ms
34,816 KB
testcase_07 AC 48 ms
22,888 KB
testcase_08 AC 76 ms
24,704 KB
testcase_09 AC 31 ms
21,248 KB
testcase_10 AC 110 ms
26,904 KB
testcase_11 AC 399 ms
45,564 KB
testcase_12 AC 240 ms
34,988 KB
testcase_13 AC 111 ms
27,164 KB
testcase_14 AC 26 ms
20,712 KB
testcase_15 AC 179 ms
31,396 KB
testcase_16 AC 459 ms
48,880 KB
testcase_17 AC 479 ms
50,204 KB
testcase_18 AC 105 ms
26,828 KB
testcase_19 AC 412 ms
46,348 KB
testcase_20 AC 36 ms
21,760 KB
testcase_21 AC 65 ms
24,228 KB
testcase_22 AC 332 ms
41,344 KB
testcase_23 AC 190 ms
32,260 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function 'void solve()':
main.cpp:107:13: warning: 'root' may be used uninitialized [-Wmaybe-uninitialized]
  107 |         int root;
      |             ^~~~

ソースコード

diff #

#include<iostream>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<utility>
#include<cassert>
#include<complex>
#include<numeric>
using namespace std;

//#define int long long
typedef long long ll;

typedef unsigned long long ul;
typedef unsigned int ui;
constexpr ll mod = 1000000007;
const ll INF = mod * mod;
typedef pair<int, int>P;
#define stop char nyaa;cin>>nyaa;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
#define all(v) (v).begin(),(v).end()
typedef pair<ll, ll> LP;
typedef long double ld;
typedef pair<ld, ld> LDP;
const ld eps = 1e-12;
const ld pi = acos(-1.0);

ll mod_pow(ll x, ll n,ll m) {
	ll res = 1;
	while (n) {
		if (n & 1)res = res * x % m;
		x = x * x % m; n >>= 1;
	}
	return res;
}
struct modint {
	ll n;
	modint() :n(0) { ; }
	modint(ll m) :n(m) {
		if (n >= mod)n %= mod;
		else if (n < 0)n = (n % mod + mod) % mod;
	}
	operator int() { return n; }
};
bool operator==(modint a, modint b) { return a.n == b.n; }
modint operator+=(modint& a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; }
modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; }
modint operator*=(modint& a, modint b) { a.n = ((ll)a.n * b.n) % mod; return a; }
modint operator+(modint a, modint b) { return a += b; }
modint operator-(modint a, modint b) { return a -= b; }
modint operator*(modint a, modint b) { return a *= b; }
modint operator^(modint a, int n) {
	if (n == 0)return modint(1);
	modint res = (a * a) ^ (n / 2);
	if (n % 2)res = res * a;
	return res;
}

ll inv(ll a, ll p) {
	return (a == 1 ? 1 : (1 - p * inv(p % a, a)) / a + p);
}
modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); }

const int max_n = 1010000;
modint fact[max_n], factinv[max_n];
void init_f() {
	fact[0] = modint(1);
	for (int i = 0; i < max_n - 1; i++) {
		fact[i + 1] = fact[i] * modint(i + 1);
	}
	factinv[max_n - 1] = modint(1) / fact[max_n - 1];
	for (int i = max_n - 2; i >= 0; i--) {
		factinv[i] = factinv[i + 1] * modint(i + 1);
	}
}
modint comb(int a, int b) {
	if (a < 0 || b < 0 || a < b)return 0;
	return fact[a] * factinv[b] * factinv[a - b];
}

void solve(){
	int n; cin >> n;
	vector<vector<int>> G(n);
	vector<int> cnt(n);
	rep(i, n - 1) {
		int a, b; cin >> a >> b; a--; b--;
		G[a].push_back(b);
		cnt[b]++;
	}
	int root;
	rep(i, n)if (cnt[i] == 0)root = i;
	ll ans = 0;
	function<int(int, int,int)> dfs = [&](int id, int fr, int dep)->int{
		int res = 1;
		for (int to : G[id]) {
			int c = dfs(to, id, dep + 1);
			ans += (ll)c * dep;
			res += c;
		}
		return res;
	};
	dfs(root, -1, 1);
	cout << ans << "\n";
	
}




signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	//cout << fixed << setprecision(10);
	//init_f();
	//cout << grandy(2, 3, false, false) << "\n";
	//int t; cin >> t; rep(i, t)
	solve();
	return 0;
}
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