RT #include <bits/stdc++.h> using namespace std; int read() { char ch = getchar(); int x = 0, pd = 0; while (ch < '0' || ch > '9') pd |= ch == '-', ch = getchar(); while ('0' <= ch && ch <= '9') x = x * 10 + (ch ^ 48), ch = getchar(); return pd ? -x : ...