1038. Recover the Smallest Number (30)
Given a collection of number segments, you are supposed to recover the smallest number from them. For example, given {32, 321, 3214, 0229, 87}, we can recover many numbers such like 32-321-3214-0229-87 or 0229-32-87-321-3214 with respect to different orders of combinations of these segments, and the smallest number is 0229-321-3214-32-87.
Input Specification:
Each input file contains one test case. Each case gives a positive integer N (<=10000) followed by N number segments. Each segment contains a non-negative integer of no more than 8 digits. All the numbers in a line are separated by a space.
Output Specification:
For each test case, print the smallest number in one line. Do not output leading zeros.
Sample Input:
5 32 321 3214 0229 87
Sample Output:
22932132143287
#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int times[10];
int t=0;
bool compare1(string a,string b){
if(a==b)
return false;
int i;
int min1=min(a.size(),b.size());
for(i=0;i<min1;i++){
if(a[i]!=b[i])
return a[i]<b[i];
}
int tt=0;
if(a.size()==min1){
while(b.size()>i+tt){
if(b[i+tt]!=b[tt])
return b[i+tt]>b[tt];
tt++;
}
return true;
}
while(a.size()>i+tt){
if(a[i+tt]!=a[tt])
return a[i+tt]<a[tt];
tt++;
}
return true;
}
int main(){
int N;
cin>>N;
int i,j;
for(i=0;i<10;i++)
times[i]=0;
string *s=new string[N];
for(i=0;i<N;i++){
cin>>s[i];
times[s[i][0]-'0']++;
}
sort(s,s+N,compare1);
string t;
int fir=0;
for(i=0;i<N;i++){
if(i==0){
for(j=0;j<s[0].size();j++){
if(s[0][j]!='0')
fir=1;
if(fir==1)
t+=s[0][j];
}
}
else
t+=s[i];
}
int iszero=0;
for(i=0;i<t.size();i++)
if(t[i]!='0')
iszero=1;
if(iszero==0)
cout<<0;
else
cout<<t;
}