Submission #437089

#	Time	Username	Problem	Language	Result	Execution time	Memory
437089		WnRS	Mutating DNA (IOI21_dna)	C++17	56 / 100	47 ms	4796 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
using namespace std;
 
string a,b;
vector<pair<int,int>>va,vb;
vector<int>dif;
 
void gen(void) {
    va.resize(a.length()+1);
    vb.resize(b.length()+1);
    dif.resize(a.length()+1);
    va[0]={0,0},vb[0]={0,0};
    dif[0]=0;
    for(int i = 0 ; i < a.size() ; i++) {
        va[i+1]=va[i],vb[i+1]=vb[i],dif[i+1]=dif[i];
        if(a[i]=='A') va[i+1].first++;
        else if(a[i]=='C') va[i+1].second++;
        if(b[i]=='A') vb[i+1].first++;
        else if(b[i]=='C') vb[i+1].second++;
        if(a[i] != b[i]) dif[i+1]++;
    } return;
}
 
int get_distance(int x, int y) {
   int aa=va[y+1].first-va[x].first,cc=va[y+1].second-va[x].second;
   if(aa-(vb[y+1].first-vb[x].first) || cc-(vb[y+1].second-vb[x].second)) {
    return -1;
   }
   return (dif[y+1]-dif[x]+1)/2;
}
 
void init(string aa, string bb) {
    a=aa,b=bb;
    gen();
}

Compilation message (stderr)

dna.cpp: In function 'void gen()':
dna.cpp:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(int i = 0 ; i < a.size() ; i++) {
      |                     ~~^~~~~~~~~~

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