This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFOR(i,start,end) for(int i = start; i>end; i--)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define all(a) a.begin(), a.end()
#define mt make_tuple
#define mp make_pair
#define v vector
#define sf scanf
#define pf printf
#define dvar(x) cout << #x << " := " << x << "\n"
#define darr(x,n) FOR(i,0,n) cout << #x << "[" << i << "]" << " := " << x[i] << "\n"
typedef long long ll;
typedef long double ld;
typedef pair<int, int > pii;
typedef pair<ll, ll> pll;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> void minn(T &a, T b) { a = min(a, b); }
template<class T> void maxx(T &a, T b) { a = max(a, b); }
void io() {
#ifdef LOCAL_PROJECT
freopen("input.in", "r", stdin); freopen("output.out", "w", stdout);
#else
/* online submission */
#endif
ios_base::sync_with_stdio(false); cin.tie(NULL);
}
const ll MOD = 1000000007LL;
const ll PRIME = 105943LL;
const ll INF = 1e18;
/*****************************16 COI 1***********************************/
map<string, int> nodes;
v<int> adj[1000];
bool dfs(int x, v<int> &seen, int color) {
if (seen[x] == color) return 1;
if (seen[x] != -1) return 0;
seen[x] = color;
for (int c : adj[x]) if (!dfs(c, seen, color)) return 0;
return 1;
}
bool add(v<string> &data) {
if (nodes.find(data[0]) != nodes.end()) return 0;
v<int> par;
FOR(i, 1, data.size()) {
if (nodes.find(data[i]) == nodes.end()) return 0;
else par.push_back(nodes[data[i]]);
}
sort(all(par)), reverse(all(par));
v<int> seen(nodes.size(), -1);
for (int p : par) {
if (seen[p] != -1) continue;
if (!dfs(p, seen, p)) return 0;
}
int cur = nodes.size();
nodes[data[0]] = cur;
adj[cur] = par;
return 1;
}
v<string> read() {
v<string> ret;
string temp;
cin >> temp;
while (temp != ";") {
if(temp!=":")
ret.push_back(temp);
cin >> temp;
}
return ret;
}
int main() {
io();
int n;
cin >> n;
FOR(i, 0, n) {
v<string> line = read();
if (add(line))
cout << "ok\n";
else
cout << "greska\n";
}
return 0;
}
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