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#include <iostream> #include <vector> #include <unordered_map> #include <algorithm> using namespace std; const int MOD = 1e9 + 7; vector<int> a; vector<vector<int>> g; vector<vector<int>> dp; vector<int> subtree_sum; int k; void dfs(int u, int parent) { dp[u][0] = 1; subtree_sum[u] = a[u]; for (int v : g[u]) { if (v != parent) { dfs(v, u); vector<int> tmp(k + 1, 0); for (int i = 0; i <= k; ++i) { if (dp[u][i]) { for (int j = 0; j <= k - i; ++j) { if (dp[v][j]) { tmp[i + j] = (tmp[i + j] + (long long)dp[u][i] * dp[v][j]) % MOD; } } } } for (int i = 0; i <= k; ++i) { dp[u][i] = (dp[u][i] + tmp[i]) % MOD; } } } for (int i = k; i >= a[u]; --i) { dp[u][i] = (dp[u][i] + dp[u][i - a[u]]) % MOD; } } int main() { int n, m; cin >> n >> m >> k; a.resize(n + 1); g.resize(n + 1); dp.resize(n + 1, vector<int>(k + 1, 0)); subtree_sum.resize(n + 1, 0); for (int i = 1; i <= n; ++i) { cin >> a[i]; } for (int i = 0; i < m; ++i) { int x, y; cin >> x >> y; g[x].push_back(y); g[y].push_back(x); } long long result = 0; dfs(1, -1); for (int i = 1; i <= n; ++i) { result = (result + dp[i][k]) % MOD; } cout << result << endl; return 0; } Tree Function 🌳🌲🌴

class SegmentTree: def init(self, data): self.n = len(data) self.tree = [0] * (2 * self.n) self.build(data) def build(self, data): for i in range(self.n): self.tree[self.n + i] = data[i] for i in range(self.n - 1, 0, -1): self.tree[i] = max(self.tree[2 * i], self.tree[2 * i + 1]) def range_max(self, left, right): left += self.n right += self.n max_val = 0 while left < right: if left % 2: max_val = max(max_val, self.tree[left]) left += 1 if right % 2: right -= 1 max_val = max(max_val, self.tree[right]) left //= 2 right //= 2 return max_val def calculate_total_xp(N, A, Bonus): seg_tree = SegmentTree() seg_tree.init(Bonus) last_seen = [-1] * (N // 2 + 1) right_multiple = [-1] * N for i in range(N - 1, -1, -1): power = A[i] next_pos = float('inf') for multiple in range(power, N // 2 + 1, power): if last_seen[multiple] != -1: next_pos = min(next_pos, last_seen[multiple]) if next_pos != float('inf'): right_multiple[i] = next_pos last_seen[power] = i total_xp = 0 for i in range(N): if right_multiple[i] != -1: max_bonus = seg_tree.range_max(i, right_multiple[i] + 1) total_xp += max_bonus return total_xp N = int(input().strip()) A = [int(input().strip()) for _ in range(N)] Bonus = [int(input().strip()) for _ in range(N)] result = calculate_total_xp(N, A, Bonus) print(result) Some help

#include <bits/stdc++.h> using namespace std; vector<int> sieve(int max_number) { vector<bool> is_prime(max_number + 1, true); vector<int> primes; for (int number = 2; number <= max_number; ++number) { if (is_prime[number]) { primes.push_back(number); for (int multiple = number * number; multiple <= max_number; multiple += number) { is_prime[multiple] = false; } } } return primes; } int count_divisors(int number, const vector<int>& primes) { int divisor_count = 0; int prime_count = primes.size(); for (int subset = 1; subset < (1 << prime_count); ++subset) { long long least_common_multiple = 1; int bit_count = 0; for (int bit = 0; bit < prime_count; ++bit) { if (subset & (1 << bit)) { least_common_multiple *= primes[bit]; bit_count++; if (least_common_multiple > number) break; } } if (least_common_multiple > number) continue; if (bit_count % 2 == 1) divisor_count += number / least_common_multiple; else divisor_count -= number / least_common_multiple; } return divisor_count; } int count_non_divisors(int number, const vector<int>& primes) { if (number == 0) return 0; return number - count_divisors(number, primes); } int count_non_divisors_range(int max_prime, int left, int right) { vector<int> primes = sieve(max_prime); int right_count = count_non_divisors(right, primes); int left_count = count_non_divisors(left - 1, primes); return right_count - left_count; } int main() { int max_prime; string left_str, right_str; cin >> max_prime >> left_str >> right_str; cout << count_non_divisors_range(max_prime, stoi(left_str), stoi(right_str)) << endl; return 0; } Divisible string

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