Submission #365512

#TimeUsernameProblemLanguageResultExecution timeMemory
365512jasen_penchevTrampoline (info1cup20_trampoline)C++14
0 / 100
333 ms47340 KiB
#include <algorithm> #include <iostream> #define endl '\n' using namespace std; const int MAXN = 200000; const int LOG = 20; struct trampoline { int x, y; }; trampoline a[MAXN + 5]; int Next[MAXN + 5][LOG + 5]; bool cmp(trampoline a, trampoline b) { if (a.x != b.x) return a.x < b.x; return a.y < b.y; } int main() { ios :: sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); int R, C, N; cin >> R >> C >> N; for (int i = 1; i <= N; ++ i) { cin >> a[i].x >> a[i].y; } sort(a + 1, a + N + 1, cmp); for (int i = 1; i <= N; ++ i) { int l = i, r = N + 1, mid; while (l < r - 1) { mid = (l + r) / 2; if (a[i].x == a[mid].x or (a[i].x + 1 == a[mid].x and a[i].y > a[mid].y)) l = mid; else r = mid; } if (r == N + 1 or a[i].x + 1 != a[mid].x) Next[i][0] = -1; else Next[i][0] = r; } for (int j = 1; j <= LOG; ++ j) { for (int i = 1; i <= N; ++ i) { Next[i][j] = Next[Next[i][j - 1]][j - 1]; } } int T; cin >> T; for (int i = 1; i <= T; ++ i) { int x_start, y_start, x_stop, y_stop; cin >> x_start >> y_start >> x_stop >> y_stop; if (x_start > x_stop or (x_start == x_stop and y_start > y_stop)) { cout << "No" << endl; continue; } if (x_start == x_stop) { cout << "Yes" << endl; continue; } trampoline curr; curr.x = x_start; curr.y = y_start; int l = 0, r = N + 1, mid; while (l < r - 1) { mid = (l + r) / 2; if (cmp(curr, a[mid]) or (curr.x == a[mid].x and curr.y == a[mid].y)) r = mid; else l = mid; } if (r == N + 1 or a[r].x > x_start) { cout << "No" << endl; continue; } int t = r; x_start = a[r].x; y_start = a[r].y; for (int j = LOG; j >= 0; -- j) { if (x_start + (1ll << j) < x_stop) { t = Next[t][j]; if (t == -1) break; x_start = a[t].x; y_start = a[t].y; } } if (t == -1 or y_start > y_stop) cout << "No" << endl; else cout << "Yes" << endl; } return 0; }
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