Submission #1001908

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001908		vjudge1	Mutating DNA (IOI21_dna)	C++17	43 / 100	1559 ms	8548 KiB

dna

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
#define pb push_back
#define pf push_front
#define pi pair<int,int>

string a,b;
const int MAX = 1e5+1;
int n;
 ll how[2][MAX][3];
ll cnt[MAX][3];

map<char,int>mtch;
void init(string A, string B){

    a = A;
    b = B;
    mtch['A']=0;
    mtch['C']=1;
    mtch['T']=2;
    for(int i = 0; i <a.size(); i++){
        for(int j = 0; j<3; j++){
            how[0][i+1][j] = how[0][i][j] ;
            how[1][i+1][j] = how[1][i][j] ;
         //   cnt[i+1][j] = cnt[i][j];
        }
       // cout << mtch[A[i]]<<" s "<< mtch[B[i]]<<endl;
        how[0][i+1][mtch[A[i]]]++;
        how[1][i+1][mtch[B[i]]]++;
        
        
      /*  if(A[i]!=B[i])[
            cnt[i+2][mtch[B[i]]]++;
        }*/
    }
}


int get_distance(int x, int y){
    ll add = 0;
    ll sub = 0;
    ll mp[3];
    memset(mp,0,sizeof(mp));
    int vala,valb;
    for(int i =0; i < 3; i++){

         vala = how[0][y+1][i]-how[0][x][i];
         valb =  how[1][y+1][i]-how[1][x][i];
       //  cout<< vala<<" " << valb << endl;
        if(vala!=valb) return -1;
    }
     

    
     for(int i = x; i<= y; i++){
       if(a[i]!=b[i]){
           if(mp[mtch[a[i]]]){
                //sub++;
                mp[mtch[a[i]]]--;
           }
           else{
                mp[mtch[b[i]]]++;
                add++;
           }
    
            
       }
         
    }
  
    //cout << add<<" "<<sub<< " "<< endl;
    return add;
}



/*
int main(){
    int n,q ;
    cin >> n >> q;
    string a,b;
    cin >> a >>b;
    
    init(a,b);
    int x,y;
    while(q--){
        cin >> x >>y;
        cout << get_distance(x,y)<<endl;
    }
}
*/

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i = 0; i <a.size(); i++){
      |                    ~~^~~~~~~~~
dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:44:8: warning: unused variable 'sub' [-Wunused-variable]
   44 |     ll sub = 0;
      |        ^~~

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