Submission #988116

#TimeUsernameProblemLanguageResultExecution timeMemory
988116icyalmondSecret (JOI14_secret)C++17
0 / 100
358 ms4788 KiB
#include "secret.h" int n, pref[1005][15], suf[1005][15], a[1005], mask[1005]; void build(int l, int r, int h) { if (l == r) return; int m = l + r >> 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) { if (L == R) return(a[L]); else { int l = 0, r = n - 1, h = 0; while (l < r) { int m = l + r >> 1; if (L <= m && m + 1 <= R) return(Secret(suf[L][h], pref[R][h])); else if (R <= m) { r = m; h++; } else if (m + 1 <= L) { l = m + 1; h++; } } } } //coded by icyalmond

Compilation message (stderr)

secret.cpp: In function 'void build(int, int, int)':
secret.cpp:8:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    8 |     int m = l + r >> 1;
      |             ~~^~~
secret.cpp: In function 'int Query(int, int)':
secret.cpp:37:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |             int m = l + r >> 1;
      |                     ~~^~~
secret.cpp:51:1: warning: control reaches end of non-void function [-Wreturn-type]
   51 | }
      | ^
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