oj.uz

Submission #943881

# Submission time Handle Problem Language Result Execution time Memory
943881 2024-03-12T03:30:31 Z sleepntsheep Dancing Elephants (IOI11_elephants) C
100 / 100
 3759 ms 13304 KB 
int hi(int a,int b){return a>b?a:b;}
#include "elephants.h"
#include<assert.h>
#include<stdio.h>
#include<stdlib.h>

#define N 150005
#define S 300
#define NS 550

int n,l,*x,at[N][2];
int *aa[NS],ao[NS];

typedef struct { int a,b; } A;
A *dp[NS];

A merge(A a,A b)
{
    if (a.a==b.a)return a.b>b.b?a:b;
    return a.a<b.a?a:b;
}

void push(int i,int j)
{
    int o=ao[i]++;
    if(!o)aa[i]=(int*)realloc(aa[i],2*sizeof**aa),dp[i]=(A*)realloc(dp[i],sizeof**dp*2);
    else if(o>=2&&(o&o-1)==0)aa[i]=(int*)realloc(aa[i],2*o*sizeof**aa),dp[i]=(A*)realloc(dp[i],2*o*sizeof**dp);
    aa[i][o]=j;
}

void dpize(int i)
{
    for(int j=ao[i]-1,k=ao[i]-1;j>=0;--j)
    {
        while(x[aa[i][k]]-x[aa[i][j]]>l)--k;
        if(k+1==ao[i]) dp[i][j]=(A){1,x[aa[i][j]] + l};
        else dp[i][j]=(A){dp[i][k+1].a+1,dp[i][k+1].b};
    }
    for(int j=0;j<ao[i];++j) at[aa[i][j]][0]=i,at[aa[i][j]][1]=j;
}

int getans()
{
    int z=0,j=-1;
    for(int i=0;i*S<n;++i)
    {
        int zz=-1,ll=0,rr=ao[i]-1;
        while(ll<=rr)
        {
            int mm=(ll+rr)/2;
            if(x[aa[i][mm]]>j)zz=mm,rr=mm-1;
            else ll=mm+1;
        }
        if(~zz) {
            z+=dp[i][zz].a;
            j=dp[i][zz].b;
        }
    }
    return z;
}

void del(int i,int j)
{
    for(int l=j;l+1<ao[i];++l)aa[i][l]=aa[i][l+1];
    --ao[i];
    dpize(i);
}

void ins(int i,int j,int k)
{
    push(i,0);
    for(int l=ao[i]-1;l>j;--l)aa[i][l]=aa[i][l-1];
    aa[i][j]=k;
    dpize(i);
}

int count=0,bb[N];

void build()
{
    for(int i=0;i<n;++i) push(i/S,bb[i]);
    for(int i=0;i*S<n;++i)dpize(i);
}

void rebuild()
{
    for(int bo=0,i=0;i*S<n;ao[i++]=0)
        for(int j=0;j<ao[i];++j)
            bb[bo++]=aa[i][j];

    build();
}

void init(int n_, int l_, int x_[])
{
    x=x_;
    n=n_,l=l_;
    for(int i=0;i<n;++i)bb[i]=i;
    build();
}

int update(int j, int y)
{
    if(++count % S == 0) rebuild();

    del(at[j][0],at[j][1]);
    int nb=-1,np=-1;
    for(int i=0;!~nb&&i*S<n;++i)
        if(ao[i]>0&&x[aa[i][ao[i]-1]] >= y)
            nb=i;
    if(!~nb)nb=(n-1)/S,np=ao[(n-1)/S];

    for(int k=0;!~np&&k<ao[nb];++k)
        if(x[aa[nb][k]]>=y) np=k;

    x[j]=y;
    ins(nb,np,j);

    return getans();
}

Compilation message

elephants.c: In function 'push':
elephants.c:27:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   27 |     else if(o>=2&&(o&o-1)==0)aa[i]=(int*)realloc(aa[i],2*o*sizeof**aa),dp[i]=(A*)realloc(dp[i],2*o*sizeof**dp);
      |                      ~^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8536 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8536 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8536 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 204 ms 9056 KB Output is correct
8 Correct 195 ms 9264 KB Output is correct
9 Correct 311 ms 10072 KB Output is correct
10 Correct 302 ms 10248 KB Output is correct
11 Correct 301 ms 10248 KB Output is correct
12 Correct 494 ms 10248 KB Output is correct
13 Correct 338 ms 10076 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8536 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 204 ms 9056 KB Output is correct
8 Correct 195 ms 9264 KB Output is correct
9 Correct 311 ms 10072 KB Output is correct
10 Correct 302 ms 10248 KB Output is correct
11 Correct 301 ms 10248 KB Output is correct
12 Correct 494 ms 10248 KB Output is correct
13 Correct 338 ms 10076 KB Output is correct
14 Correct 279 ms 9332 KB Output is correct
15 Correct 359 ms 9396 KB Output is correct
16 Correct 865 ms 10248 KB Output is correct
17 Correct 922 ms 10676 KB Output is correct
18 Correct 939 ms 10836 KB Output is correct
19 Correct 556 ms 10904 KB Output is correct
20 Correct 934 ms 11100 KB Output is correct
21 Correct 1068 ms 11140 KB Output is correct
22 Correct 504 ms 10884 KB Output is correct

Subtask #5
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8536 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 204 ms 9056 KB Output is correct
8 Correct 195 ms 9264 KB Output is correct
9 Correct 311 ms 10072 KB Output is correct
10 Correct 302 ms 10248 KB Output is correct
11 Correct 301 ms 10248 KB Output is correct
12 Correct 494 ms 10248 KB Output is correct
13 Correct 338 ms 10076 KB Output is correct
14 Correct 279 ms 9332 KB Output is correct
15 Correct 359 ms 9396 KB Output is correct
16 Correct 865 ms 10248 KB Output is correct
17 Correct 922 ms 10676 KB Output is correct
18 Correct 939 ms 10836 KB Output is correct
19 Correct 556 ms 10904 KB Output is correct
20 Correct 934 ms 11100 KB Output is correct
21 Correct 1068 ms 11140 KB Output is correct
22 Correct 504 ms 10884 KB Output is correct
23 Correct 3073 ms 12804 KB Output is correct
24 Correct 3357 ms 12796 KB Output is correct
25 Correct 2883 ms 12800 KB Output is correct
26 Correct 2945 ms 12800 KB Output is correct
27 Correct 2788 ms 12804 KB Output is correct
28 Correct 724 ms 8788 KB Output is correct
29 Correct 691 ms 8792 KB Output is correct
30 Correct 721 ms 8624 KB Output is correct
31 Correct 691 ms 8620 KB Output is correct
32 Correct 2493 ms 12808 KB Output is correct
33 Correct 2321 ms 12808 KB Output is correct
34 Correct 2342 ms 12808 KB Output is correct
35 Correct 2464 ms 13304 KB Output is correct
36 Correct 2563 ms 12812 KB Output is correct
37 Correct 3116 ms 13116 KB Output is correct
38 Correct 2440 ms 12812 KB Output is correct
39 Correct 2260 ms 12804 KB Output is correct
40 Correct 2332 ms 12892 KB Output is correct
41 Correct 3732 ms 12812 KB Output is correct
42 Correct 3759 ms 12796 KB Output is correct