제출 #438192

#제출 시각아이디문제언어결과실행 시간메모리
438192dacin21DNA 돌연변이 (IOI21_dna)C++17
100 / 100
65 ms6312 KiB
#include "dna.h" #include <bits/stdc++.h> using namespace std; int n; vector<array<int, 9> > pre; template<typename T, size_t s> array<T, s> operator-(array<T, s> a, array<T, s> const&b){ for(size_t i = 0; i < s; ++i){ a[i] -= b[i]; } return a; } int deco(char const c){ switch(c){ case 'A': return 0; case 'T': return 1; case 'C': return 2; default: assert(0); return -1; } } void init(string a, string b) { n = a.size(); pre.assign(n+1, array<int, 9>{}); for(int i=0; i<n; ++i){ pre[i+1] = pre[i]; ++pre[i+1][deco(a[i])*3+deco(b[i])]; } } int get_distance(int x, int y) { auto tmp = pre[y+1] - pre[x]; int ret = 0; for(int i:{0,1,2}){ const int j = (i+1)%3; const int x = min(tmp[3*i+j], tmp[3*j+i]); ret += x; tmp[3*i+j] -= x; tmp[3*j+i] -= x; } if(tmp[3*0+1] != tmp[3*1+2] || tmp[3*0+1] != tmp[3*2+0]){ return -1; } if(tmp[3*1+0] != tmp[3*2+1] || tmp[3*1+0] != tmp[3*0+2]){ return -1; } ret += 2*tmp[3*0+1]; ret += 2*tmp[3*0+2]; return ret; }
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