Pagini recente » Cod sursa (job #432446) | Cod sursa (job #869063) | Cod sursa (job #1741883) | Cod sursa (job #2811396) | Cod sursa (job #514727)
Cod sursa(job #514727)
#include <cstdio>
#define file_in "psir.in"
#define file_out "psir.out"
#define nmax (1<<11)
//#define mod (long long)(1<<16)*(long long)(1<<16)
int n,i,j,k,curent;
unsigned ans;
int v[nmax];
unsigned cnt[nmax][nmax];
int main(){
freopen(file_in,"r",stdin);
freopen(file_out,"w",stdout);
scanf("%d", &n);
for (i=0;i<n;++i)
scanf("%d", &v[i]);
for (i=0;i<n;++i){
curent=v[i];
for (j=i+1;j<n;++j){
cnt[i][j]=1;
if (curent<v[j]){
for (k=0;k<i;++k)
if (v[j]<v[k])
cnt[i][j]+=cnt[k][i];
}else{
if (v[j]<curent)
for (k=0;k<i;++k)
if (v[j]>v[k])
cnt[i][j]+=cnt[k][i];
}
ans+=cnt[i][j];
}
}
printf("%u\n", ans);
return 0;
}