#include <bits/stdc++.h>
using namespace std;
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int L,R; cin >> L >> R;
vector<pair<int,int>> blocks;
for(int i = 0;i<R;++i){
int X; cin >> X;
vector<int> W(X+1);
int l = 0, r = L;
for(int j = 1;j<=X;++j){
cin >> W[j];
l += W[j];
}
l -= W[X];
for(int j = X;j>=1;--j){
int l1 = l, l2 = r-W[j], r1 = r, r2 = l+W[j];
if(max(l1,l2) < min(r1,r2)){
blocks.push_back({max(l1,l2),min(r1,r2)});
}
if(j != 1) l -= W[j-1];
r -= W[j];
}
}
sort(blocks.begin(),blocks.end());
int l = 0, r = 0, ans = 0;
for(int i = 0;i<blocks.size();++i){
if(blocks[i].first > r){
ans += r-l;
l = r = blocks[i].first;
}
r = max(r,blocks[i].second);
}
ans += r-l;
cout << ans << "\n";
return 0;
}
Compilation message
lasers.cpp: In function 'int main()':
lasers.cpp:28:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | for(int i = 0;i<blocks.size();++i){
| ~^~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
1 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
344 KB |
Output is correct |
6 |
Correct |
0 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
344 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
1 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
344 KB |
Output is correct |
6 |
Correct |
0 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
344 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
11 |
Correct |
1 ms |
344 KB |
Output is correct |
12 |
Correct |
74 ms |
10172 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
0 ms |
344 KB |
Output is correct |
15 |
Correct |
0 ms |
344 KB |
Output is correct |
16 |
Correct |
1 ms |
348 KB |
Output is correct |
17 |
Correct |
85 ms |
7876 KB |
Output is correct |
18 |
Correct |
0 ms |
344 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
0 ms |
344 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
3664 KB |
Output is correct |
2 |
Correct |
5 ms |
1112 KB |
Output is correct |
3 |
Correct |
5 ms |
908 KB |
Output is correct |
4 |
Correct |
28 ms |
3796 KB |
Output is correct |
5 |
Correct |
10 ms |
2512 KB |
Output is correct |
6 |
Correct |
18 ms |
2648 KB |
Output is correct |
7 |
Correct |
1 ms |
344 KB |
Output is correct |
8 |
Correct |
22 ms |
2988 KB |
Output is correct |
9 |
Correct |
15 ms |
2896 KB |
Output is correct |
10 |
Correct |
26 ms |
3976 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
1 ms |
344 KB |
Output is correct |
5 |
Correct |
0 ms |
344 KB |
Output is correct |
6 |
Correct |
0 ms |
344 KB |
Output is correct |
7 |
Correct |
1 ms |
344 KB |
Output is correct |
8 |
Correct |
1 ms |
344 KB |
Output is correct |
9 |
Correct |
1 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
3664 KB |
Output is correct |
2 |
Correct |
5 ms |
1112 KB |
Output is correct |
3 |
Correct |
5 ms |
908 KB |
Output is correct |
4 |
Correct |
28 ms |
3796 KB |
Output is correct |
5 |
Correct |
10 ms |
2512 KB |
Output is correct |
6 |
Correct |
18 ms |
2648 KB |
Output is correct |
7 |
Correct |
1 ms |
344 KB |
Output is correct |
8 |
Correct |
22 ms |
2988 KB |
Output is correct |
9 |
Correct |
15 ms |
2896 KB |
Output is correct |
10 |
Correct |
26 ms |
3976 KB |
Output is correct |
11 |
Correct |
0 ms |
344 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
1 ms |
344 KB |
Output is correct |
15 |
Correct |
0 ms |
344 KB |
Output is correct |
16 |
Correct |
0 ms |
344 KB |
Output is correct |
17 |
Correct |
1 ms |
344 KB |
Output is correct |
18 |
Correct |
1 ms |
344 KB |
Output is correct |
19 |
Correct |
1 ms |
344 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
82 ms |
6596 KB |
Output is correct |
22 |
Correct |
12 ms |
1520 KB |
Output is correct |
23 |
Correct |
7 ms |
1232 KB |
Output is correct |
24 |
Correct |
29 ms |
3836 KB |
Output is correct |
25 |
Correct |
86 ms |
6604 KB |
Output is correct |
26 |
Correct |
24 ms |
3800 KB |
Output is correct |
27 |
Correct |
10 ms |
1524 KB |
Output is correct |
28 |
Correct |
79 ms |
6596 KB |
Output is correct |
29 |
Correct |
80 ms |
6604 KB |
Output is correct |
30 |
Correct |
22 ms |
2584 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
1 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
344 KB |
Output is correct |
6 |
Correct |
0 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
344 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
11 |
Correct |
1 ms |
344 KB |
Output is correct |
12 |
Correct |
74 ms |
10172 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
0 ms |
344 KB |
Output is correct |
15 |
Correct |
0 ms |
344 KB |
Output is correct |
16 |
Correct |
1 ms |
348 KB |
Output is correct |
17 |
Correct |
85 ms |
7876 KB |
Output is correct |
18 |
Correct |
0 ms |
344 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
0 ms |
344 KB |
Output is correct |
21 |
Correct |
24 ms |
3664 KB |
Output is correct |
22 |
Correct |
5 ms |
1112 KB |
Output is correct |
23 |
Correct |
5 ms |
908 KB |
Output is correct |
24 |
Correct |
28 ms |
3796 KB |
Output is correct |
25 |
Correct |
10 ms |
2512 KB |
Output is correct |
26 |
Correct |
18 ms |
2648 KB |
Output is correct |
27 |
Correct |
1 ms |
344 KB |
Output is correct |
28 |
Correct |
22 ms |
2988 KB |
Output is correct |
29 |
Correct |
15 ms |
2896 KB |
Output is correct |
30 |
Correct |
26 ms |
3976 KB |
Output is correct |
31 |
Correct |
0 ms |
344 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
344 KB |
Output is correct |
34 |
Correct |
1 ms |
344 KB |
Output is correct |
35 |
Correct |
0 ms |
344 KB |
Output is correct |
36 |
Correct |
0 ms |
344 KB |
Output is correct |
37 |
Correct |
1 ms |
344 KB |
Output is correct |
38 |
Correct |
1 ms |
344 KB |
Output is correct |
39 |
Correct |
1 ms |
344 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
82 ms |
6596 KB |
Output is correct |
42 |
Correct |
12 ms |
1520 KB |
Output is correct |
43 |
Correct |
7 ms |
1232 KB |
Output is correct |
44 |
Correct |
29 ms |
3836 KB |
Output is correct |
45 |
Correct |
86 ms |
6604 KB |
Output is correct |
46 |
Correct |
24 ms |
3800 KB |
Output is correct |
47 |
Correct |
10 ms |
1524 KB |
Output is correct |
48 |
Correct |
79 ms |
6596 KB |
Output is correct |
49 |
Correct |
80 ms |
6604 KB |
Output is correct |
50 |
Correct |
22 ms |
2584 KB |
Output is correct |
51 |
Correct |
11 ms |
1744 KB |
Output is correct |
52 |
Correct |
85 ms |
7972 KB |
Output is correct |
53 |
Correct |
85 ms |
7940 KB |
Output is correct |
54 |
Correct |
19 ms |
3052 KB |
Output is correct |
55 |
Correct |
44 ms |
5328 KB |
Output is correct |
56 |
Correct |
26 ms |
3980 KB |
Output is correct |
57 |
Correct |
30 ms |
4564 KB |
Output is correct |
58 |
Correct |
87 ms |
8132 KB |
Output is correct |
59 |
Correct |
22 ms |
2792 KB |
Output is correct |
60 |
Correct |
30 ms |
3812 KB |
Output is correct |