/**
____ ____ ____ ____ ____
||a |||t |||o |||d |||o ||
||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|
**/
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N_MAX = 200002;
int n;
int d[N_MAX];
int p[N_MAX];
set <int> s;
int BIT[N_MAX];
void update (int pos)
{
for(int i = pos; i >= 1; i -= i & -i)
BIT[i]++;
}
int query (int pos)
{
int ans = 0;
for(int i = pos; i <= n; i += i & -i)
ans += BIT[i];
return ans;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n;
for(int i = 1; i <= n; i++)
cin >> d[i];
for(int i = 1; i <= n; i++)
s.insert(i);
for(int i = n; i >= 1; i--)
{
set <int> :: iterator it = s.upper_bound(d[i]);
if(it == s.begin())
{
cout << "-1\n";
return 0;
}
it--;
p[i] = *it;
s.erase(it);
}
ll ans = 0;
for(int i = 1; i <= n; i++)
{
ans += query(p[i]);
update(p[i]);
}
cout << ans << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
620 KB |
Output is correct |
| 2 |
Correct |
2 ms |
620 KB |
Output is correct |
| 3 |
Correct |
2 ms |
620 KB |
Output is correct |
| 4 |
Correct |
2 ms |
620 KB |
Output is correct |
| 5 |
Correct |
2 ms |
620 KB |
Output is correct |
| 6 |
Correct |
2 ms |
620 KB |
Output is correct |
| 7 |
Correct |
3 ms |
620 KB |
Output is correct |
| 8 |
Correct |
3 ms |
620 KB |
Output is correct |
| 9 |
Correct |
2 ms |
620 KB |
Output is correct |
| 10 |
Correct |
2 ms |
620 KB |
Output is correct |
| 11 |
Correct |
3 ms |
620 KB |
Output is correct |
| 12 |
Correct |
3 ms |
620 KB |
Output is correct |
| 13 |
Correct |
3 ms |
620 KB |
Output is correct |
| 14 |
Correct |
3 ms |
620 KB |
Output is correct |
| 15 |
Correct |
2 ms |
620 KB |
Output is correct |
| 16 |
Correct |
2 ms |
620 KB |
Output is correct |
| 17 |
Correct |
2 ms |
620 KB |
Output is correct |
| 18 |
Correct |
3 ms |
620 KB |
Output is correct |
| 19 |
Correct |
3 ms |
620 KB |
Output is correct |
| 20 |
Correct |
3 ms |
620 KB |
Output is correct |
| 21 |
Correct |
2 ms |
620 KB |
Output is correct |
| 22 |
Correct |
3 ms |
620 KB |
Output is correct |
| 23 |
Correct |
3 ms |
620 KB |
Output is correct |
| 24 |
Correct |
3 ms |
620 KB |
Output is correct |
| 25 |
Correct |
2 ms |
620 KB |
Output is correct |
| 26 |
Correct |
2 ms |
620 KB |
Output is correct |
| 27 |
Correct |
2 ms |
620 KB |
Output is correct |
| 28 |
Correct |
2 ms |
620 KB |
Output is correct |
| 29 |
Correct |
2 ms |
620 KB |
Output is correct |
| 30 |
Correct |
2 ms |
748 KB |
Output is correct |
| 31 |
Correct |
2 ms |
620 KB |
Output is correct |
| 32 |
Correct |
2 ms |
620 KB |
Output is correct |
| 33 |
Correct |
2 ms |
620 KB |
Output is correct |
| 34 |
Correct |
3 ms |
620 KB |
Output is correct |
| 35 |
Correct |
2 ms |
620 KB |
Output is correct |
| 36 |
Correct |
2 ms |
620 KB |
Output is correct |
| 37 |
Correct |
2 ms |
620 KB |
Output is correct |
| 38 |
Correct |
2 ms |
640 KB |
Output is correct |
| 39 |
Correct |
3 ms |
620 KB |
Output is correct |
| 40 |
Correct |
3 ms |
620 KB |
Output is correct |
| 41 |
Correct |
3 ms |
620 KB |
Output is correct |
| 42 |
Correct |
2 ms |
620 KB |
Output is correct |
| 43 |
Correct |
2 ms |
620 KB |
Output is correct |
| 44 |
Correct |
1 ms |
364 KB |
Output is correct |
| 45 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
620 KB |
Output is correct |
| 2 |
Correct |
2 ms |
620 KB |
Output is correct |
| 3 |
Correct |
2 ms |
620 KB |
Output is correct |
| 4 |
Correct |
2 ms |
620 KB |
Output is correct |
| 5 |
Correct |
2 ms |
620 KB |
Output is correct |
| 6 |
Correct |
2 ms |
620 KB |
Output is correct |
| 7 |
Correct |
3 ms |
620 KB |
Output is correct |
| 8 |
Correct |
3 ms |
620 KB |
Output is correct |
| 9 |
Correct |
2 ms |
620 KB |
Output is correct |
| 10 |
Correct |
2 ms |
620 KB |
Output is correct |
| 11 |
Correct |
3 ms |
620 KB |
Output is correct |
| 12 |
Correct |
3 ms |
620 KB |
Output is correct |
| 13 |
Correct |
3 ms |
620 KB |
Output is correct |
| 14 |
Correct |
3 ms |
620 KB |
Output is correct |
| 15 |
Correct |
2 ms |
620 KB |
Output is correct |
| 16 |
Correct |
2 ms |
620 KB |
Output is correct |
| 17 |
Correct |
2 ms |
620 KB |
Output is correct |
| 18 |
Correct |
3 ms |
620 KB |
Output is correct |
| 19 |
Correct |
3 ms |
620 KB |
Output is correct |
| 20 |
Correct |
3 ms |
620 KB |
Output is correct |
| 21 |
Correct |
2 ms |
620 KB |
Output is correct |
| 22 |
Correct |
3 ms |
620 KB |
Output is correct |
| 23 |
Correct |
3 ms |
620 KB |
Output is correct |
| 24 |
Correct |
3 ms |
620 KB |
Output is correct |
| 25 |
Correct |
2 ms |
620 KB |
Output is correct |
| 26 |
Correct |
2 ms |
620 KB |
Output is correct |
| 27 |
Correct |
2 ms |
620 KB |
Output is correct |
| 28 |
Correct |
2 ms |
620 KB |
Output is correct |
| 29 |
Correct |
2 ms |
620 KB |
Output is correct |
| 30 |
Correct |
2 ms |
748 KB |
Output is correct |
| 31 |
Correct |
2 ms |
620 KB |
Output is correct |
| 32 |
Correct |
2 ms |
620 KB |
Output is correct |
| 33 |
Correct |
2 ms |
620 KB |
Output is correct |
| 34 |
Correct |
3 ms |
620 KB |
Output is correct |
| 35 |
Correct |
2 ms |
620 KB |
Output is correct |
| 36 |
Correct |
2 ms |
620 KB |
Output is correct |
| 37 |
Correct |
2 ms |
620 KB |
Output is correct |
| 38 |
Correct |
2 ms |
640 KB |
Output is correct |
| 39 |
Correct |
3 ms |
620 KB |
Output is correct |
| 40 |
Correct |
3 ms |
620 KB |
Output is correct |
| 41 |
Correct |
3 ms |
620 KB |
Output is correct |
| 42 |
Correct |
2 ms |
620 KB |
Output is correct |
| 43 |
Correct |
2 ms |
620 KB |
Output is correct |
| 44 |
Correct |
1 ms |
364 KB |
Output is correct |
| 45 |
Correct |
1 ms |
364 KB |
Output is correct |
| 46 |
Correct |
116 ms |
13420 KB |
Output is correct |
| 47 |
Correct |
116 ms |
13420 KB |
Output is correct |
| 48 |
Correct |
92 ms |
13420 KB |
Output is correct |
| 49 |
Correct |
114 ms |
13548 KB |
Output is correct |
| 50 |
Correct |
129 ms |
13548 KB |
Output is correct |
| 51 |
Correct |
115 ms |
13420 KB |
Output is correct |
| 52 |
Correct |
188 ms |
13292 KB |
Output is correct |
| 53 |
Correct |
188 ms |
13548 KB |
Output is correct |
| 54 |
Correct |
134 ms |
13420 KB |
Output is correct |
| 55 |
Correct |
94 ms |
13404 KB |
Output is correct |
| 56 |
Correct |
137 ms |
13292 KB |
Output is correct |
| 57 |
Correct |
138 ms |
13292 KB |
Output is correct |
| 58 |
Correct |
186 ms |
13292 KB |
Output is correct |
| 59 |
Correct |
232 ms |
13292 KB |
Output is correct |
| 60 |
Correct |
163 ms |
13420 KB |
Output is correct |
| 61 |
Correct |
135 ms |
13292 KB |
Output is correct |
| 62 |
Correct |
100 ms |
13292 KB |
Output is correct |
| 63 |
Correct |
145 ms |
13548 KB |
Output is correct |
| 64 |
Correct |
191 ms |
13292 KB |
Output is correct |
| 65 |
Correct |
173 ms |
13500 KB |
Output is correct |
| 66 |
Correct |
141 ms |
13292 KB |
Output is correct |
| 67 |
Correct |
125 ms |
13420 KB |
Output is correct |
| 68 |
Correct |
152 ms |
13292 KB |
Output is correct |
| 69 |
Correct |
171 ms |
13312 KB |
Output is correct |
| 70 |
Correct |
140 ms |
13420 KB |
Output is correct |
| 71 |
Correct |
155 ms |
13548 KB |
Output is correct |
| 72 |
Correct |
160 ms |
13420 KB |
Output is correct |
| 73 |
Correct |
115 ms |
13420 KB |
Output is correct |
| 74 |
Correct |
105 ms |
13420 KB |
Output is correct |
| 75 |
Correct |
142 ms |
13420 KB |
Output is correct |
| 76 |
Correct |
119 ms |
12652 KB |
Output is correct |
| 77 |
Correct |
81 ms |
13420 KB |
Output is correct |
| 78 |
Correct |
106 ms |
13356 KB |
Output is correct |
| 79 |
Correct |
88 ms |
13420 KB |
Output is correct |
| 80 |
Correct |
114 ms |
12652 KB |
Output is correct |
| 81 |
Correct |
86 ms |
13484 KB |
Output is correct |
| 82 |
Correct |
93 ms |
13292 KB |
Output is correct |
| 83 |
Correct |
94 ms |
13292 KB |
Output is correct |
| 84 |
Correct |
142 ms |
13488 KB |
Output is correct |
| 85 |
Correct |
151 ms |
13420 KB |
Output is correct |
| 86 |
Correct |
147 ms |
13388 KB |
Output is correct |
| 87 |
Correct |
134 ms |
12696 KB |
Output is correct |
| 88 |
Correct |
138 ms |
13408 KB |
Output is correct |
