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Submission #568694

# Submission time Handle Problem Language Result Execution time Memory
568694 2022-05-26T05:27:07 Z Zanite Strange Device (APIO19_strange_device) C++17
100 / 100
 891 ms 100268 KB 
// You can't change other people; you can only change yourself.

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

// Pragmas
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

// Namespaces
#define yume using
#define wo namespace
#define kanaeyo std
#define nazotte __gnu_pbds
yume wo kanaeyo;
yume wo nazotte;

// Data types
using i8	= __int128;
using ll	= long long;
using si	= short int;
using ld	= long double;

// Pairs
using pi8	= pair<i8, i8>;
using pll	= pair<ll, ll>;
using pii	= pair<int, int>;
using psi	= pair<si, si>;
using pld	= pair<ld, ld>;
#define fi first
#define se second

// PBDS
template<typename T>
using ordered_set	= tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

// Quick macro functions
#define sqr(x) ((x)*(x))
#define pow2(x) (1ll << (x))
#define debug(x) cout << #x << " = " << (x) << '\n'
#define debugV(x, a) cout << #x << "[" << (a) << "] = " << (x[a]) << '\n'

// Check min and max
template<typename T> void chmin(T &a, T b) {a = min(a, b);}
template<typename T> void chmax(T &a, T b) {a = max(a, b);}
 
// Modular arithmetic
template<typename T> void maddto(T &a, T b, T mod) {a += b; a %= mod;}
template<typename T> void msubto(T &a, T b, T mod) {a -= b; while (a < 0) a += mod; a %= mod;}
template<typename T> void mmulto(T &a, T b, T mod) {a *= b; a %= mod;}
 
template<typename T> T madd(T a, T b, T mod) {a += b; a %= mod; return a;}
template<typename T> T msub(T a, T b, T mod) {a -= b; while (a < 0) a += mod; return a;}
template<typename T> T mmul(T a, T b, T mod) {a *= b; a %= mod; return a;}

// Constants
const ll ModA	= 998244353;
const ll ModC	= 1e9 + 7;
const ll INF	= 1e18;
const ll iINF	= 1e9;
const ld EPS	= 1e-9;
const ld iEPS	= 1e-6;

i8 gcd(i8 x, i8 y) {
	if (!y) return x;
	return gcd(y, x % y);
}

ll n, A, B;
vector<pi8> segments;

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);

	scanf("%lld %lld %lld", &n, &A, &B);
	i8 _A = A, _B = B;

	i8 _loop = ((i8)1 * _A * _B) / gcd(_A, _B+1);
	ll loop;
	if (_loop >= INF) {
		loop = INF;
	} else {
		loop = _loop;
	}

	for (ll l, r, i = 1; i <= n; i++) {
		scanf("%lld %lld", &l, &r);

		if (r - l + 1 >= loop) {
			printf("%lld\n", loop);
			return 0;
		} else {
			ll lx = l % loop, rx = r % loop;
			if (lx <= rx) {
				segments.push_back({lx, 1});
				segments.push_back({rx+1, -1});
			} else {
				segments.push_back({0, 1});
				segments.push_back({rx+1, -1});

				segments.push_back({lx, 1});
				segments.push_back({loop, -1});
			}
		}
	}

	sort(segments.begin(), segments.end());
	ll ans = 0, depth = 0, lastOpen = -1;
	for (auto &[pos, d] : segments) {
		if (depth == 0) {
			lastOpen = pos;
		}
		depth += d;
		if (depth == 0) {
			ans += pos - lastOpen;
		}
	}
	printf("%lld\n", ans);
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:77:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |  scanf("%lld %lld %lld", &n, &A, &B);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:89:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |   scanf("%lld %lld", &l, &r);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 10 ms 1416 KB Output is correct
3 Correct 7 ms 1380 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 7 ms 1492 KB Output is correct
17 Correct 91 ms 8664 KB Output is correct
18 Correct 1 ms 212 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 499 ms 66084 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 657 ms 66064 KB Output is correct
3 Correct 707 ms 66052 KB Output is correct
4 Correct 694 ms 66032 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 657 ms 66064 KB Output is correct
3 Correct 707 ms 66052 KB Output is correct
4 Correct 694 ms 66032 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 685 ms 66008 KB Output is correct
7 Correct 696 ms 66000 KB Output is correct
8 Correct 698 ms 66140 KB Output is correct
9 Correct 821 ms 66184 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 657 ms 66064 KB Output is correct
3 Correct 707 ms 66052 KB Output is correct
4 Correct 694 ms 66032 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 57 ms 8648 KB Output is correct
7 Correct 71 ms 8568 KB Output is correct
8 Correct 80 ms 8640 KB Output is correct
9 Correct 70 ms 8636 KB Output is correct
10 Correct 57 ms 8584 KB Output is correct
11 Correct 61 ms 8636 KB Output is correct
12 Correct 60 ms 8552 KB Output is correct
13 Correct 77 ms 8592 KB Output is correct
14 Correct 70 ms 8544 KB Output is correct
15 Correct 82 ms 8560 KB Output is correct
16 Correct 70 ms 8640 KB Output is correct
17 Correct 60 ms 8588 KB Output is correct
18 Correct 698 ms 66056 KB Output is correct
19 Correct 616 ms 66060 KB Output is correct
20 Correct 825 ms 66072 KB Output is correct
21 Correct 80 ms 8652 KB Output is correct
22 Correct 66 ms 8648 KB Output is correct
23 Correct 195 ms 33280 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 66 ms 8656 KB Output is correct
3 Correct 88 ms 8580 KB Output is correct
4 Correct 891 ms 66004 KB Output is correct
5 Correct 71 ms 8640 KB Output is correct
6 Correct 85 ms 8616 KB Output is correct
7 Correct 82 ms 8580 KB Output is correct
8 Correct 73 ms 8644 KB Output is correct
9 Correct 76 ms 8552 KB Output is correct
10 Correct 76 ms 8628 KB Output is correct
11 Correct 67 ms 8576 KB Output is correct
12 Correct 60 ms 8604 KB Output is correct
13 Correct 86 ms 8636 KB Output is correct
14 Correct 849 ms 66036 KB Output is correct
15 Correct 88 ms 8680 KB Output is correct
16 Correct 613 ms 66092 KB Output is correct
17 Correct 654 ms 66000 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 10 ms 1416 KB Output is correct
3 Correct 7 ms 1380 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 7 ms 1492 KB Output is correct
17 Correct 91 ms 8664 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 320 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 499 ms 66084 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 657 ms 66064 KB Output is correct
31 Correct 707 ms 66052 KB Output is correct
32 Correct 694 ms 66032 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 685 ms 66008 KB Output is correct
35 Correct 696 ms 66000 KB Output is correct
36 Correct 698 ms 66140 KB Output is correct
37 Correct 821 ms 66184 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 57 ms 8648 KB Output is correct
40 Correct 71 ms 8568 KB Output is correct
41 Correct 80 ms 8640 KB Output is correct
42 Correct 70 ms 8636 KB Output is correct
43 Correct 57 ms 8584 KB Output is correct
44 Correct 61 ms 8636 KB Output is correct
45 Correct 60 ms 8552 KB Output is correct
46 Correct 77 ms 8592 KB Output is correct
47 Correct 70 ms 8544 KB Output is correct
48 Correct 82 ms 8560 KB Output is correct
49 Correct 70 ms 8640 KB Output is correct
50 Correct 60 ms 8588 KB Output is correct
51 Correct 698 ms 66056 KB Output is correct
52 Correct 616 ms 66060 KB Output is correct
53 Correct 825 ms 66072 KB Output is correct
54 Correct 80 ms 8652 KB Output is correct
55 Correct 66 ms 8648 KB Output is correct
56 Correct 195 ms 33280 KB Output is correct
57 Correct 0 ms 212 KB Output is correct
58 Correct 66 ms 8656 KB Output is correct
59 Correct 88 ms 8580 KB Output is correct
60 Correct 891 ms 66004 KB Output is correct
61 Correct 71 ms 8640 KB Output is correct
62 Correct 85 ms 8616 KB Output is correct
63 Correct 82 ms 8580 KB Output is correct
64 Correct 73 ms 8644 KB Output is correct
65 Correct 76 ms 8552 KB Output is correct
66 Correct 76 ms 8628 KB Output is correct
67 Correct 67 ms 8576 KB Output is correct
68 Correct 60 ms 8604 KB Output is correct
69 Correct 86 ms 8636 KB Output is correct
70 Correct 849 ms 66036 KB Output is correct
71 Correct 88 ms 8680 KB Output is correct
72 Correct 613 ms 66092 KB Output is correct
73 Correct 654 ms 66000 KB Output is correct
74 Correct 0 ms 212 KB Output is correct
75 Correct 1 ms 212 KB Output is correct
76 Correct 1 ms 212 KB Output is correct
77 Correct 1 ms 212 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 7 ms 1744 KB Output is correct
80 Correct 844 ms 100260 KB Output is correct
81 Correct 833 ms 100132 KB Output is correct
82 Correct 826 ms 100132 KB Output is correct
83 Correct 785 ms 100268 KB Output is correct
84 Correct 804 ms 100112 KB Output is correct
85 Correct 832 ms 100188 KB Output is correct
86 Correct 181 ms 43076 KB Output is correct
87 Correct 1 ms 212 KB Output is correct