Submission #675612

#	Time	Username	Problem	Language	Result	Execution time	Memory
675612		12332100	Mutating DNA (IOI21_dna)	C++17	35 / 100	34 ms	6612 KiB

dna

#include "dna.h"
#include<bits/stdc++.h>
using namespace std;
string s,ss;
int dna[2][3][100001],jem[100001];
map<char,int>mp;
void init(string s,string ss) {
	mp['A']=0;
	mp['T']=1;
	mp['C']=2;
	dna[0][mp[s[0]]][0]=1;
	dna[1][mp[ss[0]]][0]=1;
	for(int i=1;i<s.size();i++){
		if(s[i]==ss[i])jem[i]=jem[i-1]+1;
		else jem[i]=jem[i-1];
		//
		for(int j=0;j<3;j++){
			dna[0][j][i]=dna[0][j][i-1];
			dna[1][j][i]=dna[1][j][i-1];
		}
		dna[0][mp[s[i]]][i]++;
		dna[1][mp[ss[i]]][i]++;
	}
}

int get_distance(int x, int y) {
	int ans,a1,a2,t1,t2;
	if(x>0){
		ans=jem[y]-jem[x-1];
		a1=dna[0][0][y]-dna[0][0][x-1];
		a2=dna[1][0][y]-dna[1][0][x-1];
		t1=dna[0][1][y]-dna[0][1][x-1];
		t2=dna[1][1][y]-dna[1][1][x-1];
	}
	else{
		ans=jem[y];
		a1=dna[0][0][y];
		a2=dna[1][0][y];
		t1=dna[0][1][y];
		t2=dna[1][1][y];
	}
	if(a1!=a2 || t1!=t2)return -1;
	return ((y-x+1)-ans)/2;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:13:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for(int i=1;i<s.size();i++){
      |              ~^~~~~~~~~

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