#include <bits/stdc++.h>
using namespace std;
#define inf 0x3F3F3F3F3F3F3F3F
const int MXN = 20 + 5;
const int mod = 1e9 + 7;
const int LOG = 20;
int n;
vector<array<int, 3>> res;
int ok(vector<array<int, 3>> &v)
{
if (v.size() == 3)
{
return v[0][0] != v[1][0] && v[0][0] != v[2][0] && v[1][0] != v[2][0];
}
int cnt = 0
for (int i = 0; i < v.size(); i++)
{
if (v[i][0] != v[(i + 1) % (int)v.size()][0])
{
vector<array<int, 3>> nw;
for (int j = 0; j < v.size(); j++)
{
if (j != i && j != (i + 1) % (int)v.size())
{
nw.push_back(v[j]);
}
else if (j == i)
{
nw.push_back({6 - v[i][0] - v[(i + 1) % (int)v.size()][0], v[i][1], v[(i + 1) % (int)v.size()][2]});
}
}
if (ok(nw))
{
res.push_back({v[i][1], v[(i + 1) % (int)v.size()][2], 6 - v[i][0] - v[(i + 1) % (int)v.size()][0]});
return 1;
}
else if (++cnt == 5) return 0;
}
}
return 0;
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n;
vector<array<int, 3>> v;
for (int i = 0; i < n; i++)
{
char ch;
cin >> ch;
v.push_back({ch - '0', i + 1, (i + 1) % n + 1});
}
if (!ok(v)) cout << "NE\n";
else
{
cout << "DA\n";
for (array<int, 3> &x : res) cout << x[0] << ' ' << x[1] << ' ' << x[2] << '\n';
}
}
Compilation message
trobojnica.cpp: In function 'int ok(std::vector<std::array<int, 3> >&)':
trobojnica.cpp:21:3: error: expected ',' or ';' before 'for'
21 | for (int i = 0; i < v.size(); i++)
| ^~~
trobojnica.cpp:21:19: error: 'i' was not declared in this scope
21 | for (int i = 0; i < v.size(); i++)
| ^
trobojnica.cpp:20:7: warning: unused variable 'cnt' [-Wunused-variable]
20 | int cnt = 0
| ^~~
