| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 17980 | 2016-01-18T05:07:35 Z | suhgyuho_william | Dancing Elephants (IOI11_elephants) | C++ | 0 ms | 0 KB |
#include <stdio.h>
#define Size 390
int n,L;
int bucket[500][1000];
int last[500][1000],picture[500][1000];
int cnt[500];
int a[150002];
// 질문 : 배열 크기를 400*800 으로 할 때는 wrong answer
// 그러나 500*1000은 accept (?)
void setting(int x){
int i,t;
if(cnt[x] == 0) return;
last[x][cnt[x]-1] = bucket[x][cnt[x]-1]+L;
picture[x][cnt[x]-1] = 1;
t = cnt[x]-1;
for(i=cnt[x]-2; i>=0; i--){
while(true){
if(bucket[x][t-1]-bucket[x][i] > L) t--;
else break;
}
if(bucket[x][cnt[x]-1]-bucket[x][i] <= L){
last[x][i] = bucket[x][i]+L;
picture[x][i] = 1;
}else{
last[x][i] = last[x][t];
picture[x][i] = picture[x][t]+1;
}
}
}
int w,t;
void del(int x){
int i;
for(i=0; ; i++){
if(cnt[i] > 0 && bucket[i][cnt[i]-1] >= x) break;
}
w = i;
for(i=0; i<cnt[w]; i++){
if(x == bucket[w][i]) break;
}
t = i;
for(i=t+1; i<cnt[w]; i++){
bucket[w][i-1] = bucket[w][i];
}
cnt[w]--;
setting(w);
}
void add(int x){
int i,sum;
sum = 0;
for(i=0; ; i++){
if(cnt[i] > 0 && bucket[i][cnt[i]-1] > x) break;
sum += cnt[i];
if(sum == n-1) break;
}
w = i;
if(sum == n-1){
bucket[w][cnt[w]] = x;
}else{
for(i=0; i<cnt[w]; i++){
if(bucket[w][i] > x) break;
}
t = i;
for(i=cnt[w]; i>t; i--) bucket[w][i] = bucket[w][i-1];
bucket[w][t] = x;
}
cnt[w]++;
setting(w);
}
int tmp[150002];
void Bucketset(){
int i,j;
int sum,rear;
sum = 0;
rear = -1;
for(i=0; ; i++){
if(cnt[i] == 0) continue;
sum += cnt[i];
for(j=0; j<cnt[i]; j++) tmp[++rear] = bucket[i][j];
cnt[i] = 0;
if(sum == n) break;
}
for(i=0; i<=rear; i++){
bucket[i/Size][i%Size] = tmp[i];
cnt[i/Size]++;
}
for(i=0; i<=(rear/Size); i++) setting(i);
}
int main(void){
int i,j,k,m;
int x,y,sum;
int ans,e;
int left,mid,right;
//freopen("input.txt","r",stdin);
scanf("%d %d %d",&n,&L,&m);
for(i=0; i<n; i++){
scanf("%d",&a[i]);
bucket[i/Size][i%Size] = a[i];
cnt[i/Size]++;
}
for(i=0; i<=(n-1)/Size; i++){
setting(i);
}
for(i=1; i<=m; i++){
scanf("%d %d",&x,&y);
del(a[x]);
add(y);
a[x] = y;
sum = 0;
ans = 0;
e = -1;
for(j=0; ; j++){
if(sum == n) break;
if(cnt[j] == 0) continue;
sum += cnt[j];
if(e < bucket[j][0]){
e = last[j][0];
ans += picture[j][0];
}else if(bucket[j][cnt[j]-1] > e){
left = 0;
right = cnt[j]-1;
while(true){
mid = (left+right)/2;
if(bucket[j][mid] <= e && bucket[j][mid+1] > e) break;
if(bucket[j][mid] > e) right = mid-1;
else left = mid+1;
}
e = last[j][mid+1];
ans += picture[j][mid+1];
}
}
printf("%d\n",ans);
if(i%Size == 0) Bucketset();
}
return 0;
}