#include #include #include #include #include #include #include #include #define LL long long #define pb push_back #define lm 16005 #define MOD 1000000007 using namespace std; int a[1001][1001]; int n,m; int main() { //freopen("data.txt", "r", stdin); scanf("%d%d",&n,&m); for(int i=0; i