If a machine can save only 3 significant digits, the float numbers 12300 and 12358.9 are considered equal since they are both saved as 0.123×105 with simple chopping. Now given the number of significant digits on a machine and two float numbers, you are supposed to tell if they are treated equal in that machine.
Input Specification:
Each input file contains one test case which gives three numbers N, A and B, where N (<100) is the number of significant digits, and A and B are the two float numbers to be compared. Each float number is non-negative, no greater than 10100, and that its total digit number is less than 100.
Output Specification:
For each test case, print in a line YES
if the two numbers are treated equal, and then the number in the standard form 0.d[1]...d[N]*10^k
(d[1]
>0 unless the number is 0); or NO
if they are not treated equal, and then the two numbers in their standard form. All the terms must be separated by a space, with no extra space at the end of a line.
Note: Simple chopping is assumed without rounding.
Sample Input 1:
3 12300 12358.9
Sample Output 1:
YES 0.123*10^5
Sample Input 2:
3 120 128
Sample Output 2:
NO 0.120*10^3 0.128*10^3
#include <iostream> #include <bits/stdc++.h> using namespace std; int n;//有效位 string deal(string s,int& e) { int k=0; //s的下标 while(s.length()>0 &&s[0]=='0') { s.erase(s.begin()); } if(s[0]=='.') { s.erase(s.begin()); while(s.length()>0 &&s[0]=='0') { s.erase(s.begin()); e--; } } else { while(k<s.length() && s[k]!='.') { k++; e++; } if(k<s.length()) { s.erase(s.begin()+k); } } if(s.length()==0) { e = 0; } int num = 0; k =0 ; string res; while(num<n) { if(k<s.length()) res+=s[k++]; else res+='0'; num++; } return res; } int main() { string s1,s2,s3,s4; cin>>n>>s1>>s2; int e1 = 0,e2 = 0; s3 = deal(s1,e1); s4 = deal(s2,e2); if(s3==s4 && e1==e2) { cout<<"YES 0."<<s3<<"*10^"<<e1<<endl; } else { cout<<"NO 0."<<s3<<"*10^"<<e1<<" 0."<<s4<<"*10^"<<e2<<endl; } return 0; }