2018.10.15noip模拟赛

题目和题解看这里

#include<bits/stdc++.h>
#define ll long long
using namespace std;
inline int read()
{
    int x=0,f=1;char c=getchar();
    for(;!isdigit(c);c=getchar()) if(c=='-') f=-1;
    for(;isdigit(c);c=getchar()) x=x*10+c-'0';
    return f*x;
}
inline ll Lead()
{
    ll x=0,f=1;char c=getchar();
    for(;!isdigit(c);c=getchar()) if(c=='-') f=-1;
    for(;isdigit(c);c=getchar()) x=x*10+c-'0';
    return f*x;
}
int T,l,f;
char S[20];
int A[20];
int Hsh[20][1000010];
void dfs(int x,ll val,ll now)
{
    if(x==l||val>=1000000) return;
    Hsh[x][val]=1;
    dfs(x+1,val+A[x+1],A[x+1]);
    dfs(x+1,val+A[x+1]+now*9,now*10+A[x+1]);
}
ll calc(ll x)
{
    if(x==0) return 10;
    ll t=1;
    while(x>0)x/=10,t*=10;
    return t;
}
void dfs2(int x,ll val,ll now)
{
    if(x==1||val>=1000000) return;
    if(Hsh[x-1][val]==1) f=1;
    dfs2(x-1,val+A[x-1],A[x-1]);
    dfs2(x-1,val+A[x-1]*calc(now),now+A[x-1]*calc(now));
}
int main()
{
    freopen("equation.in","r",stdin);
    freopen("equation.out","w",stdout);
    T=read();
    while(T--)
    {
        memset(Hsh,0,sizeof(Hsh));
        f=0;
        scanf("%s",S+1);
        l=strlen(S+1);
        for(int i=1;i<=l;i++) A[i]=S[i]-'0';
        dfs(1,A[1],A[1]);    
        dfs2(l,A[l],A[l]);
        if(f) {printf("Yes
");continue;}
        printf("No
");
    }
}

#include<bits/stdc++.h>
#define ll long long
#define int long long
using namespace std;
inline int read()
{
    int x=0,f=1;char c=getchar();
    for(;!isdigit(c);c=getchar()) if(c=='-') f=-1;
    for(;isdigit(c);c=getchar()) x=x*10+c-'0';
    return f*x;
}
inline ll Lead()
{
    ll x=0,f=1;char c=getchar();
    for(;!isdigit(c);c=getchar()) if(c=='-') f=-1;
    for(;isdigit(c);c=getchar()) x=x*10+c-'0';
    return f*x;
}
int n,m,q,P[160010];
int fst[160010],nxt[320010],to[320010],cnt;
int dfn[160010],dcnt,siz[160010],dep[160010];
int st[160010][20],op[160010];
void link(int x,int y)
{
    nxt[++cnt]=fst[x];
    fst[x]=cnt;to[cnt]=y;
}
void dfs(int x)
{
    dfn[x]=++dcnt;
    siz[x]=1;
    for(int i=fst[x];i;i=nxt[i])
    {
        if(dep[to[i]]!=0) continue;
        dep[to[i]]=dep[x]+1;
        st[to[i]][0]=x;
        dfs(to[i]);
        siz[x]+=siz[to[i]];
    }
}
void makest()
{
    for(int i=1;i<=18;i++)
    {
        for(int j=1;j<=n;j++)
        {
            st[j][i]=st[st[j][i-1]][i-1];
        }
    }
}
int calc(int x,int stp)
{
    if(dep[x]<=stp) return 1;
    for(int i=0;(1<<i)<=stp;i++)
    {
        if(stp&(1<<i)) x=st[x][i];
    }
    return x;
}
namespace Seg_Tree
{
    #define lx (x<<1)
    #define rx ((x<<1)|1)
    int tag1[3020010],tag2[3020010];
    void psd(int x)
    {
        if(tag1[x])
        {
            tag1[lx]=tag1[x];
            tag1[rx]=tag1[x];
            tag2[lx]=tag2[rx]=0;
            tag1[x]=0;
        }
        if(tag2[x])
        {
            tag2[lx]+=tag2[x];
            tag2[rx]+=tag2[x];
            tag2[x]=0;
        }
    }
    void mdf1(int x,int l,int r,int nl,int nr,int val)
    {
        if(r<l) return;
        if(nl<=l&&r<=nr) 
        {
            tag1[x]=val;tag2[x]=0;return;
        }
        psd(x);
        int mid=(l+r)>>1;
        if(nl<=mid) mdf1(lx,l,mid,nl,nr,val);
        if(nr>mid) mdf1(rx,mid+1,r,nl,nr,val);
    }
    void mdf2(int x,int l,int r,int nl,int nr,int val)
    {
        if(r<l) return;
        if(nl<=l&&r<=nr) 
        {
            tag2[x]+=val;return;
        }
        psd(x);
        int mid=(l+r)>>1;
        if(nl<=mid) mdf2(lx,l,mid,nl,nr,val);
        if(nr>mid) mdf2(rx,mid+1,r,nl,nr,val);
    }
    int qury(int x,int l,int r,int p)
    {
        if(l==r) return calc(tag1[x]==0?P[l]:tag1[x],tag2[x]);
        psd(x);
        int mid=(l+r)>>1;
        if(p<=mid) return qury(lx,l,mid,p);
        if(p>mid) return qury(rx,mid+1,r,p);
    }
}
using namespace Seg_Tree;
namespace Fenwick_Tree
{
    #define lowbit(x) (x&-x)
    ll c1[160010],c2[160010];
    void add1(int p,ll val){for(int i=p;i<=n;i+=lowbit(i)) c1[i]+=val;}
    void add2(int p,ll val){for(int i=p;i<=n;i+=lowbit(i)) c2[i]+=val;}
    ll qury1(int p){ll tmp=0;for(int i=p;i>0;i-=lowbit(i)) tmp+=c1[i];return tmp;}
    ll qury2(int p){ll tmp=0;for(int i=p;i>0;i-=lowbit(i)) tmp+=c2[i];return tmp;}
}
using namespace Fenwick_Tree;
signed main()
{
    freopen("robot3.in","r",stdin);
    freopen("robot.out","w",stdout);
    n=read();m=read();
    for(int i=1;i<n;i++)
    {
        int x=read(),y=read();
        link(x,y);link(y,x);
    }
    dep[1]=1;
    dfs(1);makest();
    for(int i=1;i<=m;i++) P[i]=read();
    q=read();
    for(int i=1;i<=q;i++)
    {
        int opt=read();
        if(opt==3) 
        {
            int x=read();
            int now=qury(1,1,m,x);
            op[now]=!op[now];
            if(op[now]==1)add1(dfn[now],dep[now]),add2(dfn[now],1ll);
            else add1(dfn[now],-dep[now]),add2(dfn[now],-1ll);
            ll sum=qury1(dfn[now]+siz[now]-1)-qury1(dfn[now]);
            ll num=qury2(dfn[now]+siz[now]-1)-qury2(dfn[now]);
            printf("%lld
",sum-num*dep[now]);
            continue;
        }
        int l=read(),r=read(),val=read();
        if(opt==1) mdf1(1,1,m,l,r,val);
        if(opt==2) mdf2(1,1,m,l,r,val);
    }
}