제출 #437077

#제출 시각아이디문제언어결과실행 시간메모리
437077T0p_DNA 돌연변이 (IOI21_dna)C++17
56 / 100
52 ms5256 KiB
#include "dna.h" #include <bits/stdc++.h> using namespace std; int n; int cnt[2][3][100100], ans[100100]; map<char, int> mp; void init(string a, string b) { n = a.length(); mp['A'] = 0; mp['C'] = 1; mp['T'] = 2; cnt[0][mp[a[0]]][1]++; cnt[1][mp[b[0]]][1]++; ans[1] = (a[0] == b[0]) ? 0 : 1; for(int i=2 ; i<=n ; i++) { cnt[0][mp[a[i-1]]][i]++; cnt[1][mp[b[i-1]]][i]++; for(int j=0 ; j<3 ; j++) { cnt[0][j][i] += cnt[0][j][i-1]; cnt[1][j][i] += cnt[1][j][i-1]; } ans[i] = ans[i-1] + ((a[i-1] == b[i-1]) ? 0 : 1); } } int get_distance(int x, int y) { x++, y++; for(int j=0 ; j<3 ; j++) if(cnt[0][j][y]-cnt[0][j][x-1] != cnt[1][j][y]-cnt[1][j][x-1]) return -1; int ret = 0, dif = ans[y] - ans[x-1]; if(dif%2) { ret = 2; dif -= 3; } ret += dif/2; return ret; }
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