#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> pii;
const LL MAXN=300005;
LL a[MAXN],bit[2][MAXN],MAX;
void update(LL now,LL val,LL no){
for(LL i=now;i<=MAX;i+=(i&(-i)))bit[no][i]+=val;
}
LL query(LL now,LL no){
LL ret=0;
if(now==0)return ret;
for(LL i=now;i>0;i-=(i&(-i)))ret+=bit[no][i];
return ret;
}
int main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
LL n;
cin >> n;
vector<pii> v;
for(LL i=1;i<=n;i++){
cin >> a[i];
v.push_back({a[i],i});
}
sort(v.begin(),v.end());
for(LL i=0;i<v.size();i++){
if(i==0 || v[i].first!=v[i-1].first)MAX++;
a[v[i].second]=MAX;
}
for(LL i=1;i<=n;i++)update(a[i],1,1);
LL ans=0;
for(LL i=1;i<=n;i++){
update(a[i],-1,1);
ans+=query(a[i]-1,0)*query(a[i]-1,1);
update(a[i],1,0);
}
cout << ans << '\n';
return 0;
}
Compilation message
Mountains.cpp: In function 'int main()':
Mountains.cpp:30:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(LL i=0;i<v.size();i++){
~^~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
384 KB |
Output is correct |
| 2 |
Correct |
96 ms |
17752 KB |
Output is correct |
| 3 |
Correct |
103 ms |
17748 KB |
Output is correct |
| 4 |
Correct |
105 ms |
17748 KB |
Output is correct |
| 5 |
Correct |
101 ms |
17752 KB |
Output is correct |
| 6 |
Correct |
100 ms |
17872 KB |
Output is correct |
| 7 |
Correct |
108 ms |
17880 KB |
Output is correct |
| 8 |
Correct |
101 ms |
17748 KB |
Output is correct |
| 9 |
Correct |
104 ms |
15840 KB |
Output is correct |
| 10 |
Correct |
97 ms |
15840 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
53 ms |
11376 KB |
Output is correct |
| 2 |
Correct |
62 ms |
11376 KB |
Output is correct |
| 3 |
Correct |
60 ms |
11376 KB |
Output is correct |
| 4 |
Correct |
57 ms |
11368 KB |
Output is correct |
| 5 |
Correct |
58 ms |
11376 KB |
Output is correct |
| 6 |
Correct |
55 ms |
11368 KB |
Output is correct |
| 7 |
Correct |
56 ms |
11368 KB |
Output is correct |
| 8 |
Correct |
35 ms |
11376 KB |
Output is correct |
| 9 |
Correct |
40 ms |
11364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
53 ms |
11376 KB |
Output is correct |
| 2 |
Correct |
62 ms |
11376 KB |
Output is correct |
| 3 |
Correct |
60 ms |
11376 KB |
Output is correct |
| 4 |
Correct |
57 ms |
11368 KB |
Output is correct |
| 5 |
Correct |
58 ms |
11376 KB |
Output is correct |
| 6 |
Correct |
55 ms |
11368 KB |
Output is correct |
| 7 |
Correct |
56 ms |
11368 KB |
Output is correct |
| 8 |
Correct |
35 ms |
11376 KB |
Output is correct |
| 9 |
Correct |
40 ms |
11364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
384 KB |
Output is correct |
| 11 |
Correct |
73 ms |
11620 KB |
Output is correct |
| 12 |
Correct |
71 ms |
11632 KB |
Output is correct |
| 13 |
Correct |
76 ms |
11624 KB |
Output is correct |
| 14 |
Correct |
70 ms |
11624 KB |
Output is correct |
| 15 |
Correct |
72 ms |
11620 KB |
Output is correct |
| 16 |
Correct |
72 ms |
11624 KB |
Output is correct |
| 17 |
Correct |
70 ms |
11632 KB |
Output is correct |
| 18 |
Correct |
40 ms |
11632 KB |
Output is correct |
| 19 |
Correct |
43 ms |
11624 KB |
Output is correct |
| 20 |
Correct |
0 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
0 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
384 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
0 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
384 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
384 KB |
Output is correct |
| 11 |
Correct |
6 ms |
1016 KB |
Output is correct |
| 12 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 13 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 14 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 15 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 16 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 18 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 19 |
Correct |
3 ms |
896 KB |
Output is correct |
| 20 |
Correct |
0 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
53 ms |
11376 KB |
Output is correct |
| 2 |
Correct |
62 ms |
11376 KB |
Output is correct |
| 3 |
Correct |
60 ms |
11376 KB |
Output is correct |
| 4 |
Correct |
57 ms |
11368 KB |
Output is correct |
| 5 |
Correct |
58 ms |
11376 KB |
Output is correct |
| 6 |
Correct |
55 ms |
11368 KB |
Output is correct |
| 7 |
Correct |
56 ms |
11368 KB |
Output is correct |
| 8 |
Correct |
35 ms |
11376 KB |
Output is correct |
| 9 |
Correct |
40 ms |
11364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
384 KB |
Output is correct |
| 11 |
Correct |
73 ms |
11620 KB |
Output is correct |
| 12 |
Correct |
71 ms |
11632 KB |
Output is correct |
| 13 |
Correct |
76 ms |
11624 KB |
Output is correct |
| 14 |
Correct |
70 ms |
11624 KB |
Output is correct |
| 15 |
Correct |
72 ms |
11620 KB |
Output is correct |
| 16 |
Correct |
72 ms |
11624 KB |
Output is correct |
| 17 |
Correct |
70 ms |
11632 KB |
Output is correct |
| 18 |
Correct |
40 ms |
11632 KB |
Output is correct |
| 19 |
Correct |
43 ms |
11624 KB |
Output is correct |
| 20 |
Correct |
0 ms |
384 KB |
Output is correct |
| 21 |
Correct |
94 ms |
12400 KB |
Output is correct |
| 22 |
Correct |
104 ms |
12516 KB |
Output is correct |
| 23 |
Correct |
100 ms |
12388 KB |
Output is correct |
| 24 |
Correct |
96 ms |
12400 KB |
Output is correct |
| 25 |
Correct |
99 ms |
12388 KB |
Output is correct |
| 26 |
Correct |
99 ms |
12384 KB |
Output is correct |
| 27 |
Correct |
101 ms |
12388 KB |
Output is correct |
| 28 |
Correct |
68 ms |
12388 KB |
Output is correct |
| 29 |
Correct |
64 ms |
12388 KB |
Output is correct |
| 30 |
Correct |
0 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
384 KB |
Output is correct |
| 2 |
Correct |
96 ms |
17752 KB |
Output is correct |
| 3 |
Correct |
103 ms |
17748 KB |
Output is correct |
| 4 |
Correct |
105 ms |
17748 KB |
Output is correct |
| 5 |
Correct |
101 ms |
17752 KB |
Output is correct |
| 6 |
Correct |
100 ms |
17872 KB |
Output is correct |
| 7 |
Correct |
108 ms |
17880 KB |
Output is correct |
| 8 |
Correct |
101 ms |
17748 KB |
Output is correct |
| 9 |
Correct |
104 ms |
15840 KB |
Output is correct |
| 10 |
Correct |
97 ms |
15840 KB |
Output is correct |
| 11 |
Correct |
53 ms |
11376 KB |
Output is correct |
| 12 |
Correct |
62 ms |
11376 KB |
Output is correct |
| 13 |
Correct |
60 ms |
11376 KB |
Output is correct |
| 14 |
Correct |
57 ms |
11368 KB |
Output is correct |
| 15 |
Correct |
58 ms |
11376 KB |
Output is correct |
| 16 |
Correct |
55 ms |
11368 KB |
Output is correct |
| 17 |
Correct |
56 ms |
11368 KB |
Output is correct |
| 18 |
Correct |
35 ms |
11376 KB |
Output is correct |
| 19 |
Correct |
40 ms |
11364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
73 ms |
11620 KB |
Output is correct |
| 22 |
Correct |
71 ms |
11632 KB |
Output is correct |
| 23 |
Correct |
76 ms |
11624 KB |
Output is correct |
| 24 |
Correct |
70 ms |
11624 KB |
Output is correct |
| 25 |
Correct |
72 ms |
11620 KB |
Output is correct |
| 26 |
Correct |
72 ms |
11624 KB |
Output is correct |
| 27 |
Correct |
70 ms |
11632 KB |
Output is correct |
| 28 |
Correct |
40 ms |
11632 KB |
Output is correct |
| 29 |
Correct |
43 ms |
11624 KB |
Output is correct |
| 30 |
Correct |
0 ms |
384 KB |
Output is correct |
| 31 |
Correct |
1 ms |
384 KB |
Output is correct |
| 32 |
Correct |
1 ms |
384 KB |
Output is correct |
| 33 |
Correct |
1 ms |
384 KB |
Output is correct |
| 34 |
Correct |
1 ms |
384 KB |
Output is correct |
| 35 |
Correct |
0 ms |
384 KB |
Output is correct |
| 36 |
Correct |
1 ms |
384 KB |
Output is correct |
| 37 |
Correct |
1 ms |
384 KB |
Output is correct |
| 38 |
Correct |
1 ms |
384 KB |
Output is correct |
| 39 |
Correct |
1 ms |
384 KB |
Output is correct |
| 40 |
Correct |
0 ms |
384 KB |
Output is correct |
| 41 |
Correct |
6 ms |
1016 KB |
Output is correct |
| 42 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 43 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 44 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 45 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 46 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 47 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 48 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 49 |
Correct |
3 ms |
896 KB |
Output is correct |
| 50 |
Correct |
0 ms |
384 KB |
Output is correct |
| 51 |
Correct |
94 ms |
12400 KB |
Output is correct |
| 52 |
Correct |
104 ms |
12516 KB |
Output is correct |
| 53 |
Correct |
100 ms |
12388 KB |
Output is correct |
| 54 |
Correct |
96 ms |
12400 KB |
Output is correct |
| 55 |
Correct |
99 ms |
12388 KB |
Output is correct |
| 56 |
Correct |
99 ms |
12384 KB |
Output is correct |
| 57 |
Correct |
101 ms |
12388 KB |
Output is correct |
| 58 |
Correct |
68 ms |
12388 KB |
Output is correct |
| 59 |
Correct |
64 ms |
12388 KB |
Output is correct |
| 60 |
Correct |
0 ms |
384 KB |
Output is correct |
| 61 |
Correct |
150 ms |
17760 KB |
Output is correct |
| 62 |
Correct |
140 ms |
17784 KB |
Output is correct |
| 63 |
Correct |
138 ms |
17748 KB |
Output is correct |
| 64 |
Correct |
144 ms |
17748 KB |
Output is correct |
| 65 |
Correct |
135 ms |
17748 KB |
Output is correct |
| 66 |
Correct |
134 ms |
17748 KB |
Output is correct |
| 67 |
Correct |
137 ms |
17896 KB |
Output is correct |
| 68 |
Correct |
130 ms |
15972 KB |
Output is correct |
| 69 |
Correct |
99 ms |
12512 KB |
Output is correct |
| 70 |
Correct |
0 ms |
384 KB |
Output is correct |
