Submission #1053234

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053234		Zicrus	Mutating DNA (IOI21_dna)	C++17	22 / 100	1592 ms	3272 KiB

dna

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

typedef long long ll;

string a, b;
vector<ll> sum;

void init(string a1, string b1) {
    a = a1; b = b1;
    sum = vector<ll>(a.size()+1);
    for (int i = 1; i <= a.size(); i++) {
        sum[i] = sum[i-1] + (a[i-1] != b[i-1]);
    }
}

int get_distance(int x, int y) {
	ll offA = 0;
    for (int i = x; i <= y; i++) {
        if (a[i] == 'A') offA++;
        if (b[i] == 'A') offA--;
    }
    if (offA != 0) return -1;
    ll cnt = sum[y+1] - sum[x];
    return cnt / 2;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:13:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for (int i = 1; i <= a.size(); i++) {
      |                     ~~^~~~~~~~~~~

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