Submission #988098

#TimeUsernameProblemLanguageResultExecution timeMemory
988098icyalmondSecret (JOI14_secret)C++17
0 / 100
371 ms12204 KiB
#include "secret.h" int n, pref[1005][15], suf[1005][15], a[1005], mask[1005]; void build(int l, int r, int h) { int m = l + 1 >> 1; suf[m][h] = a[m]; for (int i = m - 1; i >= l; i--) suf[i][h] = Secret(suf[i + 1][h], a[i]); pref[m + 1][h] = a[m + 1]; for (int i = m + 2; i <= r; i++) pref[i][h] = Secret(pref[i - 1][h], a[i]); for (int i = m + 1; i <= r; i++) mask[i] |= 1 << h; if (l != m) build(l, m, h + 1); if (m + 1 != r) build(m + 1, r, h + 1); } void Init(int N, int A[]) { n = N; for (int i = 0; i < n; i++) { a[i] = A[i]; mask[i] = 0; } build(0, n - 1, 0); } int Query(int L, int R) { int a = 0, b = n - 1, h = 0; while (a != b) { int mid = (a + b) / 2; if (mid >= L && mid < R) return Secret(suf[L][h], pref[R][h]); else if (mid == R) return suf[L][h]; else if (mid < L) a = mid + 1; else b = mid; h++; } return suf[a][h]; } //coded by icyalmond

Compilation message (stderr)

secret.cpp: In function 'void build(int, int, int)':
secret.cpp:7:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    7 |     int m = l + 1 >> 1;
      |             ~~^~~
#Verdict Execution timeMemoryGrader output
Fetching results...