Submission #440775

#	Time	Username	Problem	Language	Result	Execution time	Memory
440775		jlozano254	Mutating DNA (IOI21_dna)	C++17	56 / 100	196 ms	44188 KiB

dna

#include "dna.h"
#include <map>
#include <vector>

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;

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

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

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

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

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for (int i = 1; i < a.length(); ++i)
      |                  ~~^~~~~~~~~~~~

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