제출 #657896

#제출 시각아이디문제언어결과실행 시간메모리
657896benjaminkleynDNA 돌연변이 (IOI21_dna)C++17
100 / 100
37 ms7432 KiB
#include <bits/stdc++.h> #include "dna.h" using namespace std; typedef long long ll; int n; int pref[3][3][100001]; void init(string A, string B) { n = A.size(); for (int i = 0; i < n; i++) { for (int a = 0; a < 3; a++) for (int b = 0; b < 3; b++) pref[a][b][i + 1] = pref[a][b][i]; int a = (A[i] == 'C') + 2 * (A[i] == 'T'); int b = (B[i] == 'C') + 2 * (B[i] == 'T'); pref[a][b][i + 1]++; } } int cnt[3][3]; int get_distance(int x, int y) { for (int a = 0; a < 3; a++) for (int b = 0; b < 3; b++) cnt[a][b] = pref[a][b][y + 1] - pref[a][b][x]; for (int i = 0; i < 3; i++) if (cnt[i][0] + cnt[i][1] + cnt[i][2] != cnt[0][i] + cnt[1][i] + cnt[2][i]) return -1; int res = min(cnt[0][1], cnt[1][0]) + min(cnt[1][2], cnt[2][1]) + min(cnt[2][0], cnt[0][2]); return res + (max(cnt[0][1], cnt[1][0]) - min(cnt[0][1], cnt[1][0])) * 2; }
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