Submission #614491

#	Time	Username	Problem	Language	Result	Execution time	Memory
614491		serize	Mutating DNA (IOI21_dna)	C++17	100 / 100	54 ms	8592 KiB

dna

#include "dna.h"
#include <cstdio>
#include <cassert>
#include <string>
#include <vector>

using namespace std;
const int MAX = 1e5+2;

vector<int> A(MAX), Ab(MAX), C(MAX), Cb(MAX), T(MAX), Tb(MAX), AC(MAX), CA(MAX), AT(MAX), TA(MAX), CT(MAX), TC(MAX); 

void init(std::string a, std::string b) {
    int n = a.size();
    for(int i = 0; i < n; i++){
        if(a[i] == 'A') A[i+1]++;
        if(a[i] == 'C') C[i+1]++;
        if(a[i] == 'T') T[i+1]++;
        if(b[i] == 'A') Ab[i+1]++;
        if(b[i] == 'C') Cb[i+1]++;
        if(b[i] == 'T') Tb[i+1]++;
        if(a[i] == 'A'){
            if(b[i] == 'C') AC[i+1]++;
            if(b[i] == 'T') AT[i+1]++;
        }
        if(a[i] == 'C'){
            if(b[i] == 'A') CA[i+1]++;
            if(b[i] == 'T') CT[i+1]++;
        }
        if(a[i] == 'T'){
            if(b[i] == 'A') TA[i+1]++;
            if(b[i] == 'C') TC[i+1]++;
        }
        A[i+2] = A[i+1];
        C[i+2] = C[i+1];
        T[i+2] = T[i+1];
        Ab[i+2] = Ab[i+1];
        Cb[i+2] = Cb[i+1];
        Tb[i+2] = Tb[i+1];
        AC[i+2] = AC[i+1];
        CA[i+2] = CA[i+1]; 
        AT[i+2] = AT[i+1];
        TA[i+2] = TA[i+1];
        CT[i+2] = CT[i+1];
        TC[i+2] = TC[i+1];
    }
}

int get_distance(int x, int y) {
	x++,y++;
    if(A[y]-A[x-1] != Ab[y]-Ab[x-1]) return -1;
    if(C[y]-C[x-1] != Cb[y]-Cb[x-1]) return -1;
    if(T[y]-T[x-1] != Tb[y]-Tb[x-1]) return -1;
    int a = AC[y]-AC[x-1], b = CA[y]-CA[x-1], c = AT[y]-AT[x-1], d = TA[y]-TA[x-1], e = CT[y]-CT[x-1], f = TC[y]-TC[x-1];
    if(a > b) swap(a,b);
    return (a+min(c,d)+min(e,f)+(2*b)-2*a);
}

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