Submission #542388

#	Time	Username	Problem	Language	Result	Execution time	Memory
542388		rembocoder	Mutating DNA (IOI21_dna)	C++17	0 / 100	25 ms	6604 KiB

dna

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#include <bits/stdc++.h>

using namespace std;

//#define int int64_t
#define forn(i, n) for (int i = 0; i < (int)(n); i++)

struct my_hash {
    inline size_t operator()(const pair<int, int>& a) const {
        return a.first * 31 + a.second;
    }
};

string s, t;
string act = "ACT";
vector<int> cnt[3];
vector<int> x[3][3];

void init(string s_, string t_) {
    s = s_;
    t = t_;
    int n = s.size();
    for (int i = 0; i < 3; i++) {
        cnt[i].resize(n + 1);
        for (int j = 0; j < n; j++) {
            cnt[i][j + 1] = cnt[i][j] + (act[i] == s[j]);
            cnt[i][j + 1] = cnt[i][j] - (act[i] == t[j]);
        }
    }
    for (int i = 0; i < 3; i++) {
        cnt[i].resize(n + 1);
        for (int j = 0; j < 3; j++) {
            for (int k = 0; k < n; k++) {
                x[i][j][k + 1] = x[i][j][k] + (act[i] == s[k] && act[j] == t[k]);
            }
        }
    }
}

int get_distance(int l, int r) {
    r++;
    for (int i = 0; i < 3; i++) {
        if (cnt[i][r] != cnt[i][l]) {
            return -1;
        }
    }
    int ab = x[0][1][r] - x[0][1][l];
    int ba = x[1][0][r] - x[1][0][l];
    int bc = x[1][2][r] - x[1][2][l];
    int cb = x[2][1][r] - x[2][1][l];
    int ca = x[2][0][r] - x[2][0][l];
    int ac = x[0][2][r] - x[0][2][l];
    int ans = min(ab, ba) + min(bc, cb) + min(ac, ca);
    return ans;
}

/*int32_t main() {
    ios_base::sync_with_stdio(0);
    int t = 1;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        vector<int> a(n);
        for (int i = 0; i < n; i++) {
            cin >> a[i];
        }
        sort(a.begin(), a.end());
        int sum_a0 = 0;
        for (int i = 1; i < n; i++) {
            sum_a0 += a[0] + a[i];
        }
        int sum_ab = 0;
        for (int i = 0; i < n - 1; i++) {
            sum_ab += a[i] + a.back();
        }
        if (sum_a0 > 0 || sum_ab < 0) {
            cout << "INF\n";
            continue;
        }
        vector<int> sum(n + 1);
        for (int i = 0; i < n; i++) {
            sum[i + 1] = sum[i] + a[i];
        }
        int ans = -2e18;
        for (int i = 0; i < n; i++) {
            int cur = -a[i] * a[i] * (n - 1);
            cur += (sum[n] - sum[i + 1] - a[i] * (n - i - 1)) * (a[0] - a[i]);
            cur += (sum[i] - sum[1] - a[i] * (i - 1)) * (a[n - 1] - a[i]);
            ans = max(ans, cur);
        }
        cout << ans << '\n';
    }
    return 0;
}
*/

Compilation message (stderr)

dna.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
dna.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 0 / 21
• Subtask 2: 0 / 22
• Subtask 3: 0 / 13
• Subtask 4: 0 / 28
• Subtask 5: 0 / 16