Submission #599631

#	Time	Username	Problem	Language	Result	Execution time	Memory
599631		Fidan	Mutating DNA (IOI21_dna)	C++17	100 / 100	40 ms	7284 KiB

dna

#include <bits/stdc++.h>
#include "dna.h"
using namespace std;
typedef long long ll;
const ll N=(1e5)+10;
ll n;
vector<ll> AT(N, 0);
vector<ll> TA(N, 0);
vector<ll> CA(N, 0);
vector<ll> AC(N, 0);
vector<ll> TC(N, 0);
vector<ll> CT(N, 0);
void init(string a, string b) {
	n=a.length();
	a="."+a;
	b="."+b;
	for(ll i=1; i<=n; i++){
		AT[i]=AT[i-1];
		TA[i]=TA[i-1];
		AC[i]=AC[i-1];
		CA[i]=CA[i-1];
		CT[i]=CT[i-1];
		TC[i]=TC[i-1];
		if(a[i]=='T' && b[i]=='A') TA[i]++;
		else if(a[i]=='A' && b[i]=='T') AT[i]++;
		else if(a[i]=='A' && b[i]=='C') AC[i]++;
		else if(a[i]=='C' && b[i]=='A') CA[i]++;
		else if(a[i]=='C' && b[i]=='T') CT[i]++;
		else if(a[i]=='T' && b[i]=='C') TC[i]++;
	}
}
int get_distance(int x, int y) {
	x++, y++;
	ll ac=AC[y]-AC[x-1];
	ll ca=CA[y]-CA[x-1];
	ll at=AT[y]-AT[x-1];
	ll ta=TA[y]-TA[x-1];
	ll tc=TC[y]-TC[x-1];
	ll ct=CT[y]-CT[x-1];
	ll k=0;
	if(ca+ta!=ac+at) return -1;
	if(ct+at!=tc+ta) return -1;
	if(ac+tc!=ca+ct) return -1;
	if(ca<ac){
		swap(ca, ac);
		swap(at, ta);
		swap(tc, ct);
	}
	k+=ac+ta+ct;
	k+=2*(ca-ac);
	return k;
}

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