제출 #898403

#제출 시각아이디문제언어결과실행 시간메모리
898403aqxaDNA 돌연변이 (IOI21_dna)C++17
100 / 100
55 ms9760 KiB
#include <bits/stdc++.h> using namespace std; using ll = long long; const int N = 1e5 + 10; int pa[N][3], pb[N][3], n, p[N][3][3], c[3][3]; void init(string a, string b) { n = a.size(); for (int i = 0; i < n; ++i) { int ca = (a[i] == 'A' ? 0 : (a[i] == 'T' ? 1 : 2)); int cb = (b[i] == 'A' ? 0 : (b[i] == 'T' ? 1 : 2)); pa[i + 1][ca]++; pb[i + 1][cb]++; p[i + 1][ca][cb]++; for (int j = 0; j < 3; ++j) { pa[i + 1][j] += pa[i][j]; pb[i + 1][j] += pb[i][j]; for (int k = 0; k < 3; ++k) { p[i + 1][j][k] += p[i][j][k]; } } } } int get_distance(int x, int y) { for (int i = 0; i < 3; ++i) { if (pa[y + 1][i] - pa[x][i] != pb[y + 1][i] - pb[x][i]) { return -1; } } for (int i = 0; i < 3; ++i) { for (int j = 0; j < 3; ++j) { c[i][j] = p[y + 1][i][j] - p[x][i][j]; } } int ans = 0; for (int i = 0; i < 3; ++i) { for (int j = i + 1; j < 3; ++j) { int z = min(c[i][j], c[j][i]); c[i][j] -= z; c[j][i] -= z; ans += z; } } vector<int> d0, d1; for (int i = 0; i < 3; ++i) { d0.push_back(c[i][(i + 1) % 3]); d1.push_back(c[i][(i + 2) % 3]); } sort(d0.begin(), d0.end()); sort(d1.begin(), d1.end()); assert(d0[0] == d0[2] && d1[0] == d1[2]); assert(d0[0] == 0 || d1[0] == 0); return 2 * (d0[0] + d1[0]) + ans; } // int32_t main() { // ios::sync_with_stdio(false); // cin.tie(nullptr); // int m, q; // cin >> m >> q; // string a, b; // for (int i = 0; i < m; ++i) { // int c = rand() % 3; // if (c == 0) a += 'A'; // if (c == 1) a += 'T'; // if (c == 2) a += 'C'; // } // b = a; // random_shuffle(b.begin(), b.end()); // init(a, b); // cout << a << "\n"; // cout << b << "\n"; // for (int i = 0; i < m; ++i) { // for (int j = i; j < m; ++j) { // cout << "! " << i << ' ' << j << ' ' << get_distance(i, j) << '\n'; // } // } // return 0; // }
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