結果
| 問題 |
No.1604 Swap Sort:ONE
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-07-17 13:28:25 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 3 ms / 2,000 ms |
| コード長 | 5,684 bytes |
| コンパイル時間 | 1,790 ms |
| コンパイル使用メモリ | 179,216 KB |
| 実行使用メモリ | 7,620 KB |
| 最終ジャッジ日時 | 2024-07-07 01:15:15 |
| 合計ジャッジ時間 | 2,598 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 24 |
ソースコード
#pragma GCC optimize ("Ofast")
#include<bits/stdc++.h>
using namespace std;
template<class T> struct cLtraits_identity{
using type = T;
}
;
template<class T> using cLtraits_try_make_signed =
typename conditional<
is_integral<T>::value,
make_signed<T>,
cLtraits_identity<T>
>::type;
template <class S, class T> struct cLtraits_common_type{
using tS = typename cLtraits_try_make_signed<S>::type;
using tT = typename cLtraits_try_make_signed<T>::type;
using type = typename common_type<tS,tT>::type;
}
;
void*wmem;
char memarr[96000000];
template<class S, class T> inline auto min_L(S a, T b)
-> typename cLtraits_common_type<S,T>::type{
return (typename cLtraits_common_type<S,T>::type) a <= (typename cLtraits_common_type<S,T>::type) b ? a : b;
}
template<class T> inline void walloc1d(T **arr, int x, void **mem = &wmem){
static int skip[16] = {0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
(*mem) = (void*)( ((char*)(*mem)) + skip[((unsigned long long)(*mem)) & 15] );
(*arr)=(T*)(*mem);
(*mem)=((*arr)+x);
}
template<class T> inline void walloc1d(T **arr, int x1, int x2, void **mem = &wmem){
walloc1d(arr, x2-x1, mem);
(*arr) -= x1;
}
inline int my_getchar(){
static char buf[1048576];
static int s = 1048576;
static int e = 1048576;
if(s == e && e == 1048576){
e = fread(buf, 1, 1048576, stdin);
s = 0;
}
if(s == e){
return EOF;
}
return buf[s++];
}
inline void rd(int &x){
int k;
int m=0;
x=0;
for(;;){
k = my_getchar();
if(k=='-'){
m=1;
break;
}
if('0'<=k&&k<='9'){
x=k-'0';
break;
}
}
for(;;){
k = my_getchar();
if(k<'0'||k>'9'){
break;
}
x=x*10+k-'0';
}
if(m){
x=-x;
}
}
struct MY_WRITER{
char buf[1048576];
int s;
int e;
MY_WRITER(){
s = 0;
e = 1048576;
}
~MY_WRITER(){
if(s){
fwrite(buf, 1, s, stdout);
}
}
}
;
MY_WRITER MY_WRITER_VAR;
void my_putchar(int a){
if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){
fwrite(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout);
MY_WRITER_VAR.s = 0;
}
MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a;
}
inline void wt_L(char a){
my_putchar(a);
}
inline void wt_L(int x){
int s=0;
int m=0;
char f[10];
if(x<0){
m=1;
x=-x;
}
while(x){
f[s++]=x%10;
x/=10;
}
if(!s){
f[s++]=0;
}
if(m){
my_putchar('-');
}
while(s--){
my_putchar(f[s]+'0');
}
}
inline void wt_L(unsigned x){
int s=0;
char f[10];
while(x){
f[s++]=x%10;
x/=10;
}
if(!s){
f[s++]=0;
}
while(s--){
my_putchar(f[s]+'0');
}
}
inline void wt_L(long long x){
int s=0;
int m=0;
char f[20];
if(x<0){
m=1;
x=-x;
}
while(x){
f[s++]=x%10;
x/=10;
}
if(!s){
f[s++]=0;
}
if(m){
my_putchar('-');
}
while(s--){
my_putchar(f[s]+'0');
}
}
inline void wt_L(unsigned long long x){
int s=0;
char f[21];
while(x){
f[s++]=x%10;
x/=10;
}
if(!s){
f[s++]=0;
}
while(s--){
my_putchar(f[s]+'0');
}
}
int WRITER_DOUBLE_DIGIT = 15;
inline int writerDigit_double(){
return WRITER_DOUBLE_DIGIT;
}
inline void writerDigit_double(int d){
WRITER_DOUBLE_DIGIT = d;
}
inline void wt_L(double x){
const int d = WRITER_DOUBLE_DIGIT;
int k;
int r;
double v;
if(x!=x || (x==x+1 && x==2*x)){
my_putchar('E');
my_putchar('r');
my_putchar('r');
return;
}
if(x < 0){
my_putchar('-');
x = -x;
}
x += 0.5 * pow(0.1, d);
r = 0;
v = 1;
while(x >= 10*v){
v *= 10;
r++;
}
while(r >= 0){
r--;
k = floor(x / v);
if(k >= 10){
k = 9;
}
if(k <= -1){
k = 0;
}
x -= k * v;
v *= 0.1;
my_putchar(k + '0');
}
if(d > 0){
my_putchar('.');
v = 1;
for(r=(0);r<(d);r++){
v *= 0.1;
k = floor(x / v);
if(k >= 10){
k = 9;
}
if(k <= -1){
k = 0;
}
x -= k * v;
my_putchar(k + '0');
}
}
}
inline void wt_L(const char c[]){
int i=0;
for(i=0;c[i]!='\0';i++){
my_putchar(c[i]);
}
}
inline void wt_L(string &x){
int i=0;
for(i=0;x[i]!='\0';i++){
my_putchar(x[i]);
}
}
template<class T> long long inversion(int N, T A[], void *mem=wmem){
int i;
int j;
int k;
int p;
int n1;
int n2;
T*x;
T*y;
long long res = 0;
walloc1d(&x, N, &mem);
walloc1d(&y, N, &mem);
for(i=(0);i<(N);i++){
x[i] = A[i];
}
for(k=0;k<N;k+=4){
n1 =min_L(4, N-k);
for(j=n1;j;j--){
int mh1PDLat = j;
for(i=(1);i<(mh1PDLat);i++){
if(x[k+i-1] > x[k+i]){
swap(x[k+i-1], x[k+i]);
res++;
}
}
}
}
p = 4;
while(p<N){
for(k=0;k<N;k+=2*p){
n1 =min_L(p, N-k);
n2 =min_L(p, N-k-n1);
i = j = 0;
while(i<n1 && j<n2){
if(x[k+i] <= x[k+n1+j]){
y[k+i+j] = x[k+i];
i++;
}
else{
y[k+i+j] = x[k+n1+j];
res += n1-i;
j++;
}
}
while(i<n1){
y[k+i+j] = x[k+i];
i++;
}
while(j<n2){
y[k+i+j] = x[k+n1+j];
j++;
}
}
swap(x,y);
p *= 2;
}
return res;
}
int n;
int p[3110];
int r[3110];
int main(){
int i;
wmem = memarr;
rd(n);
{
int PiIOrLma;
for(PiIOrLma=(0);PiIOrLma<(n);PiIOrLma++){
rd(p[PiIOrLma]);p[PiIOrLma] += (-1);
}
}
for(i=(0);i<(n);i++){
r[p[i]] = i;
}
wt_L(inversion(n, r));
wt_L('\n');
return 0;
}
// cLay version 20210405-1
// --- original code ---
// //no-unlocked
// int n, p[3110], r[];
// {
// rd(n, (p--)(n));
// rep(i, n) r[p[i]] = i;
// wt(inversion(n, r));
// }