Submission #966768

#	Time	Username	Problem	Language	Result	Execution time	Memory
966768		SuPythony	Mutating DNA (IOI21_dna)	C++17	0 / 100	23 ms	2832 KiB

dna

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

vector<int> pf(1e5+1,0);

void init(string a, string b) {
    for (int i=1; i<=a.size(); i++) {
        if (a[i]!=b[i]) {
            pf[i]=pf[i-1]+1;
        } else {
            pf[i]=pf[i-1];
        }
    }
}

int get_distance(int x, int y) {
    int c=pf[y]-pf[x-1];
    return c/2+c%2;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:8:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for (int i=1; i<=a.size(); i++) {
      |                   ~^~~~~~~~~~

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