Submission #585317

#	Time	Username	Problem	Language	Result	Execution time	Memory
585317		cfalas	Mutating DNA (IOI21_dna)	C++17	56 / 100	38 ms	6644 KiB

dna

#include "dna.h"
#include<bits/stdc++.h>
using namespace std;

int Aa[200000];
int Ta[200000];
int Ca[200000];
int Ab[200000];
int Tb[200000];
int Cb[200000];
int cc[200000];
void init(std::string a, std::string b) {
	int n = a.size();
	for(int i=0;i<n;i++){
		Aa[i+1] = Aa[i] + (a[i]=='A');
		Ta[i+1] = Ta[i] + (a[i]=='T');
		Ca[i+1] = Ca[i] + (a[i]=='C');

		Ab[i+1] = Ab[i] + (b[i]=='A');
		Tb[i+1] = Tb[i] + (b[i]=='T');
		Cb[i+1] = Cb[i] + (b[i]=='C');

		cc[i+1] = cc[i] + (a[i]==b[i]);
		//cout<<Aa[i+1]<<" "<<Ta[i+1]<<" "<<Ca[i+1]<<" "<<cc[i+1]<<endl;
	}
}

int get_distance(int x, int y) {
	x++, y++;
	int cnt = y-x+1;
	if(Aa[y]-Aa[x-1] != Ab[y]-Ab[x-1]) return -1;
	if(Ta[y]-Ta[x-1] != Tb[y]-Tb[x-1]) return -1;
	if(Ca[y]-Ca[x-1] != Cb[y]-Cb[x-1]) return -1;
	return (cnt - (cc[y]-cc[x-1]) + 1)/2;
}

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