题解 | #买房子#

#include<cstdio>
int main(){
	int N, K;
	while (scanf("%d %d", &N, &K) != EOF){
		float V = 200;
		int s=N;
		int i = 0;
		for (; i < 21; i++){
			if (s >= V){
				printf("%d\n", i+1);
				break;
			}
			V = V+V*K/100;
			s = s+N;
		}
		if (i == 21){
			printf("Impossible\n");
		}
	}
}