#include #include #include #include #include #include #include #include #include #include #include #include #include #pragma warning(disable:4996) typedef long long ll; #define MIN(a, b) ((a)>(b)? (b): (a)) #define MAX(a, b) ((a)<(b)? (b): (a)) #define LINF 9223300000000000000 #define INF 2140000000 const long long MOD = 1000000007; using namespace std; int main(int argc, char* argv[]) { int n,m; scanf("%d%d", &n, &m); ll s[1005]={0}; int i,j,k; for(i=0; i