Submission #535192

#	Time	Username	Problem	Language	Result	Execution time	Memory
535192		DJ035	Mutating DNA (IOI21_dna)	C++17	100 / 100	56 ms	15628 KiB

dna

#include "dna.h"
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,avx,avx2")
#include <bits/stdc++.h>
#define MEM 222222
#define sanic ios_base::sync_with_stdio(0)
#define x first
#define y second
#define pf push_front
#define pb push_back
#define all(v) v.begin(), v.end()
#define sz size()
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pi;
const ll INF = 1e17+7;
const ll MOD = 998244353;
ll gcd(ll a, ll b){
    if(a%b) return gcd(b, a%b);
    return b;
}
ll n,m;
ll aa[MEM][3], bb[MEM][3];
ll cc[MEM][3][3];
string c, d;
void init(std::string a, std::string b) {
    for(int i=0; i<a.sz; i++){
        aa[i+1][0] = aa[i][0] + (a[i]=='A');
        aa[i+1][1] = aa[i][1] + (a[i]=='C');
        aa[i+1][2] = aa[i][2] + (a[i]=='T');
    }
    for(int i=0; i<b.sz; i++){
        bb[i+1][0] = bb[i][0] + (b[i]=='A');
        bb[i+1][1] = bb[i][1] + (b[i]=='C');
        bb[i+1][2] = bb[i][2] + (b[i]=='T');
    }
    for(int i=0; i<b.sz; i++){
        for(int j=0; j<3; j++)
            for(int k=0; k<3; k++)
                cc[i+1][j][k] = cc[i][j][k];
        ll x=(a[i]=='A' ? 0:(a[i]=='C'?1:2));
        ll y=(b[i]=='A' ? 0:(b[i]=='C'?1:2));
        cc[i+1][x][y]++;
    }
}

int get_distance(int x, int y) {
	for(int i=0; i<3; i++)
        if(aa[y+1][i]-aa[x][i]!=bb[y+1][i]-bb[x][i]) return -1;
    ll d[3][3];
    for(int i=0; i<3; i++)
        for(int j=0; j<3; j++)
            d[i][j] = cc[y+1][i][j]-cc[x][i][j];
    /*
    for(int i=0; i<3; i++)
        for(int j=0; j<3; j++)
            if(i!=j)cout << i << ' ' << j << ' ' << d[i][j] << '\n';
    */
    ll ans = 2*(d[0][1]+d[1][0])-3*min(d[1][0], d[0][1])+min(d[0][2], d[2][0])+min(d[1][2],d[2][1]);
	return ans;
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for(int i=0; i<a.sz; i++){
      |                   ^
dna.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(int i=0; i<b.sz; i++){
      |                   ^
dna.cpp:39:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(int i=0; i<b.sz; i++){
      |                   ^

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