Submission #438028

#	Time	Username	Problem	Language	Result	Execution time	Memory
438028		PiejanVDC	Mutating DNA (IOI21_dna)	C++17	100 / 100	79 ms	8272 KiB

dna

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

string s,t;
vector<vector<int>>v(100005,vector<int>(6,0));

void gen(void) {
    v[0]={0,0,0,0,0,0};
    for(int i = 0 ; i < s.length() ; i++) {
        v[i+1]=v[i];
        if(s[i] == 'A') {
            if(t[i] == 'C') v[i+1][0]++;
            else if(t[i] == 'T') v[i+1][1]++;
        } else if(s[i] == 'C') {
            if(t[i] == 'A') v[i+1][2]++;
            else if(t[i] == 'T') v[i+1][3]++;
        } else {
            if(t[i] == 'A') v[i+1][4]++;
            else if(t[i] == 'C') v[i+1][5]++;
        }
    }
}

int get_distance(int x, int y) {
    int a=v[y+1][0]-v[x][0],
    b=v[y+1][1]-v[x][1],
    c=v[y+1][2]-v[x][2],
    d=v[y+1][3]-v[x][3],
    e=v[y+1][4]-v[x][4],
    f=v[y+1][5]-v[x][5];
    int ans=0;
    int dif=min(a,c);
    ans+=dif;
    a-=dif,c-=dif;
    dif=min(b,e);
    ans+=dif;
    b-=dif,e-=dif;
    dif=min(d,f);
    ans+=dif;
    d-=dif,f-=dif;
    if(a!=d||d!=e||b!=c||c!=f) return -1;
    ans+=2*((max(a,c)+max(b,e)+max(d,f))/3);
    return ans;
}

void init(string aa, string bb) {
    s=aa,t=bb;
    gen();
}

Compilation message (stderr)

dna.cpp: In function 'void gen()':
dna.cpp:10:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i = 0 ; i < s.length() ; i++) {
      |                     ~~^~~~~~~~~~~~

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