Submission #852718

#	Time	Username	Problem	Language	Result	Execution time	Memory
852718		sleepntsheep	Secret (JOI14_secret)	C++17	Compilation error	0 ms	0 KiB

secret

#include <vector>
#include "secret.h"
#define N 1050

int n, *a;
std::vector<int> pre[N<<1], suf[N<<1];

void build(int v, int l, int r)
{
    if (l == r)
    {
        pre[v] = suf[v] = {a[l]};
        return;
    }
    int m=(l+r)/2, vl=v+1, vr=v+(m-l+1)*2;
    suf[v].resize(m-l+1);
    suf[v][m-l] = a[m];
    for (int i = m-l-1, j = m - 1; j >= l; --j, --i)
        suf[v][i] = Secret(a[j], suf[v][i+1]);
    pre[v].resize(r-m);
    pre[v][0] = a[m+1];
    for (int i = 1; i < r-m; ++i)
        pre[v][i] = Secret(pre[v][i-1], a[m+1+i]);
    build(vl, l, m);
    build(vr, m+1, r);
}

int qry(int v, int l, int r, int x, int y)
{
    if (l == r) return a[l];
    int m = (l+r)/2, vl=v+1, vr=v+(m-l+1)*2;

    if (y == m) return suf[v][suf[v].size() - 1 - (y - x)];
    if (x == m + 1) return pre[v][y - x];

    if (l <= x && y <= m) return qry(vl, l, m, x, y);
    if (m + 1 <= x && y <= r) return qry(vr, m+1, r, x, y);

    return Secret(qry(vl, l, m, x, y), qry(vr, m+1, r, x, y));
}

void Init(int n_, int *a_)
{
    n = n_, a = a_;
    build(0, 0, n-1);
}

void Query(int l, int r)
{
    return qry(0, 0, n-1, l, r);
}

Compilation message (stderr)

secret.cpp:48:6: error: ambiguating new declaration of 'void Query(int, int)'
   48 | void Query(int l, int r)
      |      ^~~~~
In file included from secret.cpp:2:
secret.h:5:5: note: old declaration 'int Query(int, int)'
    5 | int Query(int L, int R);
      |     ^~~~~
secret.cpp: In function 'void Query(int, int)':
secret.cpp:50:15: error: return-statement with a value, in function returning 'void' [-fpermissive]
   50 |     return qry(0, 0, n-1, l, r);
      |            ~~~^~~~~~~~~~~~~~~~~