Submission #716239

#	Time	Username	Problem	Language	Result	Execution time	Memory
716239		kidlin	Mutating DNA (IOI21_dna)	C++17	71 / 100	1580 ms	3828 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
 
using namespace std;
 
 
string s, t;
void init(std::string a, std::string b)
{
    s = a;
    t = b;
}
 
int get_distance(int x, int y)
{
 
 
    string s1 = s.substr(x, y - x + 1);
    string t1 = t.substr(x, y - x + 1);
 
    int ans = 0;
    for (int i = 0; i < t1.size(); i ++)
    {
        if (s1[i] == t1[i])
            continue;
 
        bool done = false;
        for (int j = i; j < t1.size(); j ++)
        {
            if (s1[j] == t1[i] && t1[j] == s1[i])
            {
                swap(s1[j], s1[i]);
                ans ++;
                done = true;
                break;
            }
        }
 
        if (!done)
        {
            for (int j = i; j < t1.size(); j ++)
            {
                if (s1[j] == t1[i] && s1[j] != t1[j])
                {
                    swap(s1[j], s1[i]);
                    ans ++;
                    done = true;
                    break;
                }
            }
        }
            ///cout << i << " : " << j << endl;
        if (!done)
            return -1;
    }
    return ans;
}

Compilation message (stderr)

dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for (int i = 0; i < t1.size(); i ++)
      |                     ~~^~~~~~~~~~~
dna.cpp:28:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for (int j = i; j < t1.size(); j ++)
      |                         ~~^~~~~~~~~~~
dna.cpp:41:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |             for (int j = i; j < t1.size(); j ++)
      |                             ~~^~~~~~~~~~~

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