結果
問題 | No.898 tri-βutree |
ユーザー | au7777 |
提出日時 | 2022-03-30 18:18:24 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 702 ms / 4,000 ms |
コード長 | 3,481 bytes |
コンパイル時間 | 4,082 ms |
コンパイル使用メモリ | 232,200 KB |
実行使用メモリ | 25,088 KB |
最終ジャッジ日時 | 2024-11-15 09:03:30 |
合計ジャッジ時間 | 17,662 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
(要ログイン)
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 | 507 ms
25,088 KB |
testcase_01 | AC | 3 ms
6,016 KB |
testcase_02 | AC | 4 ms
5,888 KB |
testcase_03 | AC | 4 ms
6,016 KB |
testcase_04 | AC | 5 ms
6,144 KB |
testcase_05 | AC | 4 ms
6,016 KB |
testcase_06 | AC | 4 ms
5,888 KB |
testcase_07 | AC | 681 ms
19,200 KB |
testcase_08 | AC | 683 ms
19,328 KB |
testcase_09 | AC | 690 ms
19,156 KB |
testcase_10 | AC | 684 ms
19,328 KB |
testcase_11 | AC | 677 ms
19,328 KB |
testcase_12 | AC | 679 ms
19,328 KB |
testcase_13 | AC | 692 ms
19,328 KB |
testcase_14 | AC | 682 ms
19,328 KB |
testcase_15 | AC | 702 ms
19,328 KB |
testcase_16 | AC | 695 ms
19,456 KB |
testcase_17 | AC | 680 ms
19,328 KB |
testcase_18 | AC | 670 ms
19,328 KB |
testcase_19 | AC | 677 ms
19,200 KB |
testcase_20 | AC | 671 ms
19,328 KB |
testcase_21 | AC | 673 ms
19,328 KB |
ソースコード
#include <bits/stdc++.h> #include <atcoder/all> typedef long long int ll; typedef long long int ull; #define MP make_pair using namespace std; using namespace atcoder; typedef pair<ll, ll> P; // const ll MOD = 998244353; const ll MOD = 1000000007; // using mint = modint998244353; using mint = modint1000000007; const double pi = 3.1415926536; const int MAX = 2000003; long long fac[MAX], finv[MAX], inv[MAX]; void COMinit() { fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (int i = 2; i < MAX; i++){ fac[i] = fac[i - 1] * i % MOD; inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; finv[i] = finv[i - 1] * inv[i] % MOD; } } // 二項係数計算 long long COM(int n, int k){ if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD; } ll gcd(ll x, ll y) { if (y == 0) return x; else if (y > x) { return gcd (y, x); } else return gcd(x % y, y); } ll lcm (ll x, ll y) { return x / gcd(x, y) * y; } ll my_sqrt(ll x) { ll m = 0; ll M = 3000000001; while (M - m > 1) { ll now = (M + m) / 2; if (now * now <= x) { m = now; } else { M = now; } } return m; } ll keta(ll n) { ll ret = 0; while (n) { n /= 10; ret++; } return ret; } ll ceil(ll n, ll m) { // n > 0, m > 0 ll ret = n / m; if (n % m) ret++; return ret; } ll pow_ll(ll x, ll n) { if (n == 0) return 1; if (n % 2) { return pow_ll(x, n - 1) * x; } else { ll tmp = pow_ll(x, n / 2); return tmp * tmp; } } vector<P> e[100001]; int db[100001][18]; int dep[100001]; ll ct[100001]; void dfs(int par, int cur, int de, ll cst) { db[cur][0] = par; dep[cur] = de; ct[cur] = cst; for (auto x : e[cur]) { if (x.first == par) continue; dfs(cur, x.first, de + 1, cst + x.second); } } int anc(int pos, int num) { int now = pos; for (int i = 0; i < 18; i++) { if ((num >> i) & 1) { now = db[now][i]; } } return now; } int com_anc(int x, int y) { int nx = x; int ny = y; if (dep[nx] > dep[ny]) { nx = anc(nx, dep[nx] - dep[ny]); } else if (dep[nx] < dep[ny]) { ny = anc(ny, dep[ny] - dep[nx]); } // cout << "hi " << x << ' ' << y << ' ' << nx << ' ' << ny << endl; int M = 100001; int m = -1; while (M - m > 1) { int mid = (M + m) / 2; if (anc(nx, mid) == anc(ny, mid)) { M = mid; } else { m = mid; } } return anc(nx, M); } ll dist(int x, int y) { return ct[x] + ct[y] - 2 * ct[com_anc(x, y)]; } int main() { int n; cin >> n; for (int i = 0; i <= n - 2; i++) { ll u, v, w; cin >> u >> v >> w; e[u].push_back(P(v, w)); e[v].push_back(P(u, w)); } dfs(0, 0, 0, 0); for (int j = 1; j < 18; j++) { for (int i = 0; i < n; i++) { db[i][j] = db[db[i][j - 1]][j - 1]; } } int q; cin >> q; for (int i = 0; i <= q - 1; i++) { int x, y, z; cin >> x >> y >> z; cout << (dist(x, y) + dist(y, z) + dist(z, x)) / 2 << endl; } // for (int i = 0; i < n; i++) { // for (int j = 0; j < n; j++) { // cout << i << ' ' << j << ' ' << com_anc(i, j) << endl; // } // } return 0; }