#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,ssse3,sse3,sse4,popcnt,avx,mmx,abm,tune=native")
#include <bits/stdc++.h>
using namespace std;
const int MN = 2e5+5, LG = 18;
int N, i, j, arr[MN], bit[MN], p[MN]; long long ans, dif[LG];
string sna;
inline void upd(int p,int v){for(;p<=(1<<N);p+=p&-p)bit[p]+=v;}
inline int qu(int p){int r=0;for(;p;p-=p&-p)r+=bit[p]; return r;}
void rec(int l,int r,int b){
if(l^r){
int m = (l+r)>>1;
for(int i=l;i<=m;i++) upd(arr[p[i]],1);
for(int i=m+1;i<=r;i++) dif[b]+=m-l+1-2*qu(arr[p[i]]);
for(int i=l;i<=m;i++) upd(arr[p[i]],-1);
rec(l,m,b-1), rec(m+1,r,b-1);
}
}
inline long long solve(){
memset(dif,0,sizeof(dif));
long long inv = 0;
for(int i=1;i<=(1<<N);i++){
inv += i-1-qu(arr[p[i]]);
upd(arr[p[i]],1);
}
memset(bit,0,sizeof(bit));
rec(1,(1<<N),N-1);
for(int i=0;i<N;i++)
inv -= max(0LL,dif[i]);
return inv;
}
int main(){
scanf("%d",&N);
for(i=1;i<=(1<<N);i++){
scanf("%d",&arr[i]);
p[i]=i; arr[i]++;
}
if(!N) printf("0\n\n");
else{
ans = 1LL<<60;
for(i=0;i<N;i++){
long long cur = solve();
if(cur<ans){
ans = cur;
sna = "";
for(j=0;j<i;j++) sna += '2';
for(j=N-1;j>=0;j--){
if(dif[j]>0) sna += '1';
sna += '2';
}
}
for(j=1;j<=(1<<N);j++){
int lb = (p[j]-1)&1;
p[j] = lb*(1<<(N-1))+((p[j]-1)>>1)+1;
}
}
printf("%lld\n%s\n",ans,sna.c_str());
}
return 0;
}
Compilation message
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/gthr.h:148,
from /usr/include/c++/9/ext/atomicity.h:35,
from /usr/include/c++/9/bits/ios_base.h:39,
from /usr/include/c++/9/ios:42,
from /usr/include/c++/9/istream:38,
from /usr/include/c++/9/sstream:38,
from /usr/include/c++/9/complex:45,
from /usr/include/c++/9/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
from cheerleaders.cpp:4:
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:102:1: error: option("tune=") was already specified
102 | __gthrw(pthread_once)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:102:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:103:1: error: option("tune=") was already specified
103 | __gthrw(pthread_getspecific)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:103:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:104:1: error: option("tune=") was already specified
104 | __gthrw(pthread_setspecific)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:104:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:106:1: error: option("tune=") was already specified
106 | __gthrw(pthread_create)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:106:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:107:1: error: option("tune=") was already specified
107 | __gthrw(pthread_join)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:107:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:108:1: error: option("tune=") was already specified
108 | __gthrw(pthread_equal)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:108:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:109:1: error: option("tune=") was already specified
109 | __gthrw(pthread_self)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:109:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:110:1: error: option("tune=") was already specified
110 | __gthrw(pthread_detach)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:110:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:112:1: error: option("tune=") was already specified
112 | __gthrw(pthread_cancel)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:112:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:114:1: error: option("tune=") was already specified
114 | __gthrw(sched_yield)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:114:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:116:1: error: option("tune=") was already specified
116 | __gthrw(pthread_mutex_lock)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:116:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:117:1: error: option("tune=") was already specified
117 | __gthrw(pthread_mutex_trylock)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:117:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:119:1: error: option("tune=") was already specified
119 | __gthrw(pthread_mutex_timedlock)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:119:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:121:1: error: option("tune=") was already specified
121 | __gthrw(pthread_mutex_unlock)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:121:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:122:1: error: option("tune=") was already specified
122 | __gthrw(pthread_mutex_init)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:122:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:123:1: error: option("tune=") was already specified
123 | __gthrw(pthread_mutex_destroy)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:123:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:125:1: error: option("tune=") was already specified
125 | __gthrw(pthread_cond_init)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:125:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:126:1: error: option("tune=") was already specified
126 | __gthrw(pthread_cond_broadcast)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:126:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:127:1: error: option("tune=") was already specified
127 | __gthrw(pthread_cond_signal)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:127:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:128:1: error: option("tune=") was already specified
128 | __gthrw(pthread_cond_wait)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:128:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:129:1: error: option("tune=") was already specified
129 | __gthrw(pthread_cond_timedwait)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:129:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:130:1: error: option("tune=") was already specified
130 | __gthrw(pthread_cond_destroy)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:130:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:132:1: error: option("tune=") was already specified
132 | __gthrw(pthread_key_create)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:132:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:133:1: error: option("tune=") was already specified
133 | __gthrw(pthread_key_delete)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:133:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:134:1: error: option("tune=") was already specified
134 | __gthrw(pthread_mutexattr_init)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:134:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:135:1: error: option("tune=") was already specified
135 | __gthrw(pthread_mutexattr_settype)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:135:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:136:1: error: option("tune=") was already specified
136 | __gthrw(pthread_mutexattr_destroy)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:136:1: error: option("tune=") was already specified
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:237:1: error: option("tune=") was already specified
237 | __gthrw2(__gthrw_(__pthread_key_create),
| ^~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:237:1: error: option("tune=") was already specified
/usr/include/c++/9/shared_mutex:71:3: error: option("tune=") was already specified
71 | _GLIBCXX_GTHRW(rwlock_rdlock)
| ^~~~~~~~~~~~~~
/usr/include/c++/9/shared_mutex:71:3: error: option("tune=") was already specified
/usr/include/c++/9/shared_mutex:72:3: error: option("tune=") was already specified
72 | _GLIBCXX_GTHRW(rwlock_tryrdlock)
| ^~~~~~~~~~~~~~
/usr/include/c++/9/shared_mutex:72:3: error: option("tune=") was already specified
/usr/include/c++/9/shared_mutex:73:3: error: option("tune=") was already specified
73 | _GLIBCXX_GTHRW(rwlock_wrlock)
| ^~~~~~~~~~~~~~
/usr/include/c++/9/shared_mutex:73:3: error: option("tune=") was already specified
/usr/include/c++/9/shared_mutex:74:3: error: option("tune=") was already specified
74 | _GLIBCXX_GTHRW(rwlock_trywrlock)
| ^~~~~~~~~~~~~~
/usr/include/c++/9/shared_mutex:74:3: error: option("tune=") was already specified
/usr/include/c++/9/shared_mutex:75:3: error: option("tune=") was already specified
75 | _GLIBCXX_GTHRW(rwlock_unlock)
| ^~~~~~~~~~~~~~
/usr/include/c++/9/shared_mutex:75:3: error: option("tune=") was already specified
/usr/include/c++/9/shared_mutex:89:4: error: option("tune=") was already specified
89 | __gthrw(pthread_rwlock_timedrdlock);
| ^~~~~~~
/usr/include/c++/9/shared_mutex:89:4: error: option("tune=") was already specified
/usr/include/c++/9/shared_mutex:99:4: error: option("tune=") was already specified
99 | __gthrw(pthread_rwlock_timedwrlock);
| ^~~~~~~
/usr/include/c++/9/shared_mutex:99:4: error: option("tune=") was already specified
cheerleaders.cpp: In function 'int main()':
cheerleaders.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
39 | scanf("%d",&N);
| ~~~~~^~~~~~~~~
cheerleaders.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
41 | scanf("%d",&arr[i]);
| ~~~~~^~~~~~~~~~~~~~
