oj.uz

Submission #653967

# Submission time Handle Problem Language Result Execution time Memory
653967 2022-10-29T05:32:25 Z true22 Experimental Charges (NOI19_charges) C++14
32 / 100
 27 ms 2860 KB 
#include <bits/stdc++.h>
using namespace std;

// short forms // 
#define nl "\n"
#define pb push_back
#define f first
#define s second
#define ll long long int
#define ld long double
#define mp make_pair

#define all(x) x.begin(), x.end()

// debug // 
#define pv(x) for(auto k : x){cout << k << " ";} cout << nl;
#define pp(x) cout << x.f << " " << x.s << nl;
#define bv(x) if (x) cout << "true"; else cout << "false";
#define gp(x, y) x << " " << y 

// loop //
#define FOR(i, a, b) for(ll i = a; i <=b; i++)

// pair // 
typedef pair<ll, ll> pl;

// vector // 
typedef vector<ll> vl;
typedef vector<vl> vvl;    
typedef vector<pl> vp;

// constants // 
const ll INF = 1e17; 
const ll mod = 1e9 + 7;
const ll S = 1e5 + 5;
ll n, siz[S], link[S], eof[S];

ll find(ll a){
    return (a == link[a] ? a : link[a] = find(link[a]));
}

bool unite(ll a, ll b){ // returns the rep of the bigger set

    a = find(a);
    b = find(b);
    if (a == b) return 0;
    // union by size
    if (siz[a] < siz[b]) swap(a, b);   
    siz[a] += siz[b];
    link[b] = a;
    return 1;   
}

void solve(){

    FOR(i, 0, S-1){
        link[i] = i;
        siz[i] = 1;
        eof[i] = -1;
    }    
    
    ll q;
    cin >> n >> q;
    while(q--){
        char t;
        ll a, b;
        cin >> t;
        cin >> a >> b;
        if (t == 'A'){
            // set enemies
            a = find(a);
            b = find(b);
            if (a == b) continue;
            
            if (eof[a] != -1)
                unite(eof[a], b);
            else
                eof[a] = b;

            if (eof[b] != -1)
                unite(eof[b], a);
            else
                eof[b] = a;
        }
        else if (t == 'R'){
            // set friends
            a = find(a);
            b = find(b);
            if (eof[a] == b) 
                continue;
            if (siz[a] < siz[b]) swap(a, b);
            unite(a, b);
            // unite the friends

            // unite the enemies
            if (eof[a] != -1 && eof[b] != -1)
                unite(eof[a], eof[b]);

            if (eof[a] == -1)
                eof[a] = eof[b];
        }
        else{
            // query
            a = find(a);
            b = find(b);
            if (a == b)
                cout << 'R' << nl;
            else if (eof[a] == b || eof[b] == a)
                cout << 'A' << nl;
            else
                cout << '?' << nl;
        }
    }
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);


    ll t = 1;
    //cin >> t;
    while(t--){
        
        solve();
    }
    
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 2684 KB Output is correct
2 Correct 20 ms 2644 KB Output is correct
3 Correct 20 ms 2744 KB Output is correct
4 Correct 24 ms 2704 KB Output is correct
5 Correct 25 ms 2688 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 2680 KB Output is correct
2 Correct 23 ms 2712 KB Output is correct
3 Correct 27 ms 2860 KB Output is correct
4 Correct 23 ms 2644 KB Output is correct
5 Correct 24 ms 2720 KB Output is correct

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 2672 KB Output is correct
2 Correct 23 ms 2672 KB Output is correct
3 Incorrect 24 ms 2672 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Incorrect 2 ms 2644 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 20 ms 2684 KB Output is correct
7 Correct 20 ms 2644 KB Output is correct
8 Correct 20 ms 2744 KB Output is correct
9 Correct 24 ms 2704 KB Output is correct
10 Correct 25 ms 2688 KB Output is correct
11 Correct 22 ms 2680 KB Output is correct
12 Correct 23 ms 2712 KB Output is correct
13 Correct 27 ms 2860 KB Output is correct
14 Correct 23 ms 2644 KB Output is correct
15 Correct 24 ms 2720 KB Output is correct
16 Correct 21 ms 2672 KB Output is correct
17 Correct 23 ms 2672 KB Output is correct
18 Incorrect 24 ms 2672 KB Output isn't correct
19 Halted 0 ms 0 KB -