oj.uz

Submission #653968

# Submission time Handle Problem Language Result Execution time Memory
653968 2022-10-29T05:35:09 Z true22 Experimental Charges (NOI19_charges) C++14
32 / 100
 43 ms 2772 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);
            
            

            if (eof[b] != -1)
                unite(eof[b], a);
            
            eof[a] = b;
            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 2588 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 2692 KB Output is correct
2 Correct 19 ms 2644 KB Output is correct
3 Correct 32 ms 2772 KB Output is correct
4 Correct 23 ms 2644 KB Output is correct
5 Correct 20 ms 2720 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 2772 KB Output is correct
2 Correct 21 ms 2676 KB Output is correct
3 Correct 23 ms 2720 KB Output is correct
4 Correct 22 ms 2644 KB Output is correct
5 Correct 43 ms 2692 KB Output is correct

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 2644 KB Output isn't correct
2 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 2588 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Incorrect 2 ms 2644 KB Output isn't correct
7 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 2588 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 19 ms 2692 KB Output is correct
7 Correct 19 ms 2644 KB Output is correct
8 Correct 32 ms 2772 KB Output is correct
9 Correct 23 ms 2644 KB Output is correct
10 Correct 20 ms 2720 KB Output is correct
11 Correct 20 ms 2772 KB Output is correct
12 Correct 21 ms 2676 KB Output is correct
13 Correct 23 ms 2720 KB Output is correct
14 Correct 22 ms 2644 KB Output is correct
15 Correct 43 ms 2692 KB Output is correct
16 Incorrect 20 ms 2644 KB Output isn't correct
17 Halted 0 ms 0 KB -