제출 #1126108

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1126108		anmattroi	비밀 (JOI14_secret)	C++20	컴파일 에러	0 ms	0 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"

using namespace std;

int n;
int a[1024];
int f[10][1024];

void Init(int N, int A[]) {
    n = N; int oldn = N;
    for (int i = 0; i < n; i++) a[i] = A[i];
    while (__builtin_popcount(n) > 1) a[n++] = 0;

    int sz = __lg(n);
    for (int level = 0; level < sz; level++) {
        for (int block = 0; block < (1<<level); block++) {
            int start = (block<<(sz-level)),
                fin = ((block + 1) << (sz-level));
                middle = (start+fin)>>1;
            if (start >= oldn) break;
            f[level][middle] = a[middle];
            for (int x = middle+1; x < min(fin, oldn); x++) f[level][x] = Secret(f[level][x-1], a[x]);
            f[level][middle-1] = a[middle-1];
            for (int x = middle - 2; x >= start;x--) f[level][x] = Secret(a[x], f[level][x+1]);
        }
    }
}

int Query(int L, int R) {
    if (L == R) return a[L];
    int level = __lg(n)-__lg(L^R)-1;
    return Secret(f[level][L], f[level][R]);
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

secret.cpp: In function 'void Init(int, int*)':
secret.cpp:20:17: error: 'middle' was not declared in this scope
   20 |                 middle = (start+fin)>>1;
      |                 ^~~~~~