#include /// /// 入力された数字を返す /// /// int ReadNum() { int negate = 0; char c = getchar(); int num = 0; int numCnt = 0; while (c != '\n') { if (c == '-') { negate = 1; } else { num = num * 10 + c - '0'; } c = getchar(); } if (negate == 1) { num *= -1; } return num; } int main() { int works = ReadNum(); int n = ReadNum(); int leftDay = n; for (int i = 0;i < n;i++) { works -= works / (leftDay * leftDay); leftDay--; if(leftDay == 1)printf("%d\n",works); } }