Submission #1091876

#	Time	Username	Problem	Language	Result	Execution time	Memory
1091876		mispertion	Strange Device (APIO19_strange_device)	C++17	35 / 100	585 ms	100436 KiB

strange_device

#include<bits/stdc++.h>

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef long long ll;
#define int ll
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define pb push_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define mispertion ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define F first
#define S second
#define getlast(s) (*s.rbegin())
#define debg cout << "OK\n"

const ld PI = 3.1415926535;
const int N = 1e6 + 1;
const int M = 50 + 1;
const int mod = 1e9+7;
const int infi = INT_MAX;
const ll infl = LLONG_MAX;
const int P = 31;

int mult(int a, int b) {
    return a * 1LL * b % mod;
}

int sum(int a, int b) { 
    if (a + b < 0)
        return a + b + mod;
    if (a + b >= mod)
        return a + b - mod;
    return a + b;
}

ll binpow(ll a, ll n) {
    if (n == 0)
        return 1;
    if (n % 2 == 1) {
        return binpow(a, n - 1) * a % mod;
    } else {
        ll b = binpow(a, n / 2);
        return b * b % mod;
    }
}

int n, A, B;
map<int, int> mp;

void solve(){
    cin >> n >> A >> B;
    int ccl = A / __gcd(A, B + 1) * B;
    for(int i = 1; i <= n; i++){
        int l, r;
        cin >> l >> r;
        if(r - l + 1 >= ccl){
            mp[0]++;
            mp[ccl]--;
        }else{
            if(l % ccl <= r % ccl){
                mp[l % ccl]++;
                mp[r % ccl + 1]--;
            }else{
                mp[l % ccl]++;
                mp[ccl]--;
                mp[0]++;
                mp[r % ccl + 1]--;
            }
        }
    }
    int cur = 0, ans = 0;
    for(auto it = mp.begin(); it != (--mp.end()); it++){
        auto it1 = it;
        it1++;
        cur += it->S;
        if(cur != 0)
            ans += (it1->F - it->F);
    }
    cout << ans << '\n';
}   

signed main() {
    mispertion;
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30