#include int generateStateNum(int a, int state) { int sum = 0; int ret = 1; for (int i = 1; i <= state; i++) { sum += a * ret; ret *= 10; } return sum; } int func(int a, int state) { int sum = 0; for (int i = 1; i <= state; i++) { sum += generateStateNum(a, i); } return sum; } int main(void) { int a, state; __attribute__((unused)) int ret = scanf("%d%d", &a, &state); printf("%d\n", func(a, state)); return 0; }