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  • 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<cstdio>
    #include<string>
    #include<iostream>
    #include<algorithm>
    using namespace std;
    bool cmp(string a, string b){
        return a + b < b + a;
    }
    string str[100010];
    int main(){
        int n;
        cin >> n;
        for(int i = 0; i < n; i++){
            cin >> str[i];
        } 
        sort(str,str+n,cmp);
        string ans;
        for(int i = 0; i < n; i++){
            ans += str[i];
        } 
        while(ans.size() != 0 && ans[0] == '0'){
            ans.erase(ans.begin());
        }
        if(ans.size() == 0) cout << 0;
        else cout << ans;
    }
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  • 原文地址:https://www.cnblogs.com/wanghao-boke/p/8668950.html
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