Cod C++:
#include <iostream>
using namespace std;
int n, v[20], a[20][20], gasit = 0;
int solutie(int k) {
if (k == n + 1) return 1;
return 0;
}
void tipar() {
int i;
for (i = 1; i <= n; i++) {
cout << endl;
cout << i << " - > ";
if (v[i] == 1) cout << "verde";
if (v[i] == 2) cout << "albastru";
if (v[i] == 3) cout << "mov";
if (v[i] == 4) cout << "galben";
}
}
void init(int k) {
v[k] = 0;
}
int succesor(int k) {
if (v[k] < 4) {
v[k]++;
return 1;
}
return 0;
}
int valid(int k) {
int i, j;
for (i = 1; i < k; i++) {
if (a[i][k] && v[i] == v[k]) return 0;
}
return 1;
}
void back(int k) {
if (solutie(k)) {
gasit = 1;
tipar();
}
else {
while (succesor(k)) {
if (valid(k) && !gasit) back(k + 1);
}
}
}
int main()
{
int i, x, y;
cout << "Nr tari :\n";
cin >> n;
cout << "Perechi de vecini :\n";
cin >> x >> y;
a[x][y] = 1;
while (x != 0) {
cin >> x >> y;
a[x][y] = 1;
a[y][x] = 1;
}
back(1);
}
