Submission #989777

#	Time	Username	Problem	Language	Result	Execution time	Memory
989777		RandomUser	Zamjena (COCI18_zamjena)	C++17	42 / 70	9 ms	1880 KiB

zamjena

#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

struct DSU {
    int n, comp;
    vector<int> par, size;

    void config(int _n) {
        n = _n + 1;
        comp = _n;
        par.resize(n+1);
        size.resize(n+1, 1);
        for(int i=1; i<=n; i++) par[i] = i;
    }

    int get(int u) {
        if(u == par[u]) return u;
        return par[u] = get(par[u]);
    }

    bool uni(int u, int v) {
        u = get(u), v = get(v);

        if(u == v) return false;
        if(size[u] < size[v]) swap(u, v);

        size[u] += size[v];
        par[v] = u;
        comp--;

        return true;
    }

    int getComp() { return comp; }
    int getSize(int u) { return size[get(u)]; }
    bool sameSet(int u, int v) { return get(u) == get(v); }
};

bool isNum(string s) {
    for(char &ch : s)
        if(ch < '0' || ch > '9') return 0;
    return 1;
}

int toNum(string s) {
    int ans=0, c=1;
    while(!s.empty()) {
        char ch = s.back();
        s.pop_back();
        ans += (ch - '0') * c;
        c *= 10;
    }
    return ans;
}

int32_t main() {
    int n, id = 1000;
    cin >> n;

    map<string, int> mp;
    vector<bool> numA(n), numB(n);
    vector<int> a(n), b(n);
    set<int> st;

    for(int i=0; i<n; i++) {
        string s;
        cin >> s;

        if(isNum(s)) {
            a[i] = toNum(s);
            numA[i] = 1;
            st.insert(a[i]);
        } else {
            if(mp.count(s)) a[i] = mp[s];
            else mp[s] = id++, a[i] = mp[s];
        }
    }
   
    for(int i=0; i<n; i++) {
        string s;
        cin >> s;

        if(isNum(s)) {
            b[i] = toNum(s);
            numB[i] = 1;
            st.insert(b[i]);
        } else {
            if(mp.count(s)) b[i] = mp[s];
            else mp[s] = id++, b[i] = mp[s];
        }
    }
    
    for(int i=0; i<n; i++) {
        if(numA[i] && numB[i] && a[i] != b[i]) {
            cout << "NE\n";
            return 0;
        }
    }

    DSU dsu; dsu.config(2050);

    for(int i=0; i<n; i++) {
        if(!numA[i] || !numB[i]) dsu.uni(a[i], b[i]);
    }

    set<int> st2;
    for(auto &x : st) st2.insert(dsu.get(x));

    cout << (st.size() == st2.size() ? "DA" : "NE") << '\n';
    return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14