Submission #829829

#	Time	Username	Problem	Language	Result	Execution time	Memory
829829		Sohsoh84	Mutating DNA (IOI21_dna)	C++17	35 / 100	30 ms	4652 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e6 + 10;

int n, ps[MAXN], c1[MAXN];

void init(string a, string b) {
	n = a.size();
	a = '#' + a;
	b = '#' + b;
	
	for (int i = 1; i <= n; i++) {
		ps[i] = ps[i - 1] + (a[i] != b[i]);
		c1[i] = c1[i - 1] + (a[i] == 'A') - (b[i] == 'A');
	}
}

int get_distance(int x, int y) {
	x++;
	y++;

	if (c1[y] - c1[x - 1]) return -1;
	return (ps[y] - ps[x - 1]) / 2;
}

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