8 求月利率

include

include<string.h>

include<stdio.h>

include

include <ctype.h>

using namespace std;

int main() {
int a, b, c;

cin >> a >> b >> c;
double low = 0.0, high = 300.0, mid;
while (high - low > 0.001) {
	mid = (low + high) / 2;
	double t = a;
	for (int i = 0; i < c; i++) {
		t += t * mid / 100;
		t -= b;
	}
	
	if (t >0) { high = mid; }
	
	else { low = mid; }
}

cout << a << b << c <<low<<high<< endl;
printf("%.1f", (low + high) / 2);
return 0;

}