Submission #1082327

#	Time	Username	Problem	Language	Result	Execution time	Memory
1082327		Cyanberry	Mutating DNA (IOI21_dna)	C++17	100 / 100	31 ms	7440 KiB

dna

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

int sums[100010][9];
int len;

void init(string a, string b) {
	int thing[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
	len = a.size();
	for (int i = 0; i < a.size(); ++i) {
		int app = 0;
		if (a[i] == 'T') app += 6;
		else if (a[i] == 'C') app += 3;
		if (b[i] == 'T') app += 2;
		else if (b[i] == 'C') app += 1;
		// cout<<a[i]<<b[i]<<' '<<app<<'\n';
		++thing[app];
		for (int j = 0; j < 9; ++j) {
			sums[i][j] = thing[j];
		}
	}
	
}

/*
  A C T
A 0 1 2
C 3 4 5
T 6 7 8

*/

int get_distance(int x, int y) {
	int ret[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
	for (int i = 0; i < 9; ++i) {
		if (x == 0) {
			ret[i] = sums[y][i];
		} else {
			ret[i] = sums[y][i] - sums[x - 1][i];
		}
		// cout<<ret[i]<<' ';
	}
	// cout<<'\n';
	int out = 0;
	int ACs = min(ret[1], ret[3]);
	ret[1] -= ACs, ret[3] -= ACs;
	int ATs = min(ret[2], ret[6]);
	ret[2] -= ATs, ret[6] -= ATs;
	int CTs = min(ret[5], ret[7]);
	ret[5] -= CTs, ret[7] -= CTs;
	out += ACs + ATs + CTs;
	if (ret[1] != ret[5] || ret[5] != ret[6]) return -1;
	if (ret[3] != ret[7] || ret[7] != ret[2]) return -1;
	out += (ret[1] + ret[3]) * 2;
	return out;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:11:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for (int i = 0; i < a.size(); ++i) {
      |                  ~~^~~~~~~~~~

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