oj.uz

Submission #1105631

# Submission time Handle Problem Language Result Execution time Memory
1105631 2024-10-27T06:35:04 Z Shadow1 Experimental Charges (NOI19_charges) C++17
100 / 100
 45 ms 49736 KB 
// Programmer: Shadow1

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using str = string; // yay python!

#define i64 int64_t
#define show(x) cerr << (#x) << " = " << (x) << '\n';
#define output_vector(v) for(auto &x : v){cout << x << ' ';}cout << '\n';
#define output_pairvector(v) for(auto &x : v){cout << x.first << " " << x.second << '\n';}
#define read_vector(v) for(auto &x : v){cin >> x;}
#define vt vector
#define pq priority_queue
#define pb push_back
#define eb emplace_back
#define pii pair<int,int>
#define umap unordered_map
#define uset unordered_set
#define fir first
#define sec second
#define sz(x) ll(x.size())
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define int ll
#define discretize(x) sort(x.begin(), x.end()); x.erase(unique(x.begin(), x.end()), x.end());
// 
// 

const int INF = 1e18;

const int N = 2000005;
vector<int> p, ranks, opp;

void build() {
    p.assign(N+2, 0);
    ranks.assign(N+2, 0);
    opp.assign(N+2, 0);
    for(int i=1; i<=N; ++i)
        p[i] = i;
}

int find_set(int i) {
    if(p[i] == i)
        return i;
    return p[i] = find_set(p[i]);
}

bool same(int i, int j) {
    return find_set(i) == find_set(j);
}

void unite(int i, int j) {
    if(same(i,j)) return;
    int x = find_set(i), y = find_set(j);
    int k = opp[x];
    if(ranks[x] > y)  // ensure x < y
            swap(x,y);
    p[x] = y;
    if(ranks[x] == ranks[y])
            ++ranks[y];
    opp[y] = k;
}


void solve() {
    int n, q;
    cin >> n >> q;
    vector<int> opp(n+2);
    build();
    while(q--) {
        char t; int a, b;
        cin >> t >> a >> b;
        int oppa = opp[find_set(a)], oppb = opp[find_set(b)];
        if(t == 'A') {
            unite(a + n, b + n);
            if(oppa) 
                unite(oppa, b);
            if(oppb) 
                unite(oppb, a);
            opp[find_set(a)] = b;
            opp[find_set(b)] = a;
        } else if(t == 'R') {
            unite(a + n, b + n);
            if(oppa && oppb) 
                unite(oppa, oppb);
            else {
                if(oppa) oppb = oppa;
                if(oppb) oppa = oppb;
            }
            unite(a, b);
            opp[find_set(a)] = oppa;
            opp[find_set(oppa)] = a;
        } else {
            if(same(a + n, b + n)) {
                if(same(a, b)) 
                    cout << "R" << '\n';
                else 
                    cout << "A" << '\n';
            } else {
                cout << "?" << '\n';
            }
        }
    }
}
    


signed main() {
    // freopen("output.txt", "w", stdout);
    // freopen("input.txt", "r", stdin);
    ios::sync_with_stdio(false);
    cin.tie(NULL); 
    int T = 1;
    // cin >> T;

    while(T--)
        solve();
    return 0;
}

/* CHECK :
1. COMPARATOR FUNCTION MUST RETURN FALSE WHEN ARGUMENTS ARE EQUAL!!!
2. Overflow! Typecase int64_t on operations if varaibles are int
3. Check array bounds!!!
4. Check array indexing!!!
5. Edge cases. (N==1)!!!
*/

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 47184 KB Output is correct
2 Correct 10 ms 47392 KB Output is correct
3 Correct 10 ms 47184 KB Output is correct
4 Correct 9 ms 47324 KB Output is correct
5 Correct 11 ms 47184 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 48960 KB Output is correct
2 Correct 33 ms 48888 KB Output is correct
3 Correct 32 ms 48976 KB Output is correct
4 Correct 31 ms 48988 KB Output is correct
5 Correct 35 ms 48956 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 49480 KB Output is correct
2 Correct 36 ms 49480 KB Output is correct
3 Correct 34 ms 49388 KB Output is correct
4 Correct 36 ms 49460 KB Output is correct
5 Correct 38 ms 49528 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 49736 KB Output is correct
2 Correct 33 ms 49488 KB Output is correct
3 Correct 39 ms 49412 KB Output is correct
4 Correct 40 ms 49500 KB Output is correct
5 Correct 38 ms 49488 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 47184 KB Output is correct
2 Correct 10 ms 47392 KB Output is correct
3 Correct 10 ms 47184 KB Output is correct
4 Correct 9 ms 47324 KB Output is correct
5 Correct 11 ms 47184 KB Output is correct
6 Correct 12 ms 47388 KB Output is correct
7 Correct 11 ms 47440 KB Output is correct
8 Correct 17 ms 47376 KB Output is correct
9 Correct 18 ms 47440 KB Output is correct
10 Correct 17 ms 47412 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 47184 KB Output is correct
2 Correct 10 ms 47392 KB Output is correct
3 Correct 10 ms 47184 KB Output is correct
4 Correct 9 ms 47324 KB Output is correct
5 Correct 11 ms 47184 KB Output is correct
6 Correct 30 ms 48960 KB Output is correct
7 Correct 33 ms 48888 KB Output is correct
8 Correct 32 ms 48976 KB Output is correct
9 Correct 31 ms 48988 KB Output is correct
10 Correct 35 ms 48956 KB Output is correct
11 Correct 33 ms 49480 KB Output is correct
12 Correct 36 ms 49480 KB Output is correct
13 Correct 34 ms 49388 KB Output is correct
14 Correct 36 ms 49460 KB Output is correct
15 Correct 38 ms 49528 KB Output is correct
16 Correct 29 ms 49736 KB Output is correct
17 Correct 33 ms 49488 KB Output is correct
18 Correct 39 ms 49412 KB Output is correct
19 Correct 40 ms 49500 KB Output is correct
20 Correct 38 ms 49488 KB Output is correct
21 Correct 12 ms 47388 KB Output is correct
22 Correct 11 ms 47440 KB Output is correct
23 Correct 17 ms 47376 KB Output is correct
24 Correct 18 ms 47440 KB Output is correct
25 Correct 17 ms 47412 KB Output is correct
26 Correct 34 ms 49396 KB Output is correct
27 Correct 42 ms 49488 KB Output is correct
28 Correct 42 ms 49224 KB Output is correct
29 Correct 41 ms 49224 KB Output is correct
30 Correct 45 ms 49224 KB Output is correct