제출 #874410

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
874410		sleepntsheep	Growing Trees (BOI11_grow)	C++17	0 / 100	1059 ms	5968 KiB

grow

#include <stdio.h>

#define INLINE inline __attribute__((always_inline))
#define assert_(x) if (!(x)) __builtin_trap()

#define N 200001

unsigned seed = 0x8321798;

INLINE unsigned rand_(void)
{
    return seed = ((seed << 3) ^ 86868686);
}

int A[N], B[N], S[N], L[N], R[N], D[N], AT;

INLINE int treap(int x)
{
    A[++AT] = x; B[AT] = rand_(); S[AT] = 1;
    return AT;
}

INLINE void pull(int v)
{
    S[v] = 1 + S[L[v]] + S[R[v]];
}

INLINE void push(int v)
{
    if (D[v])
    {
        A[v] += D[v];
        if (L[v])
        {
            D[L[v]] += D[v];
            D[R[v]] += D[v];
        }
        D[v] = 0;
    }
}

void split(int v, int *l, int *r, int val)
{
    if (!v) { *l=*r=0; return; }
    push(v);

    if (A[v] <= val)
    {
        split(R[v], R+v, r, val);
        *l = v;
    }
    else
    {
        split(L[v], l, L+v, val);
        *r = v;
    }
    pull(v);
}

void spliti(int v, int *l, int *r, int ind)
{
    if (!v) { *l=*r=0; return; }
    push(v);

    if (S[L[v]] < ind)
    {
        split(R[v], R+v, r, ind - S[L[v]] - 1);
        *l = v;
    }
    else
    {
        split(L[v], l, L+v, ind);
        *r = v;
    }
    pull(v);
}

void merge(int *v, int l, int r)
{
    if (!l || !r) { *v = l^r; return; }

    push(l), push(r);

    if (B[l] < B[r])
    {
        merge(L+r, l, L[r]);
        *v = r;
    }
    else
    {
        merge(R+l, R[l], r);
        *v = l;
    }

    pull(*v);
}

void join(int *v, int l, int r)
{
    if (!l || !r) { *v = l^r; return; }
    if (B[l] < B[r]) { int T = l; l = r; r = T; }

    push(l), push(r);

    int y1, y2;
    split(l, &y1, &y2, A[r]);
    join(R+r, R[r], y2);
    join(L+r, L[r], y1);
    *v = r;
    pull(*v);
}


int order(int v, int k)
{
    if (!v) return 0;

    if (A[v] < k)
        return 1 + S[L[v]] + order(R[v], k);
    return order(L[v], k);
}

int n, q, t;
char op;

void print(int v)
{
    if (!v) return;
    print(L[v]);
    printf("%d ", A[v]);
    print(R[v]);
}

INLINE void fertilize(int s, int h)
{
    int j = order(t, h);
    int y1 = 0, y2 = 0, y3 = 0, y4 = 0;
    spliti(t, &y1, &y2, j);
    spliti(y2, &y3, &y4, s);
    ++D[y3];
    push(y3);
    join(&y2, y3, y4);
    merge(&t, y1, y2);
}

INLINE void query(int x, int y)
{
    printf("%d\n", order(t, y+1) - order(t, x));
}

int main(void)
{
    scanf("%d%d", &n, &q);
    for (int x, i = 0; i < n; ++i) scanf("%d", &x), join(&t, t, treap(x));

    for (int x, y, i = 0; i < q; ++i)
    {
        scanf(" %c%d%d", &op, &x, &y);
        if (op == 'F') fertilize(x, y);
        else query(x, y);
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

grow.cpp: In function 'int main()':
grow.cpp:153:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  153 |     scanf("%d%d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~
grow.cpp:154:41: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  154 |     for (int x, i = 0; i < n; ++i) scanf("%d", &x), join(&t, t, treap(x));
      |                                    ~~~~~^~~~~~~~~~
grow.cpp:158:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  158 |         scanf(" %c%d%d", &op, &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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