Submission #1015680

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015680		jairRS	Mutating DNA (IOI21_dna)	C++17	21 / 100	20 ms	3932 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
#define all(s) s.begin(), s.end()
using namespace std;

string a, b;
int n;

void init(string _a, string _b)
{
    a = _a;
    b = _b;
    n = a.size();
}

int get_distance(int x, int y)
{
    string sub_a = string(a.begin() + x, a.begin() + y + 1);
    string sub_b = string(b.begin() + x, b.begin() + y + 1);

    if (sub_a == sub_b)
        return 0;

    // sub_a != sub_b

    if (sub_a.size() == 1)
        return -1;

    if (sub_a.size() == 2)
    {
        sort(all(sub_a));
        sort(all(sub_b));

        if (sub_a != sub_b)
            return -1;
        else
            return 1;
    }

    // sub.size() == 3

    string oa = sub_a;
    string ob = sub_b;

    sort(all(sub_a));
    sort(all(sub_b));

    if (sub_a != sub_b)
        return -1;

    // counts tan bien

    int eq = 0;
    for (int i = 0; i < 3; i++)
    {
        eq += oa[i] == ob[i];
    }

    switch (eq)
    {
    case 0:
        return 2;

    case 1:
        return 1;

    default:
        return -2; // explode
    }
}

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