Submission #729109

#	Time	Username	Problem	Language	Result	Execution time	Memory
729109		vjudge1	Mutating DNA (IOI21_dna)	C++17	0 / 100	33 ms	4544 KiB

dna

#include "dna.h"
#include<bits/stdc++.h>
#define eb emplace_back

const int up=1e5+1;
std::vector<char>A,B;
std::vector<int>cnt,cntAA,cntTA,cntAB,cntTB;

void init(std::string a, std::string b) {
    A.eb(' ');
    B.eb(' ');
    cnt.resize(a.size()+1,0);
    cntAA.resize(a.size()+1,0);
    cntAB.resize(a.size()+1,0);
    cntTA.resize(a.size()+1,0);
    cntTB.resize(a.size()+1,0);
    for(int i=0;i<a.size();++i){
        A.eb(a[i]);
        B.eb(b[i]);
        if(a[i]!=b[i]){
            cnt[i+1]=cnt[i]+1;
        }
        else{
            cnt[i+1]=cnt[i];
        }
        if(a[i]=='A'){
            cntAA[i+1]=cntAA[i]+1;
            cntTA[i+1]=cntTA[i];
        }
        else{
            cntTA[i+1]=cntTA[i]+1;
            cntAA[i+1]=cntAA[i];
        }
        if(B[i]=='A'){
            cntAB[i+1]=cntAB[i]+1;
            cntTB[i+1]=cntTB[i];
        }
        else{
            cntTB[i+1]=cntTB[i]+1;
            cntAB[i+1]=cntAB[i];
        }
    }
}

int get_distance(int x,int y){
    x++;
    y++;
    int noA=cntAA[y]-cntAA[x-1]-cntAB[y]+cntAB[x-1],noT=cntTA[y]-cntTA[x-1]-cntTB[y]+cntTB[x-1];
    int res=cnt[y]-cnt[x-1];

    if(noA!=0 or noT!=0) return -1;
	return res/2;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:17:18: 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=0;i<a.size();++i){
      |                 ~^~~~~~~~~

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