Submission #768560

#	Time	Username	Problem	Language	Result	Execution time	Memory
768560		Trumling	Mutating DNA (IOI21_dna)	C++17	0 / 100	21 ms	2580 KiB

dna

#include <vector>
#include <string>
using namespace std;

vector<int> mutationCount;

void init(string a, string b) {
    int n = a.length();
    mutationCount.resize(n, 0);

    for (int i = 0; i < n; i++) {
        mutationCount[i] = (a[i] != b[i]) ? 1 : 0;
        if (i > 0) {
            mutationCount[i] += mutationCount[i - 1];
        }
    }
}

int get_distance(int x, int y) {
    int mutationInRange = mutationCount[y] - ((x > 0) ? mutationCount[x - 1] : 0);
    int substringLength = y - x + 1;
    int nonMutationCount = substringLength - mutationInRange;
    if (mutationInRange == 0 || nonMutationCount == 0) {
        return 0;
    } else if (nonMutationCount % 2 == 0) {
        return nonMutationCount / 2;
    } else {
        return -1;
    }
}

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