4/5邀请赛的选拔赛，闷声滚大粗

A-HDU2710
cdmSB
这题题目明确告诉你有一组数据
结果数据tm全是多组的
卡了两个小时，最后加一个循环读入A了，= =
cdmSB

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <queue>
#include <cstring>
#include <cmath>
using namespace std;
const int N=200000;
int prime[N+100],len,n,Max=0;
int ans=1;
bool v[N+100];
void get_prime(){
    for (int i=2;i<N;i++){
        if (!v[i]) prime[++len]=i;
        for (int j=1;j<=len&&i*prime[j]<N;j++){
            v[i*prime[j]]=1;
            if (i%prime[j]==0) break;
        }
    }
}
void Do(int x){
    if (x==1){
        if (Max<1) Max=1,ans=x;
        return;
    }
    for (int i=1;i<=len&&prime[i]<=x;i++){
        if (x%prime[i]==0){
            if (prime[i]>Max) Max=prime[i],ans=x;
        }
    }
}
int main(){
    get_prime();
    for (;~scanf("%d",&n);){
            Max=0; ans=0;
    for (int i=1;i<=n;i++){
        int x;
        scanf("%d",&x);
        Do(x);
    }
    printf("%d
",ans);
    }
    return 0;
}

C HDU 5095
蠢到不敢相信
直接输出就好了

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <queue>
#include <cstring>
#include <cmath>
using namespace std;
int T;
int main(){
    scanf("%d",&T);
    for (;T--;){
        bool flag=0;
        int c;
        for (char x='p';x<='z';x++){
            if (x=='s'||x=='t') continue;
            scanf("%d",&c);
            if (c==0) continue;
            if (c>0&&flag){
                if (c==1) printf("+%c",x);
                else printf("+%d%c",c,x);
                flag=1;
            }else{
                if (c==1||c==-1){
                    if (c==1) printf("%c",x);
                    if (c==-1) printf("-%c",x);
                }
                else printf("%d%c",c,x);
                flag=1;
            }
        }
        scanf("%d",&c);
        if (c!=0){
            if (c>0&&flag){printf("+%d",c);}
            else{printf("%d",c);}
        }
        puts("");
    }
}

D HDU 4287
写的非常不优雅

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <queue>
#include <cstring>
#include <cmath>
using namespace std;
const int N=10000;
int T,n,m;
int a[N];
int num[1000000];
int Map[256];
int scanc(){
    char ch=getchar();
    int x=0;
    for (;ch<'a'||ch>'z';ch=getchar());
    for (;ch>='a'&&ch<='z';ch=getchar()) x=x*10+Map[ch];
    return x;
}
int main(){
    scanf("%d",&T);
    for (int i='a';i<='c';i++) Map[i]=2;
    for (int i='d';i<='f';i++) Map[i]=3;
    for (int i='g';i<='i';i++) Map[i]=4;
    for (int i='j';i<='l';i++) Map[i]=5;
    for (int i='m';i<='o';i++) Map[i]=6;
    for (int i='p';i<='s';i++) Map[i]=7;
    for (int i='t';i<='v';i++) Map[i]=8;
    for (int i='w';i<='z';i++) Map[i]=9;
    for (;T--;){
        scanf("%d%d",&n,&m);
        memset(num,0,sizeof(num));
        for (int i=1;i<=n;i++) scanf("%d",&a[i]),num[a[i]]=1;
        for (int i=1;i<=m;i++){
            int x=scanc();
            if (num[x]>0) num[x]++;
        }
        for (int i=1;i<=n;i++) printf("%d
",num[a[i]]-1);
    }
    return 0;
}

J HDU 1711

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <queue>
#include <cstring>
#include <cmath>
using namespace std;
const int N=1000086;
int a[N],b[N],f[N];
int n,m;
bool flag=0;
void Find(int *T,int *P){
    int j=0;
    for (int i=0;i<n;i++){
        for (;j&&P[j]!=T[i];) j=f[j];
        if (P[j]==T[i]) j++;
        if (j==m){
            printf("%d
",i-m+2),flag=1;
            return;
        }
    }
}
void GetFail(int *P){
    f[0]=f[1]=0;
    for (int i=1;i<m;i++){
        int j=f[i];
        for (;j&&P[i]!=P[j];) j=f[j];
        f[i+1]=P[i]==P[j]?j+1:0;
    }
}
int main(){
    int T;
    scanf("%d",&T);
    for (;T--;){
        scanf("%d%d",&n,&m);
        flag= 0;
        memset(f,0,sizeof(f));
        for (int i=0;i<n;i++) scanf("%d",&a[i]);
        for (int i=0;i<m;i++) scanf("%d",&b[i]);
        GetFail(b);
      //  puts("!!!!");
        Find(a,b);
     //   puts("!!!!");
        if (!flag) puts("-1");
    }
    return 0;
}

L CodeForces 622D
一开始打表找规律，然后。。。。找不到
然后开始思考人生，，，，乱搞

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <queue>
#include <cstring>
#include <cmath>
using namespace std;
const int N=100086;
int a[N],n;
int main(){
    for (;~scanf("%d",&n);){
        memset(a,0,sizeof(a));
        if (n%2==0){
            for (int i=1;i<=n;i+=2) printf("%d ",i);
            for (int i=n-1;i>=1;i-=2) printf("%d ",i);
            for (int i=2;i<=n;i+=2) printf("%d ",i);
            for (int i=n-2;i>=2;i-=2) printf("%d ",i);
            printf("%d
",n);
        }else{
            for (int i=1;i<=n;i+=2) printf("%d ",i);
            for (int i=n-2;i>=1;i-=2) printf("%d ",i);
            for (int i=2;i<=n;i+=2) printf("%d ",i);
            for (int i=n-1;i>=2;i-=2) printf("%d ",i);
            printf("%d
",n);
        }
    }
    return 0;
}

M HDU 5147
煞笔树状数组

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <queue>
#include <cstring>
#include <cmath>
using namespace std;
typedef long long ll;
const int N=100086;
int C[N*4];
int a[N],n;
ll f[N],g[N];
void Add(int x,int d){
    for (;x<=n;x+=x&-x) C[x]+=d;
}
int Query(int x){
    int re=0;
    for (;x;x-=x&-x) re+=C[x];
    return re;
}
int scan(){
    char ch=getchar();
    int x=0;
    for (;ch<'0'||ch>'9';ch=getchar());
    for (;ch<='9'&&ch>='0';ch=getchar()) x+=(x<<3)+x+ch-48;
    return x;
}
int main(){
    int T=scan();
    for (;T--;){
        n=scan();
        memset(C,0,sizeof(C));
        memset(f,0,sizeof(f));
        memset(g,0,sizeof(g));
        for (int i=1;i<=n;i++){
            a[i]=scan();
            f[i]=Query(a[i]-1);
            Add(a[i],1);
        }
        memset(C,0,sizeof(C));
        for (int i=n;i;i--){
            g[i]=g[i+1]+Query(n)-Query(a[i]);
            Add(a[i],1);
        }
        ll ans=0;
        //for (int i=1;i<=n;i++) printf("f[%d]=%I64d  g[%d]=%I64d
",i,f[i],i,g[i]);
        for (int i=1;i<n;i++) ans+=f[i]*g[i+1];
        cout<<ans<<endl;
    }
    return 0;
}

主要输出在一个痴迷艹舰的孩子身上
下次前期我上（虽然可能会增加罚时）


一开始被A坑的有点惨，艹tm的，cdmSB
最后几分钟进入乱交模式= =。。。