Submission #1081093

#	Time	Username	Problem	Language	Result	Execution time	Memory
1081093		cpptowin	Genetics (BOI18_genetics)	C++17	46 / 100	420 ms	7504 KiB

genetics

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma,popcnt")
#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define bitcount(x) __builtin_popcountll(x)
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ss(x) (int)x.size()
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
void add(int &x, int k)
{
    x += k;
    x %= mod;
    if(x < 0) x += mod;
}
void del(int &x, int k)
{
    x -= k;
    x %= mod;
    if(x < 0) x += mod;
}
int n,m,k;
bitset<4100> a[16401];
int id[4111];
main()
{
#define name "TASK"
    if (fopen(name ".inp", "r"))
    {
        freopen(name ".inp", "r", stdin);
        freopen(name ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> m >> k;
    fo(i,1,n) 
    {
        fo(j,0,m - 1)
        {
            char t;
            cin >> t;
            if(t == 'A') a[(i - 1) * 4][j] = 1;
            if(t == 'T') a[(i - 1) * 4 + 1][j] = 1;
            if(t == 'G') a[(i - 1) * 4 + 2][j] = 1;
            if(t == 'C') a[(i - 1) * 4 + 3][j] = 1;
        } 
    }
    fo(i,1,n) id[i] = i;
    fo(i,1,n) 
    {
        bool ok = 1;
        random_shuffle(id + 1,id + n + 1);
        fo(x,1,min(3 * N + 500,n))  
        {
            int j = id[x];
            if(i == j) continue;
            int cnt = 0;
            fo(k,0,3) 
            {
                cnt += (a[(i - 1) * 4 + k] ^ a[(j - 1) * 4 + k]).count();
            }
            cnt /= 2;
            if(cnt != k) 
            {
                ok = 0;
                break;
            }
        }
        if(ok) return cout << i,0;
    }
}

Compilation message (stderr)

genetics.cpp:61:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   61 | main()
      | ^~~~
genetics.cpp: In function 'int main()':
genetics.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
genetics.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 27 / 27
• Subtask 2: 19 / 19
• Subtask 3: 0 / 28
• Subtask 4: 0 / 26