#include <iostream> using namespace std; int table[][10] = { {0},{0},{2,4,8,6},{ 3,9,7,1 },/**/{ 4,6 },{ 0 },{ 0 },{ 7,9,3,1 },{ 8,4,2,6 },{ 9,1 } }; int main() { int a, b; while (EOF != scanf("%d %d", &a, &b)) { a = a % 10; if (0 == a || 1 == a || 5 == a || 6 == a) { printf("%d\n", a); continue; } else if (2 == a || 3 == a || 8 == a || 7 == a) { printf("%d\n", table[a][(b-1) % 4]); } else if (9 == a || 4 == a) { printf("%d\n", table[a][(b-1) % 2]); } } return 0; }
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