Submission #1118050

#	Time	Username	Problem	Language	Result	Execution time	Memory
1118050		nickolasarapidis	Mutating DNA (IOI21_dna)	C++17	21 / 100	27 ms	6412 KiB

dna

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

int N;

vector<tuple<int, int, int>> cntA(100001, make_tuple(0, 0, 0));
vector<tuple<int, int, int>> cntB(100001, make_tuple(0, 0, 0));

vector<int> A(100001);

// 0 = A, 1 = T, 2 = C

int get_distance(int x, int y){
    //if(x == 0 and cntA[y] != cntB[y]) return -1;
    if(get<0>(cntA[y]) - get<0>(cntA[x - 1]) != get<0>(cntB[y]) - get<0>(cntB[x - 1]) or get<1>(cntA[y]) - get<1>(cntA[x - 1]) != get<1>(cntB[y]) - get<1>(cntB[x - 1]) or get<2>(cntA[y]) - get<2>(cntA[x - 1]) != get<2>(cntB[y]) - get<2>(cntB[x - 1])){
        return -1;
    }
    
    if(x == 0){
        if(A[y] != 0) return A[y] - 1;
        else return 0;
    }
    if(A[y] - A[x - 1] != 0) return A[y] - A[x - 1] - 1;
    else return 0;
}

void init(string a, string b){
    N = a.size();
    
    for(int i = 0; i < N; i++){
        if(i != 0) cntA[i] = cntA[i - 1];
        if(a[i] == 'A') get<0>(cntA[i])++;
        else if(a[i] == 'T') get<1>(cntA[i])++;
        else get<2>(cntA[i])++;
    }
    
    for(int i = 0; i < N; i++){
        if(i != 0) cntB[i] = cntB[i - 1];
        if(b[i] == 'A') get<0>(cntB[i])++;
        else if(b[i] == 'T') get<1>(cntB[i])++;
        else get<2>(cntB[i])++;
    }
    
    if(a[0] != b[0]) A[0] = 1;
    else A[0] = 0;
    
    for(int i = 1; i < N; i++){
        A[i] = A[i - 1];
        if(a[i] != b[i]) A[i]++;
    }
}

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