牛客练习赛59 A~~D

#include<iostream>
using namespace std;
string s1 = "XiaoQiao";
string s2 = "XiaoHuiHui";
int main()
{
    string s;
    cin>>s;
    int j = 0,k = 0;
    for(int i = 0 ;i<s.size();i++)
    {
        if(s[i]==s1[j])j++;
        if(s[i]==s2[k])k++;
     
    }if(j==s1.size()&&k==s2.size())cout<<"Happy"<<endl;
    else cout<<"emm";
     
}

#include<bits/stdc++.h>
#define N 100000
using namespace std;
typedef long long LL;


LL a[N];
int main()
{
    int n;
    cin>>n;
    for(int i=1;i<=n;++i)
    {
        int x,y;
        cin>>x>>y;
        a[i] = 1LL*x*x*y+1LL*y*y*(y-2*x);
    }
    sort(a+1,a+n+1);
    LL ans = 0;
    for(int i=1;i<n;++i) ans += abs(a[i]-a[i+1]);
    cout<<ans<<endl;
    return 0;
}

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


int main() {
    int T;
    ll a,b;
    cin>>T;
    while(T--){
        cin>>a>>b;
        ll lima=a/2;
        ll ans=(a+b)/5;
        if((a+b)%5==0&&a&1)--ans;
        ans=min(lima,ans);
        ans=min(b,ans);
        cout<<ans<<endl;
    }
    return 0;
}

#include<iostream>
using namespace std;

int main()
{
    int t;scanf("%d",&t);
    while(t--)
    {
        long long int  n,x=3;
        scanf("%lld",&n);
        while(x<n)
            x=x*4+1;
        if(n<=x/2)
            cout<<"XiaoQiao"<<endl;
        else
            cout<<"XiaoHuiHui"<<endl;
    }
    return 0;
}