Submission #938540

#	Time	Username	Problem	Language	Result	Execution time	Memory
938540		Hugo1729	Mutating DNA (IOI21_dna)	C++17	35 / 100	33 ms	4968 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
using namespace std;

string a,b;
int n;
int prefa[100001]={0},prefb[100001]={0},prefm[100001]={0};

void init(string c, string d) {
  a=c;b=d;
  n=a.size();
  for(int i=0;i<n;i++){
    prefa[i+1]=prefa[i];
    prefb[i+1]=prefb[i];
    prefm[i+1]=prefm[i];
    if(a[i]=='A')prefa[i+1]++;
    if(b[i]=='A')prefb[i+1]++;
    if(a[i]==b[i])prefm[i+1]++;
  }

}

int get_distance(int x, int y) {
  int dista=prefa[y+1]-prefa[x];
  int distb=prefb[y+1]-prefb[x];
  int distm=(prefm[y+1]-prefm[x]);

  if(dista!=distb)return -1;
  else{
    return (y-x+1-distm)/2;
  }
}

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