Submission #838315

#	Time	Username	Problem	Language	Result	Execution time	Memory
838315		ALeonidou	Mutating DNA (IOI21_dna)	C++17	56 / 100	26 ms	4496 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>

using namespace std;

#define ll int
#define sz(x) (ll)x.size()
#define MID ((l+r)/2)
#define F first
#define S second
#define dbg(x) cout<<#x<<": "<<x<<endl;
#define pb push_back
#define ins insert
#define inf 1e9

typedef vector <ll> vi;
typedef pair <ll,ll> ii;
typedef vector <ii> vii;

void printVct(vi &v){
    for (ll i =0; i<sz(v); i++){
        cout<<v[i]<<" ";
    }
    cout<<endl;
}

vi a1,c1,a2,c2,f;

ll getRange(vi &v, ll l, ll r){
    if (l == 0) return v[r];
    return v[r] - v[l-1];
}

void init(string a, string b){
    ll n = sz(a);
    a1.resize(n),a2.resize(n),c1.resize(n),c2.resize(n),f.resize(n);
    a1[0] = (a[0]=='A');
    a2[0] = (b[0]=='A');
    c1[0] = (a[0] == 'C');
    c2[0] = (b[0] == 'C');
    f[0] = (a[0] == b[0]);
    for (ll i =1; i<n; i++){
        a1[i] = (a[i]=='A') + a1[i-1];
        a2[i] = (b[i]=='A') + a2[i-1];
        c1[i] = (a[i] == 'C') + c1[i-1];
        c2[i] = (b[i] == 'C') + c2[i-1];
        f[i] = (a[i] == b[i]) + f[i-1];
    }

    // printVct(a1);
    // printVct(a2);
    // printVct(c1);
    // printVct(c2);
    // printVct(f);
}

int get_distance(int x, int y) {
    if (getRange(a1,x,y) == getRange(a2,x,y) && getRange(c1,x,y) == getRange(c2,x,y)){
        ll range = y-x+1;
        ll dif = range - getRange(f, x,y);
        ll ans = (dif%2) + dif/2;
        return ans;
    }
	return -1;
}

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