delete pics to save space

history_source/信息学奥赛一本通/1.4.1.24.cpp

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+#include<cstdio>
+#include<cmath>
+using namespace std;
+int find_(int a,int b,int n)
+{
+	a*=pow(10,n);
+	return a/b;
+}
+int sun[110];
+bool find(int *front,int *last,int n)
+{
+	int *p;
+	for(p=front;p<last;p++)
+		if(*p==n) return 1;
+	return 0;
+}
+int main()
+{
+	int a,b,n;
+	scanf("%d%d%d",&a,&b,&n);
+	int x=0,i=1;
+	while(!find(sun,sun+x,find_(a,b,i))) x++,i++;
+	printf("%d\n",x);
+	return 0;
+}