Submission #669802

#	Time	Username	Problem	Language	Result	Execution time	Memory
669802		Marszpace	Mutating DNA (IOI21_dna)	C++17	0 / 100	30 ms	3916 KiB

dna

#include<bits/stdc++.h>
using namespace std;
vector<bool> diff;
string aGlobal,bGlobal;
void init(string a, string b){
    for(int i=0;i<a.size();i++){
        diff.push_back(!(a[i]==b[i]));
    }
    aGlobal=a;
    bGlobal=b;
}

int get_distance(int x, int y){
    int a[3],b[3];
    for(int i=x;i<=y;i++){
        if(aGlobal[i]=='A'){a[0]++;}
        else if(aGlobal[i]=='T'){a[1]++;}
        else if(aGlobal[i]=='C'){a[2]++;}

        if(bGlobal[i]=='A'){b[0]++;}
        else if(bGlobal[i]=='T'){b[1]++;}
        else if(bGlobal[i]=='C'){b[2]++;}
    }
    if(a[0]!=b[0]||a[1]!=b[1]||a[2]!=b[2]){return -1;}
    int res=0;
    for(int i=x;i<=y;i++){
        if(diff[i]){res++;}
    }
    return res/2;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i=0;i<a.size();i++){
      |                 ~^~~~~~~~~
dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:24:18: warning: 'a[1]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   24 |     if(a[0]!=b[0]||a[1]!=b[1]||a[2]!=b[2]){return -1;}
      |        ~~~~~~~~~~^~~~~~~~~~~~
dna.cpp:24:18: warning: 'b[1]' may be used uninitialized in this function [-Wmaybe-uninitialized]
dna.cpp:24:5: warning: 'a[0]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   24 |     if(a[0]!=b[0]||a[1]!=b[1]||a[2]!=b[2]){return -1;}
      |     ^~
dna.cpp:24:5: warning: 'b[0]' may be used uninitialized in this function [-Wmaybe-uninitialized]
dna.cpp:24:30: warning: 'a[2]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   24 |     if(a[0]!=b[0]||a[1]!=b[1]||a[2]!=b[2]){return -1;}
      |        ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
dna.cpp:24:30: warning: 'b[2]' may be used uninitialized in this function [-Wmaybe-uninitialized]

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