Submission #580274

#	Time	Username	Problem	Language	Result	Execution time	Memory
580274		rc_catunta	Mutating DNA (IOI21_dna)	C++17	56 / 100	761 ms	6156 KiB

dna

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

string sa, sb;
vector<int> acumd,acuma1,acuma2,acumt1,acumt2;

void init(string a, string b) {
	sa = a;
	sb = b;
	// Construimos la tabla de acumuladas
	acumd.assign(a.size(),0);
	acuma1.assign(a.size(),0);
	acumt1.assign(a.size(),0);
	acuma2.assign(a.size(),0);
	acumt2.assign(a.size(),0);
	for(int i=0;i<a.size();i++){
		// Acum d
		if(a[i]!=b[i]) acumd[i]++;
		if(i>0) acumd[i]+=acumd[i-1];
		// Acum A para el string 1
		if(a[i]=='A') acuma1[i]++;
		if(i>0) acuma1[i]+=acuma1[i-1];
		// Acum A para el string 2
		if(b[i]=='A') acuma2[i]++;
		if(i>0) acuma2[i]+=acuma2[i-1];
		// Acum T para el string 1
		if(a[i]=='T') acumt1[i]++;
		if(i>0) acumt1[i]+=acumt1[i-1];
		// Acum T para el string 2
		if(b[i]=='T') acumt2[i]++;
		if(i>0) acumt2[i]+=acumt2[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
	// Se puede?
	int cont_a1 = acuma1[y];
	int cont_a2 = acuma2[y];
	int cont_t1 = acumt1[y];
	int cont_t2 = acumt2[y];
	int cont_des = acumd[y];
	if(x>0){
		cont_des -= acumd[x-1];
		cont_a1 -= acuma1[x-1];
		cont_a2 -= acuma2[x-1];
		cont_t1 -= acumt1[x-1];
		cont_t2 -= acumt2[x-1];
	}
	if(cont_a1 == cont_a2 and cont_t1 == cont_t2){
		if(cont_des%2 == 0){
			return cont_des/2;
		}
		else return -1;
	}
	else return -1;
	

}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:18:15: 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=0;i<a.size();i++){
      |              ~^~~~~~~~~
dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:55:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |    for(int i=0;i<a.size();i++){
      |                ~^~~~~~~~~

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