#include<bits/stdc++.h> usingnamespace std; #ifdef LOCAL #define debug(...) fprintf(stdout, ##__VA_ARGS__) #define debag(...) fprintf(stderr, ##__VA_ARGS__) #else #define debug(...) void(0) #define debag(...) void(0) #endif #define int long long inlineintread(){int x=0,f=1;char ch=getchar(); while(ch<'0'||ch>'9'){if(ch=='-')f=-1; ch=getchar();}while(ch>='0'&&ch<='9'){x=(x<<1)+ (x<<3)+(ch^48);ch=getchar();}return x*f;} #define Z(x) (x)*(x) #define pb push_back #define fi first #define se second //#define M #define mo (int)(1e9 + 7) #define N 2000010 intpw(int a, int b){ int ans = 1; while(b) { if(b & 1) ans *= a; a *= a; b >>= 1; ans %= mo; a %= mo; } return ans; } constint inv2 = pw(2, mo-2); int n, m, i, j, k, T; int A[N], a[N], b[N], o, P, l; char str[N];