Submission #966777

#	Time	Username	Problem	Language	Result	Execution time	Memory
966777		SuPythony	Mutating DNA (IOI21_dna)	C++17	56 / 100	31 ms	6612 KiB

dna

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

vector<int> pf(1e5+1,0);
vector<vector<int>> pf2(3, vector<int>(1e5+1,0));
vector<vector<int>> pf3(3, vector<int>(1e5+1,0));

void init(string a, string b) {
    for (int i=1; i<=a.size(); i++) {
        if (a[i-1]!=b[i-1]) {
            pf[i]=pf[i-1]+1;
        } else {
            pf[i]=pf[i-1];
        }
    }
    for (int i=1; i<=a.size(); i++) {
        if (a[i-1]=='A') pf2[0][i]=pf2[0][i-1]+1;
        else pf2[0][i]=pf2[0][i-1];
        if (a[i-1]=='C') pf2[1][i]=pf2[1][i-1]+1;
        else pf2[1][i]=pf2[1][i-1];
        if (a[i-1]=='A') pf2[2][i]=pf2[2][i-1]+1;
        else pf2[2][i]=pf2[2][i-1];
    }
    for (int i=1; i<=a.size(); i++) {
        if (b[i-1]=='A') pf3[0][i]=pf3[0][i-1]+1;
        else pf3[0][i]=pf3[0][i-1];
        if (b[i-1]=='C') pf3[1][i]=pf3[1][i-1]+1;
        else pf3[1][i]=pf3[1][i-1];
        if (b[i-1]=='A') pf3[2][i]=pf3[2][i-1]+1;
        else pf3[2][i]=pf3[2][i-1];
    }
}

int get_distance(int x, int y) {
    x++; y++;
    if ((pf2[0][y]-pf2[0][x-1])!=(pf3[0][y]-pf3[0][x-1])||(pf2[1][y]-pf2[1][x-1])!=(pf3[1][y]-pf3[1][x-1])||(pf2[2][y]-pf2[2][x-1])!=(pf3[2][y]-pf3[2][x-1])) return -1;
    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:10:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for (int i=1; i<=a.size(); i++) {
      |                   ~^~~~~~~~~~
dna.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (int i=1; i<=a.size(); i++) {
      |                   ~^~~~~~~~~~
dna.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for (int i=1; i<=a.size(); i++) {
      |                   ~^~~~~~~~~~

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