#include<iostream>
#include<cstring>
#include<vector>
#include<queue>
#include<set>
using namespace std;
const int MAXN = 2e5 + 5;
struct fenwickTree
{
int tree[MAXN];
fenwickTree()
{
memset(this->tree, 0, sizeof(this->tree));
}
void update(int index, int value)
{
index++;
while(index<MAXN)
{
this->tree[index] += value;
index += index&(-index);
}
}
int query(int index)
{
int sum = 0;
index++;
while(index>0)
{
sum += this->tree[index];
index -= index&(-index);
}
return sum;
}
};
fenwickTree *T = new fenwickTree();
queue <int> leftShoes[MAXN], rightShoes[MAXN];
int calcValue(int num, int index, int bestLeft, int bestRight)
{
int sum = (bestLeft - index) + (bestRight - (index+1));
if(bestLeft>bestRight) sum++;
return sum;
}
long long count_swaps(vector <int> s)
{
set <int> allIndexes;
for(int i = 0;i<s.size();i++)
{
allIndexes.insert(i);
if(s[i]<0) leftShoes[ -s[i] ].push(i);
else rightShoes[ s[i] ].push(i);
}
long long answer = 0;
for(int index = 0;index<s.size();index+=2)
{
int bestIndex = -1;
int bestLeft, bestRight;
bestIndex = abs(s[*allIndexes.begin()]);
allIndexes.erase(leftShoes[bestIndex].front());
allIndexes.erase(rightShoes[bestIndex].front());
bestLeft = leftShoes[bestIndex].front() - T->query(leftShoes[bestIndex].front());
bestRight = rightShoes[bestIndex].front() - T->query(rightShoes[bestIndex].front());
T->update(leftShoes[bestIndex].front(), 1);
T->update(rightShoes[bestIndex].front(), 1);
leftShoes[bestIndex].pop();
rightShoes[bestIndex].pop();
//cout << bestLeft << " " << bestRight << '\n';
answer += calcValue(bestIndex, 0, bestLeft, bestRight);
}
//for(int i = 0;i<s.size();i++) cout << s[i] << " ";
//cout << '\n';
return answer;
}
Compilation message
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:59:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0;i<s.size();i++)
~^~~~~~~~~
shoes.cpp:68:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int index = 0;index<s.size();index+=2)
~~~~~^~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
289 ms |
270456 KB |
Output is correct |
2 |
Correct |
274 ms |
270564 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
289 ms |
270456 KB |
Output is correct |
2 |
Correct |
274 ms |
270564 KB |
Output is correct |
3 |
Correct |
275 ms |
270332 KB |
Output is correct |
4 |
Correct |
288 ms |
270424 KB |
Output is correct |
5 |
Correct |
273 ms |
270504 KB |
Output is correct |
6 |
Correct |
276 ms |
270364 KB |
Output is correct |
7 |
Correct |
302 ms |
270388 KB |
Output is correct |
8 |
Correct |
273 ms |
270356 KB |
Output is correct |
9 |
Correct |
271 ms |
270504 KB |
Output is correct |
10 |
Correct |
276 ms |
270456 KB |
Output is correct |
11 |
Correct |
313 ms |
270584 KB |
Output is correct |
12 |
Correct |
282 ms |
270456 KB |
Output is correct |
13 |
Correct |
284 ms |
270456 KB |
Output is correct |
14 |
Correct |
274 ms |
270456 KB |
Output is correct |
15 |
Correct |
272 ms |
270396 KB |
Output is correct |
16 |
Correct |
287 ms |
270460 KB |
Output is correct |
17 |
Correct |
277 ms |
270460 KB |
Output is correct |
18 |
Correct |
277 ms |
270456 KB |
Output is correct |
19 |
Correct |
276 ms |
270456 KB |
Output is correct |
20 |
Correct |
274 ms |
270356 KB |
Output is correct |
21 |
Correct |
273 ms |
270452 KB |
Output is correct |
22 |
Correct |
274 ms |
270380 KB |
Output is correct |
23 |
Correct |
272 ms |
270328 KB |
Output is correct |
24 |
Correct |
275 ms |
270496 KB |
Output is correct |
25 |
Correct |
274 ms |
270456 KB |
Output is correct |
26 |
Correct |
274 ms |
270436 KB |
Output is correct |
27 |
Correct |
274 ms |
270544 KB |
Output is correct |
28 |
Correct |
274 ms |
270456 KB |
Output is correct |
29 |
Correct |
275 ms |
270456 KB |
Output is correct |
30 |
Correct |
278 ms |
270480 KB |
Output is correct |
31 |
Correct |
273 ms |
270456 KB |
Output is correct |
32 |
Correct |
282 ms |
270556 KB |
Output is correct |
33 |
Correct |
271 ms |
270456 KB |
Output is correct |
34 |
Correct |
273 ms |
270456 KB |
Output is correct |
35 |
Correct |
277 ms |
270444 KB |
Output is correct |
36 |
Correct |
274 ms |
270440 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
289 ms |
270456 KB |
Output is correct |
2 |
Correct |
274 ms |
270564 KB |
Output is correct |
3 |
Correct |
292 ms |
270508 KB |
Output is correct |
4 |
Correct |
303 ms |
270312 KB |
Output is correct |
5 |
Correct |
275 ms |
270420 KB |
Output is correct |
6 |
Correct |
275 ms |
270328 KB |
Output is correct |
7 |
Correct |
278 ms |
270456 KB |
Output is correct |
8 |
Correct |
274 ms |
270456 KB |
Output is correct |
9 |
Correct |
275 ms |
270424 KB |
Output is correct |
10 |
Correct |
274 ms |
270400 KB |
Output is correct |
11 |
Correct |
274 ms |
270456 KB |
Output is correct |
12 |
Correct |
275 ms |
270612 KB |
Output is correct |
13 |
Correct |
273 ms |
270392 KB |
Output is correct |
14 |
Correct |
273 ms |
270412 KB |
Output is correct |
15 |
Correct |
277 ms |
270396 KB |
Output is correct |
16 |
Correct |
307 ms |
270456 KB |
Output is correct |
17 |
Correct |
322 ms |
270584 KB |
Output is correct |
18 |
Correct |
314 ms |
270632 KB |
Output is correct |
19 |
Correct |
315 ms |
270584 KB |
Output is correct |
20 |
Correct |
310 ms |
271736 KB |
Output is correct |
21 |
Correct |
304 ms |
271608 KB |
Output is correct |
22 |
Correct |
393 ms |
282332 KB |
Output is correct |
23 |
Correct |
438 ms |
282228 KB |
Output is correct |
24 |
Correct |
433 ms |
282120 KB |
Output is correct |
25 |
Correct |
438 ms |
282360 KB |
Output is correct |
26 |
Correct |
426 ms |
282208 KB |
Output is correct |
27 |
Correct |
384 ms |
282256 KB |
Output is correct |
28 |
Correct |
387 ms |
282204 KB |
Output is correct |
29 |
Correct |
386 ms |
282236 KB |
Output is correct |
30 |
Correct |
390 ms |
282232 KB |
Output is correct |
31 |
Correct |
403 ms |
282280 KB |
Output is correct |
32 |
Correct |
388 ms |
282276 KB |
Output is correct |
33 |
Correct |
385 ms |
282184 KB |
Output is correct |
34 |
Correct |
393 ms |
282328 KB |
Output is correct |
35 |
Correct |
276 ms |
270456 KB |
Output is correct |
36 |
Correct |
271 ms |
270456 KB |
Output is correct |
37 |
Correct |
384 ms |
282232 KB |
Output is correct |
38 |
Correct |
382 ms |
282292 KB |
Output is correct |
39 |
Correct |
394 ms |
282232 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
277 ms |
270468 KB |
Output is correct |
2 |
Correct |
272 ms |
270588 KB |
Output is correct |
3 |
Correct |
275 ms |
270596 KB |
Output is correct |
4 |
Correct |
273 ms |
270360 KB |
Output is correct |
5 |
Correct |
492 ms |
281484 KB |
Output is correct |
6 |
Correct |
435 ms |
281576 KB |
Output is correct |
7 |
Correct |
464 ms |
281464 KB |
Output is correct |
8 |
Correct |
380 ms |
282236 KB |
Output is correct |
9 |
Correct |
486 ms |
281592 KB |
Output is correct |
10 |
Correct |
458 ms |
281420 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
289 ms |
270456 KB |
Output is correct |
2 |
Correct |
274 ms |
270564 KB |
Output is correct |
3 |
Correct |
275 ms |
270332 KB |
Output is correct |
4 |
Correct |
288 ms |
270424 KB |
Output is correct |
5 |
Correct |
273 ms |
270504 KB |
Output is correct |
6 |
Correct |
276 ms |
270364 KB |
Output is correct |
7 |
Correct |
302 ms |
270388 KB |
Output is correct |
8 |
Correct |
273 ms |
270356 KB |
Output is correct |
9 |
Correct |
271 ms |
270504 KB |
Output is correct |
10 |
Correct |
276 ms |
270456 KB |
Output is correct |
11 |
Correct |
313 ms |
270584 KB |
Output is correct |
12 |
Correct |
282 ms |
270456 KB |
Output is correct |
13 |
Correct |
284 ms |
270456 KB |
Output is correct |
14 |
Correct |
274 ms |
270456 KB |
Output is correct |
15 |
Correct |
272 ms |
270396 KB |
Output is correct |
16 |
Correct |
287 ms |
270460 KB |
Output is correct |
17 |
Correct |
277 ms |
270460 KB |
Output is correct |
18 |
Correct |
277 ms |
270456 KB |
Output is correct |
19 |
Correct |
276 ms |
270456 KB |
Output is correct |
20 |
Correct |
274 ms |
270356 KB |
Output is correct |
21 |
Correct |
273 ms |
270452 KB |
Output is correct |
22 |
Correct |
274 ms |
270380 KB |
Output is correct |
23 |
Correct |
272 ms |
270328 KB |
Output is correct |
24 |
Correct |
275 ms |
270496 KB |
Output is correct |
25 |
Correct |
274 ms |
270456 KB |
Output is correct |
26 |
Correct |
274 ms |
270436 KB |
Output is correct |
27 |
Correct |
274 ms |
270544 KB |
Output is correct |
28 |
Correct |
274 ms |
270456 KB |
Output is correct |
29 |
Correct |
275 ms |
270456 KB |
Output is correct |
30 |
Correct |
278 ms |
270480 KB |
Output is correct |
31 |
Correct |
273 ms |
270456 KB |
Output is correct |
32 |
Correct |
282 ms |
270556 KB |
Output is correct |
33 |
Correct |
271 ms |
270456 KB |
Output is correct |
34 |
Correct |
273 ms |
270456 KB |
Output is correct |
35 |
Correct |
277 ms |
270444 KB |
Output is correct |
36 |
Correct |
274 ms |
270440 KB |
Output is correct |
37 |
Correct |
273 ms |
270428 KB |
Output is correct |
38 |
Correct |
277 ms |
270584 KB |
Output is correct |
39 |
Correct |
275 ms |
270496 KB |
Output is correct |
40 |
Correct |
279 ms |
270460 KB |
Output is correct |
41 |
Correct |
279 ms |
270512 KB |
Output is correct |
42 |
Correct |
274 ms |
270456 KB |
Output is correct |
43 |
Correct |
303 ms |
270516 KB |
Output is correct |
44 |
Correct |
278 ms |
270464 KB |
Output is correct |
45 |
Correct |
276 ms |
270460 KB |
Output is correct |
46 |
Correct |
277 ms |
270536 KB |
Output is correct |
47 |
Correct |
273 ms |
270456 KB |
Output is correct |
48 |
Correct |
272 ms |
270456 KB |
Output is correct |
49 |
Correct |
273 ms |
270444 KB |
Output is correct |
50 |
Correct |
298 ms |
270456 KB |
Output is correct |
51 |
Correct |
314 ms |
270556 KB |
Output is correct |
52 |
Correct |
280 ms |
270448 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
289 ms |
270456 KB |
Output is correct |
2 |
Correct |
274 ms |
270564 KB |
Output is correct |
3 |
Correct |
275 ms |
270332 KB |
Output is correct |
4 |
Correct |
288 ms |
270424 KB |
Output is correct |
5 |
Correct |
273 ms |
270504 KB |
Output is correct |
6 |
Correct |
276 ms |
270364 KB |
Output is correct |
7 |
Correct |
302 ms |
270388 KB |
Output is correct |
8 |
Correct |
273 ms |
270356 KB |
Output is correct |
9 |
Correct |
271 ms |
270504 KB |
Output is correct |
10 |
Correct |
276 ms |
270456 KB |
Output is correct |
11 |
Correct |
313 ms |
270584 KB |
Output is correct |
12 |
Correct |
282 ms |
270456 KB |
Output is correct |
13 |
Correct |
284 ms |
270456 KB |
Output is correct |
14 |
Correct |
274 ms |
270456 KB |
Output is correct |
15 |
Correct |
272 ms |
270396 KB |
Output is correct |
16 |
Correct |
287 ms |
270460 KB |
Output is correct |
17 |
Correct |
277 ms |
270460 KB |
Output is correct |
18 |
Correct |
277 ms |
270456 KB |
Output is correct |
19 |
Correct |
276 ms |
270456 KB |
Output is correct |
20 |
Correct |
274 ms |
270356 KB |
Output is correct |
21 |
Correct |
273 ms |
270452 KB |
Output is correct |
22 |
Correct |
274 ms |
270380 KB |
Output is correct |
23 |
Correct |
272 ms |
270328 KB |
Output is correct |
24 |
Correct |
275 ms |
270496 KB |
Output is correct |
25 |
Correct |
274 ms |
270456 KB |
Output is correct |
26 |
Correct |
274 ms |
270436 KB |
Output is correct |
27 |
Correct |
274 ms |
270544 KB |
Output is correct |
28 |
Correct |
274 ms |
270456 KB |
Output is correct |
29 |
Correct |
275 ms |
270456 KB |
Output is correct |
30 |
Correct |
278 ms |
270480 KB |
Output is correct |
31 |
Correct |
273 ms |
270456 KB |
Output is correct |
32 |
Correct |
282 ms |
270556 KB |
Output is correct |
33 |
Correct |
271 ms |
270456 KB |
Output is correct |
34 |
Correct |
273 ms |
270456 KB |
Output is correct |
35 |
Correct |
277 ms |
270444 KB |
Output is correct |
36 |
Correct |
274 ms |
270440 KB |
Output is correct |
37 |
Correct |
292 ms |
270508 KB |
Output is correct |
38 |
Correct |
303 ms |
270312 KB |
Output is correct |
39 |
Correct |
275 ms |
270420 KB |
Output is correct |
40 |
Correct |
275 ms |
270328 KB |
Output is correct |
41 |
Correct |
278 ms |
270456 KB |
Output is correct |
42 |
Correct |
274 ms |
270456 KB |
Output is correct |
43 |
Correct |
275 ms |
270424 KB |
Output is correct |
44 |
Correct |
274 ms |
270400 KB |
Output is correct |
45 |
Correct |
274 ms |
270456 KB |
Output is correct |
46 |
Correct |
275 ms |
270612 KB |
Output is correct |
47 |
Correct |
273 ms |
270392 KB |
Output is correct |
48 |
Correct |
273 ms |
270412 KB |
Output is correct |
49 |
Correct |
277 ms |
270396 KB |
Output is correct |
50 |
Correct |
307 ms |
270456 KB |
Output is correct |
51 |
Correct |
322 ms |
270584 KB |
Output is correct |
52 |
Correct |
314 ms |
270632 KB |
Output is correct |
53 |
Correct |
315 ms |
270584 KB |
Output is correct |
54 |
Correct |
310 ms |
271736 KB |
Output is correct |
55 |
Correct |
304 ms |
271608 KB |
Output is correct |
56 |
Correct |
393 ms |
282332 KB |
Output is correct |
57 |
Correct |
438 ms |
282228 KB |
Output is correct |
58 |
Correct |
433 ms |
282120 KB |
Output is correct |
59 |
Correct |
438 ms |
282360 KB |
Output is correct |
60 |
Correct |
426 ms |
282208 KB |
Output is correct |
61 |
Correct |
384 ms |
282256 KB |
Output is correct |
62 |
Correct |
387 ms |
282204 KB |
Output is correct |
63 |
Correct |
386 ms |
282236 KB |
Output is correct |
64 |
Correct |
390 ms |
282232 KB |
Output is correct |
65 |
Correct |
403 ms |
282280 KB |
Output is correct |
66 |
Correct |
388 ms |
282276 KB |
Output is correct |
67 |
Correct |
385 ms |
282184 KB |
Output is correct |
68 |
Correct |
393 ms |
282328 KB |
Output is correct |
69 |
Correct |
276 ms |
270456 KB |
Output is correct |
70 |
Correct |
271 ms |
270456 KB |
Output is correct |
71 |
Correct |
384 ms |
282232 KB |
Output is correct |
72 |
Correct |
382 ms |
282292 KB |
Output is correct |
73 |
Correct |
394 ms |
282232 KB |
Output is correct |
74 |
Correct |
277 ms |
270468 KB |
Output is correct |
75 |
Correct |
272 ms |
270588 KB |
Output is correct |
76 |
Correct |
275 ms |
270596 KB |
Output is correct |
77 |
Correct |
273 ms |
270360 KB |
Output is correct |
78 |
Correct |
492 ms |
281484 KB |
Output is correct |
79 |
Correct |
435 ms |
281576 KB |
Output is correct |
80 |
Correct |
464 ms |
281464 KB |
Output is correct |
81 |
Correct |
380 ms |
282236 KB |
Output is correct |
82 |
Correct |
486 ms |
281592 KB |
Output is correct |
83 |
Correct |
458 ms |
281420 KB |
Output is correct |
84 |
Correct |
273 ms |
270428 KB |
Output is correct |
85 |
Correct |
277 ms |
270584 KB |
Output is correct |
86 |
Correct |
275 ms |
270496 KB |
Output is correct |
87 |
Correct |
279 ms |
270460 KB |
Output is correct |
88 |
Correct |
279 ms |
270512 KB |
Output is correct |
89 |
Correct |
274 ms |
270456 KB |
Output is correct |
90 |
Correct |
303 ms |
270516 KB |
Output is correct |
91 |
Correct |
278 ms |
270464 KB |
Output is correct |
92 |
Correct |
276 ms |
270460 KB |
Output is correct |
93 |
Correct |
277 ms |
270536 KB |
Output is correct |
94 |
Correct |
273 ms |
270456 KB |
Output is correct |
95 |
Correct |
272 ms |
270456 KB |
Output is correct |
96 |
Correct |
273 ms |
270444 KB |
Output is correct |
97 |
Correct |
298 ms |
270456 KB |
Output is correct |
98 |
Correct |
314 ms |
270556 KB |
Output is correct |
99 |
Correct |
280 ms |
270448 KB |
Output is correct |
100 |
Correct |
276 ms |
270644 KB |
Output is correct |
101 |
Correct |
294 ms |
271516 KB |
Output is correct |
102 |
Correct |
319 ms |
271624 KB |
Output is correct |
103 |
Correct |
561 ms |
281504 KB |
Output is correct |
104 |
Correct |
470 ms |
281428 KB |
Output is correct |
105 |
Correct |
482 ms |
281484 KB |
Output is correct |
106 |
Correct |
470 ms |
281408 KB |
Output is correct |
107 |
Correct |
493 ms |
281404 KB |
Output is correct |
108 |
Correct |
449 ms |
281376 KB |
Output is correct |
109 |
Correct |
388 ms |
282192 KB |
Output is correct |
110 |
Correct |
388 ms |
282104 KB |
Output is correct |
111 |
Correct |
469 ms |
281360 KB |
Output is correct |
112 |
Correct |
507 ms |
281384 KB |
Output is correct |
113 |
Correct |
491 ms |
281312 KB |
Output is correct |
114 |
Correct |
470 ms |
281596 KB |
Output is correct |
115 |
Correct |
463 ms |
281336 KB |
Output is correct |