标签:str 偶数 print string san char ORC ble mes
水题:
链接:https://codeforces.com/contest/1291/problem/A
题意:给一个字符数组,删去数组中的一些数,使得剩下的数字的和为偶数,其中的数字有偶数多个奇数且首尾数字为奇数
找两个奇数就满足题意了:
代码:
#include <cstdio>
#include <iostream>
#include <algorithm>
#include <cstring>
using namespace std;
#define maxx 1010
const int maxn=3e5+10;
int n;
int main()
{
int t;
scanf("%d",&t);
while(t--)
{
scanf("%d",&n);
char s[maxn];
scanf("%s",s);
string ch="";
int flag=0;
for(int i=0; i<n; i++)
{
if((s[i]-‘0‘)&1)
ch+=s[i];
if(ch.size()>=2)
{
flag=1;
break;
}
}
if(flag)
cout<<ch<<endl;
else printf("-1\n");
}
return 0;}
codeforces round #616 div2 A (Even but not even)水题
标签:str 偶数 print string san char ORC ble mes
原文地址:https://www.cnblogs.com/sweetlittlebaby/p/12661437.html