Submission #1015916

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015916		deera	Mutating DNA (IOI21_dna)	C++17	43 / 100	1565 ms	3932 KiB

dna

#include <bits/stdc++.h>
using namespace std;

#include "dna.h"

string A, B;

void init(string a, string b) {
    A = a;
    B = b;
}

string sorted(string x) {
    sort(x.begin(), x.end());
    return x;
}

int get_distance(int x, int y) {
    string a = A.substr(x, (y-x+1));
    string b = B.substr(x, (y-x+1));

    if (a == b) {
        return 0;
    }

    if (sorted(a) != sorted(b)) {
        return -1;
    }

    string fa = "", fb = "";

    for(int i=0;i<a.size();i++) {
        if (a[i] != b[i]) {
            fa += a.substr(i, 1);
            fb += b.substr(i, 1);
        }
    }

    a = fa;
    b = fb;

    int n = a.size();

    if (a == b) {
        return 0;
    }

    if (n == 1) {
        return -1;
    }

    if (n == 2 || n == 3) {
        return n - 1;
    }

    return (n / 2) + (n % 2);
}

Compilation message (stderr)

dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:32:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(int i=0;i<a.size();i++) {
      |                 ~^~~~~~~~~

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