Submission #568063

#	Time	Username	Problem	Language	Result	Execution time	Memory
568063		abc864197532	조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2)	C++17	0 / 100	1 ms	340 KiB

joitter2

#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pii pair <int, int>
#define X first
#define Y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
void abc() {cout << endl;}
template <typename T, typename ...U> void abc(T a, U ...b) {
    cout << a << ' ', abc(b...);
}
template <typename T> void printv(T l, T r) {
    for (; l != r; ++l) cout << *l << " \n"[l + 1 == r];
}
template <typename A, typename B> istream& operator >> (istream& o, pair<A, B> &a) {
    return o >> a.X >> a.Y;
}
template <typename A, typename B> ostream& operator << (ostream& o, pair<A, B> a) {
    return o << '(' << a.X << ", " << a.Y << ')';
}
template <typename T> ostream& operator << (ostream& o, vector<T> a) {
    bool is = false;
    if (a.empty()) return o << "{}";
    for (T i : a) {o << (is ? ' ' : '{'), is = true, o << i;}
    return o << '}';
}
template <typename T> struct vv : vector <vector <T>> {
    vv(int n, int m, T v) : vector <vector <T>> (n, vector <T>(m, v)) {}
    vv() {}
};
template <typename T> struct vvv : vector <vv <T>> {
    vvv(int n, int m, int k, T v) : vector <vv <T>> (n, vv <T>(m, k, v)) {}
    vvv() {}
};
#ifdef Doludu
#define test(args...) abc("[" + string(#args) + "]", args)
#define owo freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout); 
#else
#define test(args...) void(0)
#define owo ios::sync_with_stdio(false); cin.tie(0)
#endif
const int mod = 1e9 + 7, N = 2000, logN = 20, K = 48763;

bool edge[N][N];
int ans = 0;

int main () {
    owo;
    int n, q;
    cin >> n >> q;
    while (q--) {
        int u, v;
        cin >> u >> v, --u, --v;
        if (!edge[u][v]) {
            edge[u][v] = true, ans++;
            for (int x = 0; x < n; ++x) if (u != x && v != x) {
                if (edge[v][x] && edge[x][v] && !edge[u][x])
                    edge[u][x] = true, ans++;
                if (edge[v][u] && !edge[x][u] && edge[x][v])
                    edge[x][u] = true, ans++; 
                if (edge[v][u] && edge[x][u] && !edge[x][v])
                    edge[x][v] = true, ans++; 
            }
        }
        cout << ans << '\n';
    }
}

• Subtask 1: 0 / 1
• Subtask 2: 0 / 16
• Subtask 3: 0 / 83