oj.uz

Submission #232630

# Submission time Handle Problem Language Result Execution time Memory
232630 2020-05-17T17:35:08 Z limabeans Strange Device (APIO19_strange_device) C++17
5 / 100
 580 ms 47572 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);
	if (tmp > 1e18/y) return (ll)1e18 + 1;
	return tmp*y;
    };

    ll lcm = safe_lcm(a, b + 1);

    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 %= (a*b);
	v[i].second %= (a*b);
	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,a*b});
	    cv.push_back({1,v[i].second});
	}
    }




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

    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 10 ms 896 KB Output is correct
3 Correct 9 ms 896 KB Output is correct
4 Incorrect 4 ms 384 KB Output isn't correct
5 Halted 0 ms 0 KB -

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 5 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 392 ms 47428 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 545 ms 47448 KB Output is correct
3 Incorrect 532 ms 47572 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 545 ms 47448 KB Output is correct
3 Incorrect 532 ms 47572 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 545 ms 47448 KB Output is correct
3 Incorrect 532 ms 47572 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 60 ms 5228 KB Output is correct
3 Correct 63 ms 5100 KB Output is correct
4 Correct 580 ms 47548 KB Output is correct
5 Correct 61 ms 5100 KB Output is correct
6 Correct 59 ms 5104 KB Output is correct
7 Correct 58 ms 5228 KB Output is correct
8 Correct 59 ms 5100 KB Output is correct
9 Correct 58 ms 5100 KB Output is correct
10 Correct 58 ms 5100 KB Output is correct
11 Correct 58 ms 5100 KB Output is correct
12 Correct 53 ms 5100 KB Output is correct
13 Correct 57 ms 5228 KB Output is correct
14 Correct 571 ms 47556 KB Output is correct
15 Incorrect 60 ms 5100 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 10 ms 896 KB Output is correct
3 Correct 9 ms 896 KB Output is correct
4 Incorrect 4 ms 384 KB Output isn't correct
5 Halted 0 ms 0 KB -