oj.uz

Submission #635434

# Submission time Handle Problem Language Result Execution time Memory
635434 2022-08-26T09:05:30 Z ghostwriter Naboj (COCI22_naboj) C++14
40 / 110
 273 ms 48988 KB 
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#endif
#define st first
#define nd second
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
    Tran The Bao
    CTL - Da Lat
    Cay ngay cay dem nhung deo duoc cong nhan
*/
const int M = 5e5 + 5;
const int N = 2e5 + 5;
int n, m, c[N], c1[N], cnt0[N], cnt1[N], cnt = 0;
vi adj0[N], adj1[N];
pi e[M];
multiset<int> s;
vpi ans;
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    cin >> n >> m;
    WHILE(m--) {
    	int a, b;
    	cin >> a >> b;
    	e[++cnt] = {a, b};
    	adj1[a].pb(cnt);
    	adj0[b].pb(cnt);
    }
    FOR(i, 1, n) {
    	cnt0[i] = sz(adj0[i]);
    	cnt1[i] = sz(adj1[i]);
    	if (!cnt0[i] || !cnt1[i]) {
    		s.insert(i);
    		c[i] = 1;
    	}
    }
    WHILE(!s.empty()) {
    	int u = *s.begin();
    	ans.pb({u, cnt1[u]? 1 : 0});
    	s.erase(s.begin());
    	c[u] = 1;
    	EACH(i, adj0[u]) {
    		if (c1[i]) continue;
    		int v = e[i].st;
    		--cnt1[v];
    		if (!c[v] && !cnt1[v]) {
    			 s.insert(v);
    			 c[v] = 1;
			}
    		c1[i] = 1;
    	}
    	EACH(i, adj1[u]) {
    		if (c1[i]) continue;
    		int v = e[i].nd;
    		--cnt0[v];
    		if (!c[v] && !cnt0[v]) {
    			 s.insert(v);
    			 c[v] = 1;
			}
    		c1[i] = 1;
    	}
    }
    reverse(all(ans));
    if (sz(ans) < n) {
    	cout << -1;
    	return 0;
    }
    cout << n << '\n';
    FOR(i, 0, n - 1) cout << ans[i].st << ' ' << ans[i].nd << '\n';
    return 0;
}
/*
5 10
2 4
3 4
1 4
4 5
3 2
2 1
5 2
1 3
5 3
1 5
*/

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
naboj.cpp:55:5: note: in expansion of macro 'FOR'
   55 |     FOR(i, 1, n) {
      |     ^~~
naboj.cpp:26:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   26 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
naboj.cpp:68:6: note: in expansion of macro 'EACH'
   68 |      EACH(i, adj0[u]) {
      |      ^~~~
naboj.cpp:26:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   26 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
naboj.cpp:78:6: note: in expansion of macro 'EACH'
   78 |      EACH(i, adj1[u]) {
      |      ^~~~
naboj.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
naboj.cpp:95:5: note: in expansion of macro 'FOR'
   95 |     FOR(i, 0, n - 1) cout << ans[i].st << ' ' << ans[i].nd << '\n';
      |     ^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 5 ms 9672 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 5 ms 9684 KB Output is correct
13 Correct 6 ms 9684 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 248 ms 32488 KB Output is correct
2 Correct 232 ms 32424 KB Output is correct
3 Correct 116 ms 21720 KB Output is correct
4 Correct 227 ms 32468 KB Output is correct
5 Correct 261 ms 32488 KB Output is correct
6 Correct 240 ms 32580 KB Output is correct
7 Correct 273 ms 32404 KB Output is correct
8 Correct 178 ms 27392 KB Output is correct
9 Correct 266 ms 32412 KB Output is correct
10 Correct 256 ms 32444 KB Output is correct

Subtask #3
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 5 ms 9672 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 5 ms 9684 KB Output is correct
13 Correct 6 ms 9684 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 248 ms 32488 KB Output is correct
16 Correct 232 ms 32424 KB Output is correct
17 Correct 116 ms 21720 KB Output is correct
18 Correct 227 ms 32468 KB Output is correct
19 Correct 261 ms 32488 KB Output is correct
20 Correct 240 ms 32580 KB Output is correct
21 Correct 273 ms 32404 KB Output is correct
22 Correct 178 ms 27392 KB Output is correct
23 Correct 266 ms 32412 KB Output is correct
24 Correct 256 ms 32444 KB Output is correct
25 Runtime error 211 ms 48988 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -