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Submission #984426

# Submission time Handle Problem Language Result Execution time Memory
984426 2024-05-16T16:05:37 Z SmuggingSpun Strange Device (APIO19_strange_device) C++14
100 / 100
 439 ms 71832 KB 
#include<bits/stdc++.h>
#define taskname "A"
using namespace std;
typedef long long ll;
const int lim = 1e6 + 5;
const ll INF = 1e18;
int n;
ll A, B, S = 0, l[lim], r[lim];
namespace sub1{
	void solve(){
		map<pair<ll, ll>, bool>cnt;
		for(int i = 0; i < n; i++){
			for(ll j = l[i]; j <= r[i]; j++){
				cnt[make_pair((j + j / B) % A, j % B)] = true;
			}
		}
		cout << cnt.size();
	}
}
ll next_mod(ll current, ll d, ll r){
	ll R = current % d;
	if(R < r){
		return current + r - R;
	}
	return current + d - R + r;
}
ll prev_mod(ll current, ll d, ll r){
	ll R = current % d;
	if(R > r){
		return current - R + r;
	}
	return current - d + r - R;
}
namespace sub2{
	void solve(){
		ll cnt_cycle = A / __gcd(A, B + 1), init_cnt = (prev_mod(r[0], B, l[0] % B) - l[0]) / B + 1;
		if(l[0] % B < r[0] % B){
			cout << min(init_cnt, cnt_cycle) * (r[0] % B - l[0] % B + 1) + min(init_cnt - 1, cnt_cycle) * (B - r[0] % B - 1 + l[0] % B);
		}
		else{
			cout << min(init_cnt, cnt_cycle) * (B - l[0] % B + r[0] % B + 1) + min(init_cnt - 1, cnt_cycle) * (l[0] % B + B - r[0] % B - 1);
		}
	}
}
namespace sub4{
	void solve(){
		if(~A & 1){
			A >>= 1LL;
		}
		vector<pair<ll, ll>>range;
		for(int i = 0; i < n; i++){
			if(r[i] - l[i] + 1 >= A){
				return void(cout << A);
			}
			if((l[i] %= A) <= (r[i] %= A)){
				range.emplace_back(l[i], r[i]);
			}
			else{
				range.emplace_back(l[i], A - 1);
				range.emplace_back(0, r[i]);
			}
		}
		sort(range.begin(), range.end());
		ll ans = range[0].second - range[0].first + 1, pre = range[0].second;
		for(int i = 1; i < range.size(); i++){
			if(range[i].second > pre){
				ans += range[i].second - max(range[i].first, pre + 1) + 1;
				pre = range[i].second;
			}
		}
		cout << ans;
	}
}
namespace sub35678{
	void solve(){
		map<ll, int>cnt;
		if(INF / A < (B + 1) / __gcd(A, B + 1)){
			return void(cout << S);
		}
		ll cyc = A / __gcd(A, B + 1) * B;
		vector<pair<ll, ll>>range;
		for(int i = 0; i < n; i++){
			if(r[i] - l[i] + 1 >= cyc){
				return void(cout << cyc);
			}
			if((l[i] %= cyc) <= (r[i] %= cyc)){
				range.emplace_back(l[i], r[i]);
			}
			else{
				range.emplace_back(l[i], cyc - 1);
				range.emplace_back(0, r[i]);
			}
		}
		sort(range.begin(), range.end());
		ll ans = range[0].second - range[0].first + 1, pre = range[0].second;
		for(int i = 1; i < range.size(); i++){
			if(range[i].second > pre){
				ans += range[i].second - max(range[i].first, pre + 1) + 1;
				pre = range[i].second;
			}
		}
		cout << ans;
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n >> A >> B;
	for(int i = 0; i < n; i++){
		cin >> l[i] >> r[i];
		S += r[i] - l[i] + 1;
	}
	if(S <= 1000000){
		sub1::solve();
	}
	else if(n == 1){
		sub2::solve();
	}
	else if(B == 1){
		sub4::solve();
	}
	else{
		sub35678::solve();
	}
}

Compilation message

strange_device.cpp: In function 'void sub4::solve()':
strange_device.cpp:65:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |   for(int i = 1; i < range.size(); i++){
      |                  ~~^~~~~~~~~~~~~~
strange_device.cpp: In function 'void sub35678::solve()':
strange_device.cpp:96:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |   for(int i = 1; i < range.size(); i++){
      |                  ~~^~~~~~~~~~~~~~
strange_device.cpp: In function 'int main()':
strange_device.cpp:108:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |   freopen(taskname".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 39 ms 14508 KB Output is correct
3 Correct 66 ms 20204 KB Output is correct
4 Correct 3 ms 2904 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 2 ms 2648 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 7 ms 3164 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2556 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 35 ms 9044 KB Output is correct
16 Correct 22 ms 8796 KB Output is correct
17 Correct 43 ms 12948 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2404 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 113 ms 34388 KB Output is correct
3 Correct 147 ms 34644 KB Output is correct
4 Correct 123 ms 32728 KB Output is correct
5 Correct 232 ms 33472 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 342 ms 32984 KB Output is correct
3 Correct 324 ms 34024 KB Output is correct
4 Correct 334 ms 33004 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 342 ms 32984 KB Output is correct
3 Correct 324 ms 34024 KB Output is correct
4 Correct 334 ms 33004 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 355 ms 34120 KB Output is correct
7 Correct 338 ms 71548 KB Output is correct
8 Correct 368 ms 69804 KB Output is correct
9 Correct 378 ms 71000 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 342 ms 32984 KB Output is correct
3 Correct 324 ms 34024 KB Output is correct
4 Correct 334 ms 33004 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 34 ms 8952 KB Output is correct
7 Correct 33 ms 12496 KB Output is correct
8 Correct 41 ms 12636 KB Output is correct
9 Correct 45 ms 12480 KB Output is correct
10 Correct 32 ms 12692 KB Output is correct
11 Correct 38 ms 12876 KB Output is correct
12 Correct 32 ms 12652 KB Output is correct
13 Correct 39 ms 12632 KB Output is correct
14 Correct 34 ms 12612 KB Output is correct
15 Correct 41 ms 12648 KB Output is correct
16 Correct 33 ms 12512 KB Output is correct
17 Correct 37 ms 12752 KB Output is correct
18 Correct 378 ms 69776 KB Output is correct
19 Correct 338 ms 70388 KB Output is correct
20 Correct 374 ms 70524 KB Output is correct
21 Correct 40 ms 13028 KB Output is correct
22 Correct 40 ms 12500 KB Output is correct
23 Correct 115 ms 32728 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 35 ms 11260 KB Output is correct
3 Correct 35 ms 12664 KB Output is correct
4 Correct 396 ms 70204 KB Output is correct
5 Correct 45 ms 12752 KB Output is correct
6 Correct 39 ms 12768 KB Output is correct
7 Correct 43 ms 12760 KB Output is correct
8 Correct 42 ms 12648 KB Output is correct
9 Correct 42 ms 12496 KB Output is correct
10 Correct 39 ms 12632 KB Output is correct
11 Correct 39 ms 12624 KB Output is correct
12 Correct 37 ms 12512 KB Output is correct
13 Correct 39 ms 12500 KB Output is correct
14 Correct 381 ms 70512 KB Output is correct
15 Correct 42 ms 12760 KB Output is correct
16 Correct 364 ms 70604 KB Output is correct
17 Correct 347 ms 70728 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 39 ms 14508 KB Output is correct
3 Correct 66 ms 20204 KB Output is correct
4 Correct 3 ms 2904 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 2 ms 2648 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 7 ms 3164 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2556 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 35 ms 9044 KB Output is correct
16 Correct 22 ms 8796 KB Output is correct
17 Correct 43 ms 12948 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2404 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 113 ms 34388 KB Output is correct
26 Correct 147 ms 34644 KB Output is correct
27 Correct 123 ms 32728 KB Output is correct
28 Correct 232 ms 33472 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 342 ms 32984 KB Output is correct
31 Correct 324 ms 34024 KB Output is correct
32 Correct 334 ms 33004 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 355 ms 34120 KB Output is correct
35 Correct 338 ms 71548 KB Output is correct
36 Correct 368 ms 69804 KB Output is correct
37 Correct 378 ms 71000 KB Output is correct
38 Correct 1 ms 2392 KB Output is correct
39 Correct 34 ms 8952 KB Output is correct
40 Correct 33 ms 12496 KB Output is correct
41 Correct 41 ms 12636 KB Output is correct
42 Correct 45 ms 12480 KB Output is correct
43 Correct 32 ms 12692 KB Output is correct
44 Correct 38 ms 12876 KB Output is correct
45 Correct 32 ms 12652 KB Output is correct
46 Correct 39 ms 12632 KB Output is correct
47 Correct 34 ms 12612 KB Output is correct
48 Correct 41 ms 12648 KB Output is correct
49 Correct 33 ms 12512 KB Output is correct
50 Correct 37 ms 12752 KB Output is correct
51 Correct 378 ms 69776 KB Output is correct
52 Correct 338 ms 70388 KB Output is correct
53 Correct 374 ms 70524 KB Output is correct
54 Correct 40 ms 13028 KB Output is correct
55 Correct 40 ms 12500 KB Output is correct
56 Correct 115 ms 32728 KB Output is correct
57 Correct 1 ms 2396 KB Output is correct
58 Correct 35 ms 11260 KB Output is correct
59 Correct 35 ms 12664 KB Output is correct
60 Correct 396 ms 70204 KB Output is correct
61 Correct 45 ms 12752 KB Output is correct
62 Correct 39 ms 12768 KB Output is correct
63 Correct 43 ms 12760 KB Output is correct
64 Correct 42 ms 12648 KB Output is correct
65 Correct 42 ms 12496 KB Output is correct
66 Correct 39 ms 12632 KB Output is correct
67 Correct 39 ms 12624 KB Output is correct
68 Correct 37 ms 12512 KB Output is correct
69 Correct 39 ms 12500 KB Output is correct
70 Correct 381 ms 70512 KB Output is correct
71 Correct 42 ms 12760 KB Output is correct
72 Correct 364 ms 70604 KB Output is correct
73 Correct 347 ms 70728 KB Output is correct
74 Correct 1 ms 2396 KB Output is correct
75 Correct 1 ms 2396 KB Output is correct
76 Correct 1 ms 2396 KB Output is correct
77 Correct 1 ms 2508 KB Output is correct
78 Correct 1 ms 2396 KB Output is correct
79 Correct 4 ms 3164 KB Output is correct
80 Correct 438 ms 70492 KB Output is correct
81 Correct 439 ms 70592 KB Output is correct
82 Correct 395 ms 70432 KB Output is correct
83 Correct 363 ms 70496 KB Output is correct
84 Correct 356 ms 70516 KB Output is correct
85 Correct 350 ms 71832 KB Output is correct
86 Correct 93 ms 33476 KB Output is correct
87 Correct 1 ms 2396 KB Output is correct