제출 #828474

#제출 시각아이디문제언어결과실행 시간메모리
828474TheSahibDNA 돌연변이 (IOI21_dna)C++17
100 / 100
31 ms7420 KiB
#pragma GCC optimize("O3") #include "dna.h" #include <bits/stdc++.h> using namespace std; const int MAX = 1e5 + 5; int n; int pre[MAX][3][3]; map<char, int> mp = {{'A', 0}, {'C', 1}, {'T', 2}}; void init(string a, string b) { n = a.size(); for (int i = 0; i < n; i++) { pre[i + 1][mp[a[i]]][mp[b[i]]]++; } for (int i = 1; i <= n; i++) { for (int j = 0; j < 3; j++) { for (int k = 0; k < 3; k++) { pre[i][j][k] += pre[i - 1][j][k]; } } } } int get_distance(int x, int y) { y += 1; int arr[3][3]; for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { arr[i][j] = pre[y][i][j] - pre[x][i][j]; } } for (int i = 0; i < 3; i++) { int s1 = 0, s2 = 0; s1 += arr[i][0] + arr[i][1] + arr[i][2]; s2 += arr[0][i] + arr[1][i] + arr[2][i]; if(s1 != s2){ return -1; } } int s = 0, ans = 0; for (int i = 0; i < 3; i++) { for (int j = i + 1; j < 3; j++) { if(arr[i][j] < arr[j][i]) swap(arr[i][j], arr[j][i]); ans += arr[j][i]; s += arr[i][j] - arr[j][i]; } } ans += s / 3 * 2; return ans; }
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