Submission #1082329

#	Time	Username	Problem	Language	Result	Execution time	Memory
1082329		SiliconSquared	Mutating DNA (IOI21_dna)	C++17	100 / 100	29 ms	5076 KiB

dna

#include "dna.h"
using namespace std;
#include <vector>
#include <iostream>

vector<int> ca;
vector<int> ac;
vector<int> ct;
vector<int> tc;
vector<int> ta;
vector<int> at;

void init(std::string a, std::string b) {
    ca.resize(a.size()+1,0);
    ct.resize(a.size()+1,0);
    ac.resize(a.size()+1,0);
    at.resize(a.size()+1,0);
    ta.resize(a.size()+1,0);
    tc.resize(a.size()+1,0);
    for (int i=0;i<a.size();i++){
        ca[i+1]=ca[i];
        ct[i+1]=ct[i];
        at[i+1]=at[i];
        ac[i+1]=ac[i];
        ta[i+1]=ta[i];
        tc[i+1]=tc[i];
        if (a[i]=='C'){
            if (b[i]=='A'){
                ca[i+1]++;
            }else if (b[i]=='T'){
                ct[i+1]++;
            }
        }else if (a[i]=='T'){
            if (b[i]=='A'){
                ta[i+1]++;
            }else if (b[i]=='C'){
                tc[i+1]++;
            }
        }else{
            if (b[i]=='C'){
                ac[i+1]++;
            }else if (b[i]=='T'){
                at[i+1]++;
            }
        }
    }
    // for (int i:ac){cerr<<i;}cerr<<'\n';
    // for (int i:at){cerr<<i;}cerr<<'\n';
    // for (int i:ca){cerr<<i;}cerr<<'\n';
    // for (int i:ct){cerr<<i;}cerr<<'\n';
    // for (int i:ta){cerr<<i;}cerr<<'\n';
    // for (int i:tc){cerr<<i;}cerr<<'\n';
}

int get_distance(int x, int y) {
    y++;
    if (ca[y]-ca[x]+ct[y]-ct[x]!=ac[y]-ac[x]+tc[y]-tc[x]){
        return -1;
    }
    if (ta[y]-ta[x]+tc[y]-tc[x]!=at[y]-at[x]+ct[y]-ct[x]){
        return -1;
    }
    if (ac[y]-ac[x]+at[y]-at[x]!=ca[y]-ca[x]+ta[y]-ta[x]){
        return -1;
    }
    int z=ca[y]-ca[x]+ct[y]-ct[x]+ta[y]-ta[x]+tc[y]-tc[x]+ac[y]-ac[x]+at[y]-at[x];
    int t=ca[y]-ca[x]-min(ca[y]-ca[x],ac[y]-ac[x]);
    t=max(t,ac[y]-ac[x]-min(ca[y]-ca[x],ac[y]-ac[x]));
    t=max(t,at[y]-at[x]-min(ta[y]-ta[x],at[y]-at[x]));
    t=max(t,ta[y]-ta[x]-min(ta[y]-ta[x],at[y]-at[x]));
    t=max(t,tc[y]-tc[x]-min(tc[y]-tc[x],ct[y]-ct[x]));
    t=max(t,ct[y]-ct[x]-min(tc[y]-tc[x],ct[y]-ct[x]));
    z-=t;
    z-=min(ca[y]-ca[x],ac[y]-ac[x]);
    z-=min(ta[y]-ta[x],at[y]-at[x]);
    z-=min(tc[y]-tc[x],ct[y]-ct[x]);
    return z;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for (int i=0;i<a.size();i++){
      |                  ~^~~~~~~~~

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