Submission #1001620

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001620		vjudge1	Mutating DNA (IOI21_dna)	C++17	100 / 100	37 ms	6392 KiB

dna

#include <bits/stdc++.h>
#include "dna.h"
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization("unroll-loops")
/// author: LilPluton auuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
#define OPT         ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb          push_back
#define arr         array
#define vll         vector<int>
#define segment_tree int l=n*2,r=l+1,mid=(b+e)/2
#define fi          first
#define se          second
#define rep(i,j,k)  for(int i = j; i <= k; ++i)
#define all(a)      a.begin(),a.end()
#define pii         pair<int,int>
#define endll       '\n'
using namespace std;
const int N = 2e5 + 5;
int n, pref[N];
vector<int>ac,at,ca,ct,ta,tc;
void init(string a,string b)
{
    a = '#' + a;
    b = '#' + b;
    n = a.size();
    ac.assign(n + 1,0);
    at.assign(n + 1,0);
    ca.assign(n + 1,0);
    ct.assign(n + 1,0);
    ta.assign(n + 1,0);
    tc.assign(n + 1,0);

    for(int i = 1; i <= n; ++i)
    {
        ac[i] = ac[i - 1];
        at[i] = at[i - 1];
        ca[i] = ca[i - 1];
        ct[i] = ct[i - 1];
        ta[i] = ta[i - 1];
        tc[i] = tc[i - 1];
        if(a[i] == 'A')
        {
            if(b[i] == 'C')     ac[i]++;
            if(b[i] == 'T')     at[i]++;
        }
        if(a[i] == 'C')
        {
            if(b[i] == 'A')     ca[i]++;
            if(b[i] == 'T')     ct[i]++;
        }
        if(a[i] == 'T')
        {
            if(b[i] == 'A')     ta[i]++;
            if(b[i] == 'C')     tc[i]++;
        }
    }
}

int get_distance(int x, int y) 
{
    int ans = 0;
    int acc = ac[y + 1] - ac[x];
    int att = at[y + 1] - at[x];
    int caa = ca[y + 1] - ca[x];
    int ctt = ct[y + 1] - ct[x];
    int taa = ta[y + 1] - ta[x];
    int tcc = tc[y + 1] - tc[x];
    if(acc + att != taa + caa)    {return -1;}
    if(caa + ctt != acc + tcc)    {return -1;}
    if(taa + tcc != att + ctt)    {return -1;}
    int mn1 = min(acc,caa), mn2 = min(att,taa), mn3 = min(tcc,ctt);
    ans += mn1 + mn2 + mn3;
    acc -= mn1;
    caa -= mn1;
    att -= mn2;
    taa -= mn2;
    tcc -= mn3;
    ctt -= mn3;
    int sum = max({att, taa, ctt, tcc, acc, caa});
    ans += sum * 2;
    return ans;
}

Compilation message (stderr)

dna.cpp:5: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    5 | #pragma GCC optimization("unroll-loops")
      |

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