Submission #1142004

#	Time	Username	Problem	Language	Result	Execution time	Memory
1142004		mouataz_moi	Mutating DNA (IOI21_dna)	C++20	Compilation error	0 ms	0 KiB

dna

#include "dna.h"
#include<bits/stdc++.h>
using namespace std;
string a;
string b;
void init(string n, string m) {
    a = n;
    b = m;
}

int get_distance(int x, int y) {
    string b1;
    string b2;
	int ans = 0;
	int c_count = 0;
    int t_count = 0;
    int a_count = 0;
    int t_count2 = 0;
    int a_count2 = 0;
    int c_count2 = 0;
    a1 = a.substr(x,y-x);
    b2 = b.substr(x,y-x);
    for(int i = 0;i < a1.length();i++){
        if(a1[i] == 'T'){
            t_count++;
        }
        if(a1[i] == 'A'){
            a_count++;
        }
        if(b2[i] == 'T'){
            t_count2++;
        }
        if(b2[i] == 'A'){
            a_count2++;
        }
        if(a1[i] == 'C'){
            c_count++;
        }
        if(b2[i] == 'C'){
            c_count2++;
        }
        if(a1[i] != b2[i]){
            ans++;
        }
    }
    if((t_count != t_count2) || (a_count != a_count2) || (c_count != c_count2)){
        return -1;
    }
    return ans/2;
    
}

Compilation message (stderr)

dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:21:5: error: 'a1' was not declared in this scope; did you mean 'b1'?
   21 |     a1 = a.substr(x,y-x);
      |     ^~
      |     b1