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Submission #984372

# Submission time Handle Problem Language Result Execution time Memory
984372 2024-05-16T15:09:19 Z SmuggingSpun Strange Device (APIO19_strange_device) C++14
15 / 100
 319 ms 71364 KB 
#include<bits/stdc++.h>
#define taskname "A"
using namespace std;
typedef long long ll;
const int lim = 1e6 + 5;
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(r[i], A - 1);
				range.emplace_back(0, l[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;
			}
		}
		return void(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();
	}
}

Compilation message

strange_device.cpp: In function 'void sub4::solve()':
strange_device.cpp:64:20: 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]
   64 |   for(int i = 1; i < range.size(); i++){
      |                  ~~^~~~~~~~~~~~~~
strange_device.cpp: In function 'int main()':
strange_device.cpp:76:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |   freopen(taskname".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2904 KB Output is correct
2 Correct 38 ms 14864 KB Output is correct
3 Correct 59 ms 20412 KB Output is correct
4 Correct 2 ms 2908 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 7 ms 3160 KB Output is correct
10 Correct 1 ms 2516 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 33 ms 8976 KB Output is correct
16 Correct 22 ms 9368 KB Output is correct
17 Correct 44 ms 14940 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 2508 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2508 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct

Subtask #3
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 114 ms 34520 KB Output is correct
3 Correct 131 ms 34296 KB Output is correct
4 Correct 111 ms 32604 KB Output is correct
5 Incorrect 171 ms 28796 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 319 ms 53064 KB Output is correct
3 Incorrect 301 ms 71364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 319 ms 53064 KB Output is correct
3 Incorrect 301 ms 71364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 319 ms 53064 KB Output is correct
3 Incorrect 301 ms 71364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 25 ms 8664 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2904 KB Output is correct
2 Correct 38 ms 14864 KB Output is correct
3 Correct 59 ms 20412 KB Output is correct
4 Correct 2 ms 2908 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 7 ms 3160 KB Output is correct
10 Correct 1 ms 2516 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 33 ms 8976 KB Output is correct
16 Correct 22 ms 9368 KB Output is correct
17 Correct 44 ms 14940 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 2508 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2508 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 114 ms 34520 KB Output is correct
26 Correct 131 ms 34296 KB Output is correct
27 Correct 111 ms 32604 KB Output is correct
28 Incorrect 171 ms 28796 KB Output isn't correct
29 Halted 0 ms 0 KB -