1038 贪心

get到一个新的技能；

s.erase(s.begin())可以把0（这里是begin）去掉

#include <string>#include <iostream>#include <algorithm>using namespace std;bool cmp0(string a, string b) {    return a + b < b + a;}string str[10010];int main() {    int n;    scanf("%d", &n);    for(int i = 0; i < n; i++)        cin >> str[i];    sort(str, str + n, cmp0);    string s;    for(int i = 0; i < n; i++)        s += str[i];    while(s.length() != 0 && s[0] == '0')        s.erase(s.begin());    if(s.length() == 0)        cout << 0;    else        cout << s;    return 0;}