oj.uz

Submission #232698

# Submission time Handle Problem Language Result Execution time Memory
232698 2020-05-17T21:08:34 Z limabeans Strange Device (APIO19_strange_device) C++17
65 / 100
 592 ms 77508 KB 
#include <bits/stdc++.h>
using namespace std;

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl




typedef long long ll;
const ll mod = 1e9+7;
const int maxn = 1e6 + 5;



ll n, a, b;


ll getx(ll t) {
    return (t+t/b)%a;
}

ll gety(ll t) {
    return t%b;
}






ll merge(vector<pair<ll,ll>> v) {
    sort(v.begin(), v.end());
    // for (auto p: v) {
    // 	cout<<p.first<<" "<<p.second<<endl;
    // }
    
    ll res = 0;

    n = v.size();
    auto cur = v.front();
    for (int i=1; i<n; i++) {
	ll x=v[i].first;
	ll y=v[i].second;
	if (x>cur.second) {
	    res += cur.second-cur.first+1;
	    cur = v[i];
	} else {
	    cur.second=max(cur.second,y);
	}
    }
    res += cur.second-cur.first+1;
    return res;
}

vector<pair<ll,ll>> v;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);  cout.tie(0);

    cin>>n>>a>>b;

    v.resize(n);
    for (int i=0; i<n; i++) {
	cin>>v[i].first>>v[i].second;
    }


    auto safe_lcm = [](ll x, ll y) {
	ll tmp = x / __gcd(x,y+1);
	if (tmp > 1e18/y) return (ll)1e18 + 1;
	return tmp*y;
    };

    ll lcm = safe_lcm(a, b);

    if (lcm>1e18) {
	//merge intervals
	ll res = merge(v);
	out(res);
    }



    vector<pair<ll,ll>> cv;
    
    for (int i=0; i<n; i++) {
	v[i].first %= lcm;
	v[i].second %= lcm;
	if (v[i].second>=v[i].first) {
	    cv.push_back(v[i]);
	} else {
	    
	    assert(v[i].first>v[i].second);
	    
	    cv.push_back({v[i].first,lcm-1});
	    cv.push_back({0,v[i].second});
	}
    }




    ll ans = merge(cv);
    out(ans);  

    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 10 ms 1280 KB Output is correct
3 Correct 10 ms 1280 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 10 ms 1280 KB Output is correct
17 Correct 62 ms 8940 KB Output is correct
18 Correct 5 ms 384 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Incorrect 4 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 394 ms 48708 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 543 ms 49560 KB Output is correct
3 Correct 518 ms 49748 KB Output is correct
4 Correct 509 ms 67936 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 543 ms 49560 KB Output is correct
3 Correct 518 ms 49748 KB Output is correct
4 Correct 509 ms 67936 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 533 ms 67796 KB Output is correct
7 Correct 540 ms 67780 KB Output is correct
8 Correct 519 ms 67780 KB Output is correct
9 Correct 570 ms 67936 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 543 ms 49560 KB Output is correct
3 Correct 518 ms 49748 KB Output is correct
4 Correct 509 ms 67936 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 58 ms 8916 KB Output is correct
7 Correct 63 ms 8940 KB Output is correct
8 Correct 62 ms 8812 KB Output is correct
9 Correct 57 ms 8940 KB Output is correct
10 Correct 58 ms 8940 KB Output is correct
11 Correct 61 ms 8940 KB Output is correct
12 Correct 56 ms 8940 KB Output is correct
13 Correct 58 ms 8812 KB Output is correct
14 Correct 56 ms 8940 KB Output is correct
15 Correct 60 ms 8812 KB Output is correct
16 Correct 64 ms 8812 KB Output is correct
17 Correct 56 ms 8812 KB Output is correct
18 Correct 520 ms 67780 KB Output is correct
19 Correct 534 ms 67836 KB Output is correct
20 Correct 577 ms 67804 KB Output is correct
21 Correct 60 ms 8940 KB Output is correct
22 Correct 57 ms 8812 KB Output is correct
23 Correct 182 ms 29248 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 59 ms 8940 KB Output is correct
3 Correct 59 ms 8940 KB Output is correct
4 Correct 592 ms 49860 KB Output is correct
5 Correct 58 ms 8816 KB Output is correct
6 Correct 66 ms 8940 KB Output is correct
7 Correct 60 ms 8812 KB Output is correct
8 Correct 61 ms 8812 KB Output is correct
9 Correct 60 ms 8812 KB Output is correct
10 Correct 64 ms 8972 KB Output is correct
11 Correct 59 ms 8812 KB Output is correct
12 Correct 57 ms 8940 KB Output is correct
13 Correct 60 ms 8812 KB Output is correct
14 Correct 565 ms 49860 KB Output is correct
15 Correct 59 ms 8812 KB Output is correct
16 Correct 543 ms 77508 KB Output is correct
17 Correct 526 ms 68932 KB Output is correct
18 Correct 4 ms 384 KB Output is correct

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 10 ms 1280 KB Output is correct
3 Correct 10 ms 1280 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 10 ms 1280 KB Output is correct
17 Correct 62 ms 8940 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 4 ms 384 KB Output is correct
20 Incorrect 4 ms 384 KB Output isn't correct
21 Halted 0 ms 0 KB -