Submission #442529

#	Time	Username	Problem	Language	Result	Execution time	Memory
442529		mariowong	Mutating DNA (IOI21_dna)	C++17	56 / 100	54 ms	13568 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
using namespace std;
int n,ct[100005][5],ct2[100005][5],pp[100005][15],num,num2;
string t[15]={"AC","CA","AT","TA","TC","CT","AA","CC","TT"};
char s[8]={'A','C','T'};
void init(std::string a, std::string b) {
    n=a.length();
    for (int i=0;i<n;i++){
        for (int j=0;j<3;j++){
            if (i != 0){
                ct[i][j]=ct[i-1][j];
                ct2[i][j]=ct2[i-1][j];
            }
            if (a[i] == s[j])
            ct[i][j]++;
            if (b[i] == s[j])
            ct2[i][j]++;
        }
        for (int j=0;j<9;j++){
            if (i != 0)
               pp[i][j]=pp[i-1][j];
            
            if (a[i] == t[j][0] && b[i] == t[j][1])
            pp[i][j]++;
        }
    }
}

int get_distance(int x, int y) {
    for (int i=0;i<3;i++){
        if (x == 0){
            if (ct[y][i] != ct2[y][i])
            return -1;
        }
        else
        if (ct[y][i]-ct[x-1][i] != ct2[y][i]-ct2[x-1][i])
        return -1;
    }
    if (x == 0){
        num=min(pp[y][0],pp[y][1])+min(pp[y][2],pp[y][3])+min(pp[y][4],pp[y][5]);
        num2=pp[y][6]+pp[y][7]+pp[y][8];
        return num+max(1,y-x+1-num*2-num2)-1;
    }
    else
    {
        num=min(pp[y][0]-pp[x-1][0],pp[y][1]-pp[x-1][1])+min(pp[y][2]-pp[x-1][2],pp[y][3]-pp[x-1][3])+min(pp[y][4]-pp[x-1][4],pp[y][5]-pp[x-1][5]);
        num2=pp[y][6]-pp[x-1][6]+pp[y][7]-pp[x-1][7]+pp[y][8]-pp[x-1][8];
        return num+max(1,y-x+1-num*2-num2)-1;
    }
}
/*
string r,g;
int aa,bb;
int main(){
    cin >> r >> g;
    init(r,g);
    for (int i=1;i<=4;i++){
        cin >> aa >> bb;
        cout << get_distance(aa,bb) << "\n";
    }
}*/

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