Submission #70821

#	Time	Username	Problem	Language	Result	Execution time	Memory
70821		MANcity	Crayfish scrivener (IOI12_scrivener)	C++14	34 / 100	1096 ms	119460 KiB

scrivener

#include<iostream>
#include<cstdio>
#include<fstream>
#include<algorithm>
#include<cmath>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<string>
#include<cstring>
#include<vector>
using namespace std;
#define for1(i,n) for(int i=1;i<=(int)n;i++)
#define for0(i,n) for(int i=0;i<=(int)n;i++)
#define forn(i,n) for(int i=n;i>=1;i--)
#define fo(i,x,y) for(int i=x;i<=(int)y;i++)
#define fr(i,x,y) for(int i=x;i>=(int)y;i--)
#define pb push_back
#define mp make_pair
#define LL long long
const LL Mod=1000*1000*1000+7;
char last;
int OP_NOW;
int letter_par[1000002];
int up[1000002][30];
int height[1000002];
int maxhi=0;
void Init() {}

void TypeLetter(char L) {
    OP_NOW++;
    letter_par[OP_NOW]=(L-'a');
    height[OP_NOW]=height[OP_NOW-1]+1;
    maxhi=max(maxhi,height[OP_NOW]);
    up[OP_NOW][0]=(OP_NOW-1);
    int G=log2(4*maxhi);
    for1(i,G)
        up[OP_NOW][i]=up[up[OP_NOW][i-1]][i-1];
}

void UndoCommands(int U) {
    OP_NOW++;
    height[OP_NOW]=height[OP_NOW-U-1];
    letter_par[OP_NOW]=letter_par[OP_NOW-U-1];
    int G=log2(4*maxhi);
    for0(i,G)
        up[OP_NOW][i]=up[OP_NOW-U-1][i];
}

char GetLetter(int P) {
    int N=height[OP_NOW];
    if((P+1)==height[OP_NOW])
    {
        return (letter_par[OP_NOW]+'a');
    }
    int pos=OP_NOW;
    //cout<<pos<<" "<<up[pos][0]<<" "<<up[pos][1]<<" "<<up[pos][2]<<" "<<up[pos][3]<<endl;
    int G=log2(4*maxhi);
    fr(i,G,0)
    {
        //cout<<up[pos][i]<<" "<<height[up[pos][i]]<<endl;
        if(height[up[pos][i]]>=(P+1))
        {
            //cout<<i<<"dddd"<<endl;
            pos=up[pos][i];
        }
    }
    return (letter_par[pos]+'a');
}
/*
1000
T a
T b
T d
P 1

*/

Compilation message (stderr)

scrivener.cpp: In function 'char GetLetter(int)':
scrivener.cpp:52:9: warning: unused variable 'N' [-Wunused-variable]
     int N=height[OP_NOW];
         ^

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