Submission #567197

#	Time	Username	Problem	Language	Result	Execution time	Memory
567197		maomao90	Jail (JOI22_jail)	C++17	0 / 100	13 ms	5440 KiB

jail

// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 200005;

int t;
int n;
vi adj[MAXN];
int m;
ii st[MAXN];
int lr[MAXN], rl[MAXN];
int psm[MAXN];

int fw[MAXN];
void incre(int i, int x) {
    for (; i <= n; i += i & -i) fw[i] += x;
}
int qry(int i) {
    int res = 0;
    for (; i > 0; i -= i & -i) res += fw[i];
    return res;
}

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> t;
    while (t--) {
        cin >> n;
        REP (i, 1, n) {
            int a, b; cin >> a >> b;
            adj[a].pb(b);
            adj[b].pb(a);
        }
        cin >> m;
        REP (i, 0, n + 1) {
            lr[i] = 0;
            rl[i] = n + 1;
            fw[i] = 0;
        }
        REP (i, 0, m) {
            cin >> st[i].FI >> st[i].SE;
            if (st[i].FI < st[i].SE) {
                mxto(lr[st[i].FI], st[i].SE);
            } else {
                mnto(rl[st[i].FI], st[i].SE);
            }
        }
        REP (i, 1, n + 1) {
            if (lr[i] != 0) {
                cerr << i << ": " << lr[i] << '\n';
                incre(lr[i], 1);
            }
            if (rl[i] != n + 1) {
                cerr << i << ": " << rl[i] << '\n';
                incre(rl[i], 1);
            }
        }
        bool pos = 1;
        REP (i, 1, n + 1) {
            if (lr[i] != 0) {
                incre(lr[i], -1);
                if (qry(lr[i]) > 0) {
                    pos = 0;
                    break;
                }
            }
            if (rl[i] != n + 1) {
                incre(rl[i], -1);
            }
        }
        if (pos) {
            cout << "Yes\n";
        } else {
            cout << "No\n";
        }
    }
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 16
• Subtask 4: 0 / 28
• Subtask 5: 0 / 12
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23