Submission #1001950

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001950		vjudge1	Mutating DNA (IOI21_dna)	C++17	56 / 100	29 ms	9696 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+10;
int n;
 ll how[2][MAX][3];
ll cnt[MAX][3];
ll hold[MAX+1];
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]]]++;
        
        hold[i+1]=hold[i];
       if(A[i]!=B[i]){
            hold[i+1]++;
        }
    }
}


int get_distance(int x, int y){
    ll add = hold[y+1]-hold[x] ;
    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;
    }
     

    
  
    //cout << add<<" "<<sub<< " "<< endl;
    return (add+1)/2;
}

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: 13 / 13
• Subtask 4: 0 / 28
• Subtask 5: 0 / 16