#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <stack>
#include <deque>
#include <fstream>
#include <iterator>
#include <set>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <cctype>
#include <string>
#include <cassert>
#include <set>
#include <bitset>
#include <unordered_set>
#include <numeric>
#define all(a) a.begin(), a.end()
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define ppi pair<int,pair<int,int>>
#define int int64_t
using namespace std;
// /\_/\
// (= ._.)
// / > \>
// encouraging cat
const int INF = 10000000000000000;
//const int mod = 1000000007;
const int mod = 998244353;
const int MAXN = 200005;
//ifstream fin('xor.in');
//ofstream fout('xor.out');
signed main()
{
int n,q;
cin >> n >> q;
int laped = 0;
vector<pair<bool, int>> infront(n, {true, 0}); // i infront of A
int res = 0;
while (q--)
{
int x;
cin >> x;
if (x > 0)
{
if (!infront[x].first && infront[x].second == laped)
{
laped++;
res++;
infront[x].second = laped;
}
else
{
infront[x].first = false;
infront[x].second = laped;
}
}
else
{
infront[-x].first = true;
}
}
cout << res << '\n';
return 0;
}
Compilation message
Main.cpp:32:1: warning: multi-line comment [-Wcomment]
32 | // /\_/\
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
504 KB |
Output is correct |
4 |
Correct |
20 ms |
924 KB |
Output is correct |
5 |
Correct |
24 ms |
676 KB |
Output is correct |
6 |
Correct |
21 ms |
916 KB |
Output is correct |
7 |
Correct |
30 ms |
848 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
17 ms |
740 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
20 ms |
924 KB |
Output is correct |
13 |
Correct |
1 ms |
336 KB |
Output is correct |
14 |
Correct |
21 ms |
928 KB |
Output is correct |
15 |
Correct |
1 ms |
336 KB |
Output is correct |
16 |
Correct |
20 ms |
804 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
24 ms |
592 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
336 KB |
Output is correct |
2 |
Correct |
19 ms |
796 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
336 KB |
Output is correct |
5 |
Correct |
53 ms |
4696 KB |
Output is correct |
6 |
Correct |
4 ms |
3408 KB |
Output is correct |
7 |
Correct |
21 ms |
592 KB |
Output is correct |
8 |
Correct |
17 ms |
592 KB |
Output is correct |
9 |
Correct |
18 ms |
824 KB |
Output is correct |
10 |
Correct |
21 ms |
960 KB |
Output is correct |
11 |
Correct |
36 ms |
1060 KB |
Output is correct |
12 |
Correct |
32 ms |
1376 KB |
Output is correct |
13 |
Correct |
35 ms |
2128 KB |
Output is correct |
14 |
Correct |
49 ms |
4700 KB |
Output is correct |
15 |
Correct |
47 ms |
4872 KB |
Output is correct |
16 |
Correct |
49 ms |
4688 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
436 KB |
Output is correct |
19 |
Correct |
38 ms |
4700 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
45 ms |
4564 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
3 ms |
3408 KB |
Output is correct |
24 |
Correct |
1 ms |
448 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
508 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
336 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
1 ms |
336 KB |
Output is correct |
13 |
Correct |
1 ms |
592 KB |
Output is correct |
14 |
Correct |
1 ms |
336 KB |
Output is correct |
15 |
Correct |
1 ms |
508 KB |
Output is correct |
16 |
Correct |
1 ms |
336 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
336 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
1 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
504 KB |
Output is correct |
4 |
Correct |
20 ms |
924 KB |
Output is correct |
5 |
Correct |
24 ms |
676 KB |
Output is correct |
6 |
Correct |
21 ms |
916 KB |
Output is correct |
7 |
Correct |
30 ms |
848 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
17 ms |
740 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
20 ms |
924 KB |
Output is correct |
13 |
Correct |
1 ms |
336 KB |
Output is correct |
14 |
Correct |
21 ms |
928 KB |
Output is correct |
15 |
Correct |
1 ms |
336 KB |
Output is correct |
16 |
Correct |
20 ms |
804 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
24 ms |
592 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
2 ms |
336 KB |
Output is correct |
22 |
Correct |
19 ms |
796 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
25 |
Correct |
53 ms |
4696 KB |
Output is correct |
26 |
Correct |
4 ms |
3408 KB |
Output is correct |
27 |
Correct |
21 ms |
592 KB |
Output is correct |
28 |
Correct |
17 ms |
592 KB |
Output is correct |
29 |
Correct |
18 ms |
824 KB |
Output is correct |
30 |
Correct |
21 ms |
960 KB |
Output is correct |
31 |
Correct |
36 ms |
1060 KB |
Output is correct |
32 |
Correct |
32 ms |
1376 KB |
Output is correct |
33 |
Correct |
35 ms |
2128 KB |
Output is correct |
34 |
Correct |
49 ms |
4700 KB |
Output is correct |
35 |
Correct |
47 ms |
4872 KB |
Output is correct |
36 |
Correct |
49 ms |
4688 KB |
Output is correct |
37 |
Correct |
1 ms |
336 KB |
Output is correct |
38 |
Correct |
1 ms |
436 KB |
Output is correct |
39 |
Correct |
38 ms |
4700 KB |
Output is correct |
40 |
Correct |
1 ms |
336 KB |
Output is correct |
41 |
Correct |
45 ms |
4564 KB |
Output is correct |
42 |
Correct |
1 ms |
336 KB |
Output is correct |
43 |
Correct |
3 ms |
3408 KB |
Output is correct |
44 |
Correct |
1 ms |
448 KB |
Output is correct |
45 |
Correct |
1 ms |
336 KB |
Output is correct |
46 |
Correct |
1 ms |
336 KB |
Output is correct |
47 |
Correct |
1 ms |
336 KB |
Output is correct |
48 |
Correct |
1 ms |
508 KB |
Output is correct |
49 |
Correct |
1 ms |
336 KB |
Output is correct |
50 |
Correct |
1 ms |
336 KB |
Output is correct |
51 |
Correct |
1 ms |
336 KB |
Output is correct |
52 |
Correct |
1 ms |
336 KB |
Output is correct |
53 |
Correct |
1 ms |
336 KB |
Output is correct |
54 |
Correct |
1 ms |
336 KB |
Output is correct |
55 |
Correct |
1 ms |
336 KB |
Output is correct |
56 |
Correct |
1 ms |
336 KB |
Output is correct |
57 |
Correct |
1 ms |
592 KB |
Output is correct |
58 |
Correct |
1 ms |
336 KB |
Output is correct |
59 |
Correct |
1 ms |
508 KB |
Output is correct |
60 |
Correct |
1 ms |
336 KB |
Output is correct |
61 |
Correct |
1 ms |
336 KB |
Output is correct |
62 |
Correct |
1 ms |
336 KB |
Output is correct |
63 |
Correct |
1 ms |
336 KB |
Output is correct |
64 |
Correct |
1 ms |
336 KB |
Output is correct |
65 |
Correct |
1 ms |
336 KB |
Output is correct |
66 |
Correct |
1 ms |
336 KB |
Output is correct |
67 |
Correct |
1 ms |
336 KB |
Output is correct |
68 |
Correct |
1 ms |
336 KB |
Output is correct |
69 |
Correct |
1 ms |
336 KB |
Output is correct |
70 |
Correct |
1 ms |
336 KB |
Output is correct |
71 |
Correct |
1 ms |
336 KB |
Output is correct |
72 |
Correct |
29 ms |
924 KB |
Output is correct |
73 |
Correct |
23 ms |
804 KB |
Output is correct |
74 |
Correct |
29 ms |
928 KB |
Output is correct |
75 |
Correct |
21 ms |
848 KB |
Output is correct |
76 |
Correct |
1 ms |
336 KB |
Output is correct |
77 |
Correct |
1 ms |
336 KB |
Output is correct |
78 |
Correct |
17 ms |
592 KB |
Output is correct |
79 |
Correct |
1 ms |
336 KB |
Output is correct |
80 |
Correct |
20 ms |
804 KB |
Output is correct |
81 |
Correct |
1 ms |
336 KB |
Output is correct |
82 |
Correct |
28 ms |
848 KB |
Output is correct |
83 |
Correct |
1 ms |
336 KB |
Output is correct |
84 |
Correct |
21 ms |
848 KB |
Output is correct |
85 |
Correct |
1 ms |
336 KB |
Output is correct |
86 |
Correct |
19 ms |
828 KB |
Output is correct |
87 |
Correct |
1 ms |
336 KB |
Output is correct |
88 |
Correct |
41 ms |
4800 KB |
Output is correct |
89 |
Correct |
3 ms |
3412 KB |
Output is correct |
90 |
Correct |
19 ms |
800 KB |
Output is correct |
91 |
Correct |
21 ms |
592 KB |
Output is correct |
92 |
Correct |
25 ms |
792 KB |
Output is correct |
93 |
Correct |
23 ms |
848 KB |
Output is correct |
94 |
Correct |
26 ms |
1104 KB |
Output is correct |
95 |
Correct |
39 ms |
1360 KB |
Output is correct |
96 |
Correct |
34 ms |
2140 KB |
Output is correct |
97 |
Correct |
45 ms |
4680 KB |
Output is correct |
98 |
Correct |
53 ms |
4792 KB |
Output is correct |
99 |
Correct |
46 ms |
4564 KB |
Output is correct |
100 |
Correct |
1 ms |
504 KB |
Output is correct |
101 |
Correct |
1 ms |
336 KB |
Output is correct |
102 |
Correct |
40 ms |
4576 KB |
Output is correct |
103 |
Correct |
1 ms |
504 KB |
Output is correct |
104 |
Correct |
63 ms |
4700 KB |
Output is correct |
105 |
Correct |
1 ms |
336 KB |
Output is correct |
106 |
Correct |
1 ms |
336 KB |
Output is correct |
107 |
Correct |
1 ms |
336 KB |
Output is correct |
108 |
Correct |
1 ms |
336 KB |
Output is correct |
109 |
Correct |
1 ms |
504 KB |
Output is correct |
110 |
Correct |
1 ms |
336 KB |
Output is correct |
111 |
Correct |
1 ms |
336 KB |
Output is correct |
112 |
Correct |
65 ms |
4956 KB |
Output is correct |
113 |
Correct |
52 ms |
2348 KB |
Output is correct |
114 |
Correct |
39 ms |
4688 KB |
Output is correct |
115 |
Correct |
36 ms |
2120 KB |
Output is correct |
116 |
Correct |
56 ms |
4688 KB |
Output is correct |
117 |
Correct |
3 ms |
3408 KB |
Output is correct |
118 |
Correct |
20 ms |
848 KB |
Output is correct |
119 |
Correct |
20 ms |
804 KB |
Output is correct |
120 |
Correct |
29 ms |
800 KB |
Output is correct |
121 |
Correct |
26 ms |
1052 KB |
Output is correct |
122 |
Correct |
29 ms |
1180 KB |
Output is correct |
123 |
Correct |
45 ms |
1500 KB |
Output is correct |
124 |
Correct |
42 ms |
2360 KB |
Output is correct |
125 |
Correct |
57 ms |
4696 KB |
Output is correct |
126 |
Correct |
46 ms |
4828 KB |
Output is correct |
127 |
Correct |
43 ms |
4820 KB |
Output is correct |
128 |
Correct |
41 ms |
4832 KB |
Output is correct |
129 |
Correct |
59 ms |
4960 KB |
Output is correct |
130 |
Correct |
1 ms |
336 KB |
Output is correct |
131 |
Correct |
1 ms |
336 KB |
Output is correct |
132 |
Correct |
1 ms |
336 KB |
Output is correct |
133 |
Correct |
3 ms |
3408 KB |
Output is correct |
134 |
Correct |
1 ms |
444 KB |
Output is correct |