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Submission #448190

# Submission time Handle Problem Language Result Execution time Memory
448190 2021-07-29T08:25:07 Z Vladithur Strange Device (APIO19_strange_device) C++17
10 / 100
 764 ms 37316 KB 
//#pragma GCC optimize ("Ofast")
//#pragma GCC target("avx2")
//#pragma GCC optimize("unroll-loops")
//#include <x86intrin.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#include <bits/stdc++.h>

#define PI 3.141592653589793L
#define FAST ios::sync_with_stdio(false); cin.tie(NULL);
// Use for file I/O;
#define FIN string _fname = "input"; \
			string _is = _fname + ".in", _os = _fname + ".out"; \
			freopen(_is.c_str(), "r", stdin); \
			freopen(_os.c_str(), "w", stdout);

#define FIN2 freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);
#define RINIT mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

#define all(x) (x).begin(), (x).end()
#define allr(x) (x).rbegin(), (x).rend()
#define gsize(x) (int)((x).size())

using namespace std;
//using namespace __gnu_pbds;
//typedef gp_hash_table<int, int, hash<int>> ht;

const char nl = '\n';

typedef long long ll;
typedef long double ld;
// typedef unsigned int uint;
typedef unsigned long long ull;

const ll inf = 1e9 + 10;
const ll inf2 = 1e18 + 99LL;
const ld inf3 = 1e17;
const ll mod = 1e9+7, mod2 = 998244353;
const ld eps = 1e-9;
const bool local = false;

//RINIT;
const int logn = 21, maxn = 1000000, maxm = 100000, maxn2 = 3;	

int main() {
	FAST;
	
	int n;
	cin >> n;
	ll ta, tb;
	cin >> ta >> tb;
	//auto g = gcd(ta, tb);
	//ta /= g; tb /= g;
	//cout << ta << ' ' << tb << ' ' << tn << nl;
	__int128 a = ta, b = tb;
	//a /= g;
	//b /= g;
	__int128 tn = a * b;
	
	vector<pair<ll, ll>> segs;
	while (n--) {
		ll l, r;
		cin >> l >> r;
		
		if (r - l + 1 >= tn) {
			segs.emplace_back(0, 1);
			segs.emplace_back(tn, -1);
		} else {
			l %= tn;
			r %= tn;
			if (l <= r) {
				segs.emplace_back(l, 1);
				segs.emplace_back(r + 1, -1);
			} else {
				segs.emplace_back(0, 1);
				segs.emplace_back(r + 1, -1);
				segs.emplace_back(l, 1);
				segs.emplace_back(tn, -1);
			}
		}
	}
	
	sort(all(segs));
	ll ans = 0, ti = 0, px = -1, ct = 0;
	while (ti < gsize(segs)) {
		ll tx = segs[ti].first;
		if (ct) ans += tx - px;
		px = tx;
		while (ti < gsize(segs) && segs[ti].first == tx) {
			ct += segs[ti].second;
			ti++;
		}
	}
	
	cout << ans << nl;
}

// © Benq 
/* stuff you should look for
	* int overflow, array bounds	
	* special cases (n=1?)
	* do smth instead of nothing and stay organized
	* WRITE STUFF DOWN
	* DON'T GET STUCK ON ONE APPROACH
*/

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 6 ms 976 KB Output is correct
3 Correct 6 ms 848 KB Output is correct
4 Incorrect 0 ms 204 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 413 ms 33276 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 618 ms 33232 KB Output is correct
3 Incorrect 557 ms 36004 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 618 ms 33232 KB Output is correct
3 Incorrect 557 ms 36004 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 618 ms 33232 KB Output is correct
3 Incorrect 557 ms 36004 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 68 ms 7196 KB Output is correct
3 Correct 69 ms 7196 KB Output is correct
4 Correct 764 ms 37288 KB Output is correct
5 Correct 67 ms 7176 KB Output is correct
6 Correct 70 ms 7256 KB Output is correct
7 Correct 67 ms 7180 KB Output is correct
8 Correct 69 ms 7224 KB Output is correct
9 Correct 66 ms 7188 KB Output is correct
10 Correct 70 ms 7212 KB Output is correct
11 Correct 66 ms 7220 KB Output is correct
12 Correct 59 ms 7220 KB Output is correct
13 Correct 70 ms 7200 KB Output is correct
14 Correct 723 ms 37316 KB Output is correct
15 Incorrect 71 ms 7228 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 6 ms 976 KB Output is correct
3 Correct 6 ms 848 KB Output is correct
4 Incorrect 0 ms 204 KB Output isn't correct
5 Halted 0 ms 0 KB -