Submission #483148

#	Time	Username	Problem	Language	Result	Execution time	Memory
483148		rc_catunta	Mutating DNA (IOI21_dna)	C++17	56 / 100	34 ms	6072 KiB

dna

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

string sa,sb;
vector<int>ct1,ca1,ct2,ca2,dif;
void init(string a, string b) {
	sa=a;
	sb=b;
	int tam = a.size();
	ct1.assign(tam,0);
	ca1.assign(tam,0);
	ct2.assign(tam,0);
	ca2.assign(tam,0);
	dif.assign(tam,0);

	for(int i=0;i<tam;i++){
		if(i>0){
			ct1[i]=ct1[i-1];
			ca1[i]=ca1[i-1];
			ct2[i]=ct2[i-1];
			ca2[i]=ca2[i-1];
			dif[i]=dif[i-1];
		}
		if(a[i]=='T') ct1[i]++;
		if(a[i]=='A') ca1[i]++;
		if(b[i]=='T') ct2[i]++;
		if(b[i]=='A') ca2[i]++;
		if(a[i]!=b[i]) dif[i]++;
	}

}

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 cot1=0,coa1=0,cot2=0,coa2=0;
		int cant_no_iguales=0;
		if(x>0){
			cot1 = ct1[y]-ct1[x-1];
			coa1 = ca1[y]-ca1[x-1];
			cot2 = ct2[y]-ct2[x-1];
			coa2 = ca2[y]-ca2[x-1];
			cant_no_iguales = dif[y]-dif[x-1];
		}
		else{
			cot1 = ct1[y];
			coa1 = ca1[y];
			cot2 = ct2[y];
			coa2 = ca2[y];
			cant_no_iguales = dif[y];
		}
		
		if(coa1==coa1 and cot1==cot2) return cant_no_iguales/2;
		else return -1;
	}
	return 0;
}	

Compilation message (stderr)

dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:47:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for(int i=0;i<a.size();i++){
      |               ~^~~~~~~~~
dna.cpp:74:10: warning: self-comparison always evaluates to true [-Wtautological-compare]
   74 |   if(coa1==coa1 and cot1==cot2) return cant_no_iguales/2;
      |      ~~~~^~~~~~
dna.cpp:57:28: warning: variable 'coa2' set but not used [-Wunused-but-set-variable]
   57 |   int cot1=0,coa1=0,cot2=0,coa2=0;
      |                            ^~~~

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