delete pics to save space

history_source/信息学奥赛一本通/1.6.1.17.cpp

@@ -0,0 +1,35 @@
+#include<iostream>
+#include<string>
+using namespace std;
+long long turn(string num,int j)
+{
+	long long ans=0;
+	int i=0;
+	if(num[0]=='-') i++;
+	for(;i<num.size();i++) ans=ans*j+num[i]-'0';
+	if(num[0]=='-') ans=-ans;
+	return ans;
+}
+bool can(string num,int j)
+{
+	int i=0;
+	if(num[0]=='-') i++;
+	for(;i<num.size();i++) if(num[i]-'0'>=j) return 0;
+	return 1;
+}
+int main()
+{
+	string a,b,c;
+	cin>>a>>b>>c;
+	for(int i=2;i<=16;i++)
+	{
+		if(can(a,i)&&can(b,i)&&can(c,i)&&turn(a,i)*turn(b,i)==turn(c,i))
+		{
+			cout<<i<<endl;
+			return 0;
+		}
+	}
+	cout<<0<<endl;
+	return 0;
+}
+