oj.uz

Submission #333067

# Submission time Handle Problem Language Result Execution time Memory
333067 2020-12-04T11:53:12 Z banterbry Experimental Charges (NOI19_charges) C++17
100 / 100
 36 ms 4076 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
typedef pair<int,int> pi;

#ifdef LOCAL
#define debug(...) __f(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) 69
#endif
template <typename Arg>
void __f(string name, Arg arg) {
	cerr << name << " = " << arg << endl;
}
template <typename Head, typename... Tail>
void __f(string names, Head head, Tail... tail) {
	string cur = "";
	for (auto ch: names){if(ch==','){break;}else{cur+=ch;}}
	string nxt = names.substr(cur.size()+2);
	cerr << cur << " = " << head << ", ";
	__f(nxt, tail...);
}

const int mxn = 1e5 + 5;
int n, q, sz[mxn];
pi par[mxn];

pi root(int x) {
    if (par[x].first == x) return pi(x, 0);
    pi ct = root(par[x].first);
    return par[x] = pi(ct.first, ct.second ^ par[x].second);
}
bool same(int x, int y) {return root(x) == root(y);}
void unite(int x, int y, int charge) {
    pi xx = root(x), yy = root(y);
   	int a = xx.first, b = yy.first;
   	if (a == b) return;
   	if (sz[a] < sz[b]) swap(a, b);
   	sz[a] += sz[b];
   	par[b].first = a;
   	par[b].second = xx.second ^ yy.second ^ charge;
}

int32_t main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> n >> q;
	for (int i = 1; i <= n; ++i) par[i] = pi(i, 1), sz[i] = 1;
	while (q--) {
		char op; int a, b;
		cin >> op >> a >> b;
		if (op == 'Q') {
			pi aa = root(a);
			pi bb = root(b);
			if (aa.first != bb.first) cout << "?\n";
			else if (aa.second == bb.second) cout << "R\n";
			else cout << "A\n";
		} else {
			if (op == 'A') unite(a, b, 1);
			else unite(a, b, 0);
		}
	}
	return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 3436 KB Output is correct
2 Correct 24 ms 3564 KB Output is correct
3 Correct 29 ms 3564 KB Output is correct
4 Correct 36 ms 3564 KB Output is correct
5 Correct 30 ms 3692 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 3180 KB Output is correct
2 Correct 28 ms 3180 KB Output is correct
3 Correct 31 ms 3052 KB Output is correct
4 Correct 31 ms 3052 KB Output is correct
5 Correct 31 ms 3180 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 3564 KB Output is correct
2 Correct 28 ms 3948 KB Output is correct
3 Correct 35 ms 3820 KB Output is correct
4 Correct 29 ms 4076 KB Output is correct
5 Correct 30 ms 3948 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 27 ms 3436 KB Output is correct
7 Correct 24 ms 3564 KB Output is correct
8 Correct 29 ms 3564 KB Output is correct
9 Correct 36 ms 3564 KB Output is correct
10 Correct 30 ms 3692 KB Output is correct
11 Correct 26 ms 3180 KB Output is correct
12 Correct 28 ms 3180 KB Output is correct
13 Correct 31 ms 3052 KB Output is correct
14 Correct 31 ms 3052 KB Output is correct
15 Correct 31 ms 3180 KB Output is correct
16 Correct 27 ms 3564 KB Output is correct
17 Correct 28 ms 3948 KB Output is correct
18 Correct 35 ms 3820 KB Output is correct
19 Correct 29 ms 4076 KB Output is correct
20 Correct 30 ms 3948 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 26 ms 4076 KB Output is correct
27 Correct 28 ms 4076 KB Output is correct
28 Correct 27 ms 3820 KB Output is correct
29 Correct 27 ms 3820 KB Output is correct
30 Correct 29 ms 3820 KB Output is correct