Submission #482629

#	Time	Username	Problem	Language	Result	Execution time	Memory
482629		rc_catunta	Mutating DNA (IOI21_dna)	C++17	43 / 100	1565 ms	3780 KiB

dna

#include "dna.h"
#include <iostream>
#include <algorithm>

using namespace std;

string sa,sb;

void init(string a, string b) {
	sa=a;
	sb=b;
}

int get_distance(int x, int y) {
	if(y-x<=2){
		string a=sa.substr(x,y-x+1);
		string b=sb.substr(x,y-x+1);
		if(a==b) return 0;
		string ca = a;
		string cb = b;
		sort(ca.begin(),ca.end());
		sort(cb.begin(),cb.end());
		if(ca != cb) return -1;
		int cm = 0;
		for(int i=0;i<a.size();i++){
			if(a[i]==b[i]) cm++;
		}
		if(a.size()==3) return 2-cm;
		if(a.size()==2) return 1-cm;
	}
	else{
		string a=sa.substr(x,y-x+1);
		string b=sb.substr(x,y-x+1);
		if(a==b) return 0;
		int ct1=0,ca1=0,ct2=0,ca2=0;
		int cant_no_iguales=0;
		for(int i=0;i<a.size();i++){
			if(a[i]=='T'){
				ct1++;
				if(b[i]=='T'){
					ct2++;
				}	
				else{ // b[i]='A'
					ca2++;
					cant_no_iguales++;
				}
			}
			else{ // a[i]='A'
				ca1++;
				if(b[i]=='A'){
					ca2++;
				}
				else{ // b[i]='T'
					ct2++;
					cant_no_iguales++;
				}
			}
		}
		if(ca1==ca1 and ct1==ct2) return cant_no_iguales/2;
		else return -1;
	}
	return 0;
}	

Compilation message (stderr)

dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:25:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |   for(int i=0;i<a.size();i++){
      |               ~^~~~~~~~~
dna.cpp:37:16: 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++){
      |               ~^~~~~~~~~
dna.cpp:59:9: warning: self-comparison always evaluates to true [-Wtautological-compare]
   59 |   if(ca1==ca1 and ct1==ct2) return cant_no_iguales/2;
      |      ~~~^~~~~

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