Submission #78554

#	Time	Username	Problem	Language	Result	Execution time	Memory
78554		Charis02	Crayfish scrivener (IOI12_scrivener)	C++14	34 / 100	1099 ms	233272 KiB

scrivener

#include<stdio.h>
#include<algorithm>
#define ll int
#define rep(i,a,b) for(int i = a;i < b;i++)
#define N 1000004
#define gc getchar//_unlocked

using namespace std;

struct node{
    ll tag;
    ll length;
    bool isupdate;
    char ans;
};

struct node* root;
ll countt = 0;
struct node* dp[N][21];
struct node* ldp[N][21];

struct node* newNode()
{
    struct node* neo = (struct node*)malloc(sizeof (struct node));

    neo -> isupdate = false;
    neo -> length = 0;
    neo -> tag = countt++;

    return neo;
}

void Init()
{
    root = newNode();
}

ll read()
{
    char c = gc();

    while(c < '0' || c > '9')
    {
        c = gc();
    }

    ll num = c - '0';
    c = gc();

    while(c >= '0' && c <= '9')
    {
        num *= 10;
        num += (c -'0');
        c = gc();
    }

    return num;
}

bool ison(ll x,ll i)
{
    return (bool)(x&(1 << i));
}


struct node* jump(struct node* cur,ll x)
{
    if(dp[cur -> tag][x])
        return dp[cur -> tag][x];

    return dp[cur -> tag][x] = jump(jump(cur,x-1),x-1);
}

struct node* ancestor(struct node* cur,ll x)
{
    if(x == 0)
        return cur;

    struct node* res = cur;

    rep(i,0,19)
    {
        if(ison(x,i))
        {
            res = jump(res,i);
        }
    }

    return res;
}


struct node* letterjump(struct node* cur,ll x)
{
    if(ldp[cur -> tag][x])
        return ldp[cur -> tag][x];

    return ldp[cur -> tag][x] = letterjump(letterjump(cur,x-1),x-1);
}

struct node* letterancestor(struct node* cur,ll x)
{
    if(x == 0)
        return cur;

    struct node* res = cur;

    rep(i,0,19)
    {
        if(ison(x,i))
        {
            res = letterjump(res,i);
        }
    }

    return res;
}

void TypeLetter(char c)
{
    struct node* p = root;
    root = newNode();
    dp[root -> tag][0] = p;

    if(p -> isupdate)
    {
        ldp[root -> tag][0] = ldp[p -> tag][0];
    }
    else
    {
        ldp[root -> tag][0] = p;
    }

    root -> length = (p -> length) + 1;
    root -> ans = c;

    return;
}

void UndoCommands(ll x)
{
    struct node* p = root;
    struct node* rp = ancestor(p,x);

    root = newNode();
    dp[root -> tag][0] = p;

    if(rp -> isupdate)
    {
        ldp[root -> tag][0] = ldp[rp -> tag][0];
    }
    else
    {
        ldp[root -> tag][0] = rp;
    }

    root -> isupdate = true;
    root -> length = rp -> length;
    root -> ans = '0';

    return;
}

char GetLetter(int P)
{
    return (letterancestor(root,(root -> length) - P - (ll)(!(root -> isupdate))) -> ans);
}

/*
int main()
{
    n = read();

    rep(i,0,n)
    {
        type = gc();

        while(type < 'A' || type > 'Z')
            type = gc();

        if(type == 'T')
        {
            c = gc();

            while(c < 'a' || c > 'z')
                c = gc();

            typechar(c,root);
        }
        else if(type == 'U')
        {
            d = read();
            undo(d,root);
        }
        else
        {
            d = read();

            printf("%c\n",(letterancestor(root,(root -> length) - d - (ll)(!(root -> isupdate))) -> ans));
        }
    }

    return 0;
}*/

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 22 / 22
• Subtask 4: 0 / 26
• Subtask 5: 0 / 40