// A // 六位数字ABCDEF均不同,A不能为0, 算[n, m]之间满足AB + CD = EF的六位数有几个 // 暴力枚举 + check #include<bits/stdc++.h> using namespace std; typedef long long ll; const int maxn = 1e5+5; const int inf = 1e7; const ll mod = 1e9+7; map<int, int> mp; int main(){ int n, m; scanf("%d%d", &...