Submission #440850

#	Time	Username	Problem	Language	Result	Execution time	Memory
440850		jlozano254	Mutating DNA (IOI21_dna)	C++17	56 / 100	183 ms	44204 KiB

dna

#include "dna.h"
#include <map>
#include <vector>
//using namespace std;

std::vector<std::map<char, int>> aDP;
std::vector<std::map<char, int>> bDP;

void init(std::string a, std::string b) {
	std::vector<std::map<char, int>> aux(a.length() + 1);

	aDP = aux;
	bDP = aux;

	aDP[0]['A'] = 0;
	aDP[0]['C'] = 0;
	aDP[0]['T'] = 0;

	bDP[0]['A'] = 0;
	bDP[0]['C'] = 0;
	bDP[0]['T'] = 0;

  if (a[0] != b[0]) {
		aDP[1][a[0]]++;
		bDP[1][b[0]]++;
	}
	for (int i = 1; i < (int) a.length(); ++i)
	{
		aDP[i + 1] = aDP[i];
		bDP[i + 1] = bDP[i];

		if (a[i] != b[i])
		{
			aDP[i + 1][a[i]]++;
			bDP[i + 1][b[i]]++;
		}
	}
}

int get_distance(int x, int y) {
	//if (x > 1) x--;
	//if (y > 1) y--;
	y++;

	int aAcumA = aDP[y]['A'] - aDP[x]['A'];
	int aAcumC = aDP[y]['C'] - aDP[x]['C'];
	int aAcumT = aDP[y]['T'] - aDP[x]['T'];

	int bAcumA = bDP[y]['A'] - bDP[x]['A'];
	int bAcumC = bDP[y]['C'] - bDP[x]['C'];
	int bAcumT = bDP[y]['T'] - bDP[x]['T'];

 //  printf("x: %i\ny: %i\n", x, y);

	// printf("aDP[y]['A']: %i\n", aDP[y]['A']);
	// printf("aDP[y]['C']: %i\n", aDP[y]['C']);
	// printf("aDP[y]['T']: %i\n", aDP[y]['T']);
	// printf("aDP[x]['A']: %i\n", aDP[x]['A']);
	// printf("aDP[x]['C']: %i\n", aDP[x]['C']);
	// printf("aDP[x]['T']: %i\n", aDP[x]['T']);

	// printf("bDP[y]['A']: %i\n", bDP[y]['A']);
	// printf("bDP[y]['C']: %i\n", bDP[y]['C']);
	// printf("bDP[y]['T']: %i\n", bDP[y]['T']);
	// printf("bDP[x]['A']: %i\n", bDP[x]['A']);
	// printf("bDP[x]['C']: %i\n", bDP[x]['C']);
	// printf("bDP[x]['T']: %i\n", bDP[x]['T']);

	// printf("aAcumA: %i\n", aAcumA);
	// printf("aAcumC: %i\n", aAcumC);
	// printf("aAcumT: %i\n", aAcumT);
	// printf("bAcumA: %i\n", bAcumA);
	// printf("bAcumC: %i\n", bAcumC);
	// printf("bAcumT: %i\n", bAcumT);

	// printf("\n");

	if (aAcumA != bAcumA || aAcumC != bAcumC || aAcumT != bAcumT) return -1;

  int total = aAcumA + aAcumC + aAcumT;
  int moves = total >> 1;

  // printf("Total: %i\n", total);

	return (total & 1) ? moves + 1 : moves;
}

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