标签:style http color os io ar for sp 代码
题意:输入两个整数A和C,求最小的整数B使得lcm(A, B) = C,如果无解,输出“NO SULUTION”。
思路:lcm(A, B) * gcd(A, B) = A * B转化为C / A = B / gcd(A, B),所以可以枚举B的倍数。
代码:
#include <iostream> #include <cstdio> #include <cmath> #include <algorithm> using namespace std; int a, c; int gcd(int a, int b) { return b == 0 ? a : gcd(b, a % b); } int main() { int cas; scanf("%d", &cas); while (cas--) { scanf("%d%d", &a, &c); if (c % a != 0) { printf("NO SOLUTION\n"); } else { int b = c / a; int flag = 0; for (int i = b; i <= c; i += b) { if (b == i / gcd(i, a)) { printf("%d\n", i); break; } } } } return 0; }
标签:style http color os io ar for sp 代码
原文地址:http://blog.csdn.net/u011345461/article/details/39102699