Submission #612409

#	Time	Username	Problem	Language	Result	Execution time	Memory
612409		PanTkd	Mutating DNA (IOI21_dna)	C++17	100 / 100	43 ms	7348 KiB

dna

//
//  main.cpp
//
//  Created by Panagiotis Chadjicostas on
//  Copyright © Panagiotis Hadjicostas. All rights reserved.
//

#include <iostream>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <fstream>
#include <iomanip>
#include <iterator>
#include <limits>
#include <list>
#include <cstring>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>
#include <unordered_map>

using namespace std;

typedef int ll;
typedef vector<ll> vi;
typedef pair<ll,ll> ii;
#define fo(i,a,b) for(int i = a; i<=b; i++)
#define f(i,b) for(int i=0;i<b;i++)
#define F first
#define S second
#define sz size
#define ls s,m,idx<<1
#define rs m+1,e,idx<<1|1
const ll MOD=ll(1e9)+7;
const ll MAXN=2*ll(1e6);
void checker(){
    ll n=rand()%20+2;
    vi a(n,ll());
    for(ll i=0;i<n;i++){
        a[i]=rand()%20+2;
    }
    for(ll b=0;b<(1<<n);b++){
        vi on,off;
        for(ll i=0;i<n;i++){
            if(i&(1<<i)){
                on.push_back(i);
            }
            else{
                off.push_back(i);
            }
        }
    }
}
///////////////////////////////////////////////////////////////////////
int pre[200005][3][3], mp[ll('Z')+1];
 
void init(string a, string b){
    mp['A'] = 0, mp['C'] = 1, mp['T'] = 2;
    for (ll i = 1; i <= a.size(); i++)
        for (ll j = 0; j < 3; j++)
            for (ll k = 0; k < 3; k++)
                pre[i][j][k] = pre[i-1][j][k]+(mp[a[i-1]] == j and mp[b[i-1]] == k);
}

int get_distance(int x, int y){
    x++,y++;
    ll temp=0;
    ll ans=0;
    for(ll i=0;i<3;i++){
        ll j=(i+1)%3;

        ll c1=pre[y][i][j]-pre[x-1][i][j];
        ll c2=pre[y][j][i]-pre[x-1][j][i];
        if(!i)
            temp=c1-c2;
        if(temp!=c1-c2)
            return -1;
        ans+=min(c1,c2);
    }
    ans+=2*abs(temp);
    return ans;
}   

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:64:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |     for (ll i = 1; i <= a.size(); i++)
      |                    ~~^~~~~~~~~~~
dna.cpp:67:57: warning: array subscript has type 'char' [-Wchar-subscripts]
   67 |                 pre[i][j][k] = pre[i-1][j][k]+(mp[a[i-1]] == j and mp[b[i-1]] == k);
      |                                                         ^
dna.cpp:67:77: warning: array subscript has type 'char' [-Wchar-subscripts]
   67 |                 pre[i][j][k] = pre[i-1][j][k]+(mp[a[i-1]] == j and mp[b[i-1]] == k);
      |                                                                             ^

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