Submission #509869

#	Time	Username	Problem	Language	Result	Execution time	Memory
509869		YaserFaisal	Mutating DNA (IOI21_dna)	C++17	35 / 100	40 ms	7712 KiB

dna

#include <bits/stdc++.h> 
#include "dna.h"
using namespace std ;
 
int ps[100009][10] ;

void init ( string a , string b )
{
    int n = a.size() ;
    for ( int i = 0 ; i < n ; i++ )
    {
        if ( a[i] == 'A' && b[i] == 'C' ) ps[i+1][1]++ ;
        if ( a[i] == 'C' && b[i] == 'A' ) ps[i+1][2]++ ;
        if ( a[i] == 'C' && b[i] == 'T' ) ps[i+1][3]++ ;
        if ( a[i] == 'T' && b[i] == 'C' ) ps[i+1][4]++ ;
        if ( a[i] == 'T' && b[i] == 'A' ) ps[i+1][5]++ ;
        if ( a[i] == 'A' && b[i] == 'T' ) ps[i+1][6]++ ;
        for ( int j = 1 ; j <= 6 ; j++ ) ps[i+1][j]+=ps[i][j] ;  
    }
}
// ACT
// 1 AC 
// 2 CA 
// 3 CT 
// 4 TC 
// 5 TA
// 6 AT 
int get_distance ( int x , int y )
{
    y++ ;
	int ans = 0 ;
    int a = ps[y][1] - ps[x][1] ;
    int b = ps[y][2] - ps[x][2] ;
    int c = ps[y][3] - ps[x][3] ;
    int d = ps[y][4] - ps[x][4] ;
    int e = ps[y][5] - ps[x][5] ;
    int f = ps[y][6] - ps[x][6] ;
    //cout << a << " " << b << " " << c << " " << d << " " << e << " " << f << endl ;
    int fi = max(a,b) - min(a,b) ;
    ans+=min(a,b) ;
    int s = max(c,d) - min(c,d) ;
    ans+=min(c,d) ;
    int t = max(e,f) - min(e,f) ;
    ans+=min(e,f) ;
    if ( fi == s && fi == t && t == s ) ans+=2*fi ;
    else ans = -1 ;
    return ans ; 
}

• Subtask 1: 0 / 21
• Subtask 2: 22 / 22
• Subtask 3: 13 / 13
• Subtask 4: 0 / 28
• Subtask 5: 0 / 16