【数学】CF1796 C

Problem - 1796C - Codeforces

题意：

思路：

模拟一下样例可以发现一些规律

Code：

#include <bits/stdc++.h>#define int long longusing i64 = long long;constexpr int N = 1e6 + 10;
constexpr int mod = 998244353;void solve() {int l, r;std::cin >> l >> r;int k = log2((1.0 * r) / l);int l1 = r / (1ll << k);int l2 = r / 3 / (1ll << (k - 1));std::cout << k + 1 << " " << ((l2 - l + 1) * k * (l2 >= l) % mod+ (l1 - l + 1)) % mod << "\n";
}
signed main() {std::ios::sync_with_stdio(false);std::cin.tie(nullptr);int t = 1;std::cin >> t;while(t --) {solve();}return 0;
}