Submission #580270

#	Time	Username	Problem	Language	Result	Execution time	Memory
580270		rc_catunta	Mutating DNA (IOI21_dna)	C++17	43 / 100	1564 ms	2900 KiB

dna

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

string sa, sb;
vector<int> acum;

void init(string a, string b) {
	sa = a;
	sb = b;
	// Construimos la tabla de acumuladas
	acum.assign(a.size(),0);
	for(int i=0;i<a.size();i++){
		if(a[i]!=b[i]) acum[i]++;
		if(i>0) acum[i]+=acum[i-1];
	}
}

bool posible_transformar(string a, string b){
	string ca=a,cb=b;
	sort(ca.begin(),ca.end());
	sort(cb.begin(),cb.end());
	return ca==cb;
}

int get_distance(int x, int y) {
	string a = sa.substr(x,y-x+1);
	string b = sb.substr(x,y-x+1);
	// SUBTASK 1
	if(y-x<=2){	
		if(a==b) return 0;
		if(posible_transformar(a,b)){
			if(y-x==1) return 1;
			// Contar letras igual
			int cont = 0;
			for(int i=0;i<a.size();i++){
				if(a[i]==b[i]) cont++;
			}
			if(cont==1) return 1;
			else return 2;
		}
		else return -1;
	}
	// SUBTASK 2 Y 3
	if(posible_transformar(a,b)){
		int cont_des = acum[y];
		if(x>0) cont_des -= acum[x-1];
		return(cont_des/2);
	}
	else return -1;

}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:14:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for(int i=0;i<a.size();i++){
      |              ~^~~~~~~~~
dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:37:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |    for(int i=0;i<a.size();i++){
      |                ~^~~~~~~~~

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