# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
110428 | pamaj | Growing Vegetable is Fun 3 (JOI19_ho_t3) | C++14 | 3 ms | 300 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
const int maxn = 410;
int n;
bool check(vector<pair<char, int>> &t)
{
for(int i = 0; i < t.size() - 1; i++)
if(t[i].first == t[i + 1].first) return false;
return true;
}
void next_try(string &t)
{
for(int p = t.size() - 1; p > 0; p--)
{
swap(t[p], t[p - 1]);
}
}
int qt[4];
int main()
{
cin >> n;
vector<char> s, t;
for(int i = 0; i < n; i++)
{
char c;
cin >> c;
int tipo;
if(c == 'R') tipo = 1;
else if(c == 'G') tipo = 2;
else tipo = 3;
qt[tipo]++;
s.push_back(c);
}
string crct;
int metade = n/2 + (n % 2 == 1);
if(qt[1] > metade or qt[2] > metade or qt[3] > metade)
{
cout << -1 << "\n";
return 0;
}
int cont = 0;
vector<char> ch[3];
for(int i = 0; i < qt[1]; i++) ch[0].push_back('R');
for(int i = 0; i < qt[2]; i++) ch[1].push_back('G');
for(int i = 0; i < qt[3]; i++) ch[2].push_back('Y');
for(int i = 0; i < n; i++)
{
while((int)ch[cont].size() == 0) cont++, cont %= 3;
crct += ch[cont][0];
ch[cont].pop_back();
cont++;
cont %= 3;
}
//cout << crct << "\n";
int ans = 1e9;
for(int j = 0; j < n; j++)
{
next_try(crct);
//cout << crct << "\n";
vector<int> v1r, v1g, v1y;
vector<int> v2r, v2g, v2y;
for(int i = 0; i < n; i++)
{
if(s[i] == 'R')
{
v1r.push_back(i);
}
if(s[i] == 'G')
{
v1g.push_back(i);
}
if(s[i] == 'Y')
{
v1y.push_back(i);
}
if(crct[i] == 'R')
{
v2r.push_back(i);
}
if(crct[i] == 'G')
{
v2g.push_back(i);
}
if(crct[i] == 'Y')
{
v2y.push_back(i);
}
}
int num_dif = 0;
for(int i = 0; i < v1y.size(); i++)
{
num_dif += abs(v1y[i] - v2y[i]);
}
for(int i = 0; i < v1r.size(); i++)
{
num_dif += abs(v1r[i] - v2r[i]);
}
for(int i = 0; i < v1g.size(); i++)
{
num_dif += abs(v1g[i] - v2g[i]);
}
ans = min(ans, num_dif/2);
}
cout << (ans == (int)1e9 ? -1 : ans) << "\n";
}
Compilation message (stderr)
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