codeforces 712B Memory and Trident

2019-05-19

11:33:45

加油！！！坚持

昨天只做了两道题，但是学了一下dfs和c++

做了一下微信小游戏的ui，和游戏文档策划

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main()
{
    string s;
    cin >> s;
    ll i, j;
    ll u = 0;
    ll d = 0;
    ll r = 0;
    ll l = 0;
    if (s.length()&1)
    {
        cout << -1;
        return 0;
    }
    for(i = 0; i < s.length(); i++)
    {
        if(s[i] == 'u')
        {
            u++;
        }
        else if(s[i] == 'd')
        {
            d++;
        }
        else if(s[i] == 'l')
        {
            l++;
        }
        else
        {
            r++;
        }
    }
    ll x = abs(u - d);
    ll y = abs(r - l);
    cout << (x + y) / 2;
    return 0;
}