제출 #479214

#제출 시각아이디문제언어결과실행 시간메모리
479214couplefireDNA 돌연변이 (IOI21_dna)C++17
100 / 100
55 ms7412 KiB
#include <bits/stdc++.h> using namespace std; const int N = 100005; int n, cnt[3][3][N]; void init(string a, string b){ n = a.size(); for(auto &c : a) if(c=='A') c = '0'; else if(c=='C') c = '1'; else c = '2'; for(auto &c : b) if(c=='A') c = '0'; else if(c=='C') c = '1'; else c = '2'; a = "$"+a, b = "$"+b; for(int i = 0; i<3; ++i) for(int j = 0; j<3; ++j) for(int id = 1; id<=n; ++id) cnt[i][j][id] = cnt[i][j][id-1]+(a[id]-'0'==i && b[id]-'0'==j); } int get_distance(int l, int r){ ++l, ++r; int ans = 0; int tmp[3][3]; memset(tmp, 0, sizeof tmp); for(int i = 0; i<3; ++i) for(int j = 0; j<3; ++j) tmp[i][j] = cnt[i][j][r]-cnt[i][j][l-1]; for(int i = 0; i<3; ++i) for(int j = i+1; j<3; ++j){ int x = min(tmp[i][j], tmp[j][i]); ans += x, tmp[i][j] -= x, tmp[j][i] -= x; } if(tmp[0][1] != tmp[1][2] || tmp[0][1] != tmp[2][0] || tmp[1][0] != tmp[2][1] || tmp[1][0] != tmp[0][2]) return -1; ans += 2*(tmp[0][1]+tmp[1][0]); return ans; }
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