Submission #1196940

#	Time	Username	Problem	Language	Result	Execution time	Memory
1196940		haitax511	Strange Device (APIO19_strange_device)	C++20	100 / 100	339 ms	32720 KiB

strange_device

// #include<bits/allocator.h>
// #pragma GCC optimize("Ofast,unroll-loops")
// #ifdef ONLINE_JUDGE
// #pragma GCC target("avx2,fma,bmi,bmi2,popcnt,lzcnt,tune=native")
// #endif
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
 
// VVI
#define fast                      \
  ios_base::sync_with_stdio(0); \
  cin.tie(0);
 
#define ll long long
#define SZ(a) (ll)a.size()
#define UNIQUE(a) (a).erase(unique(all(a)), (a).end())
#define mp make_pair
#define mem(a, b) memset(a, b, sizeof(a))
#define all(x) x.begin(), x.end()
 
//Printings & debugging
#define nn '\n'
#define Setpre(n) cout << fixed << setprecision(n)
#define deb(x) cout << #x << "=" << x << endl
#define deb2(x, y) cout << #x << "=" << x << "," << #y << "=" << y << endl
#define debug printf("I am here\n")
 
// CONSTANTS
#define md 10000007
#define PI acos(-1)
const  long double   EPS = 1e-9;
const ll N = 2e5 + 10;
const ll M = 1e9 + 7;
 
/// INLINE FUNCTIONS
inline ll GCD(ll a, ll b) { return b == 0 ? a : GCD(b, a % b); }
inline ll LCM(ll a, ll b) { return a * b / GCD(a, b); }
inline  long double   logb(ll base, ll num) { return ( long double  )log(num) / ( long double  )log(base); }
 
 
/// Data structures
typedef unsigned long long ull;
typedef pair<ll, ll> pll;
typedef vector<ll> vl;
typedef vector<pll> vpll;
typedef vector<vl> vvl;
template <typename T>
using PQ = priority_queue<T>;
template <typename T>
using QP = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T>
using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T, typename R>
using ordered_map = tree<T, R, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T, typename R>
using ordered_multimap = tree<T, R, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
namespace io{
  template<typename First, typename Second> ostream& operator << ( ostream &os, const pair<First, Second> &p ) { return os << p.first << " " << p.second; }
  template<typename First, typename Second> ostream& operator << ( ostream &os, const map<First, Second> &mp ) { for( auto it : mp ) { os << it << endl;  } return os; }
  template<typename First> ostream& operator << ( ostream &os, const vector<First> &v ) { bool space = false; for( First x : v ) { if( space ) os << " "; space = true; os << x; } return os; }
  template<typename First> ostream& operator << ( ostream &os, const set<First> &st ) { bool space = false; for( First x : st ) { if( space ) os << " "; space = true; os << x; } return os; }
  template<typename First> ostream& operator << ( ostream &os, const multiset<First> &st ) { bool space = false; for( First x : st ) { if( space ) os << " "; space = true; os << x; } return os; }
  template<typename First, typename Second> istream& operator >> ( istream &is, pair<First, Second> &p ) { return is >> p.first >> p.second; }
  template<typename First> istream& operator >> ( istream &is, vector<First> &v ) { for( First &x : v ) { is >> x; } return is; }
 
  long long fastread(){ char c; long long d = 1, x = 0; do c = getchar(); while( c == ' ' || c == '\n' ); if( c == '-' ) c = getchar(), d = -1; while( isdigit( c ) ){ x = x * 10 + c - '0'; c = getchar(); } return d * x; }
  static bool sep = false;
  using std::to_string;
  string to_string( bool x ){ return ( x ? "true" : "false" ); }
  string to_string( const string & s ){ return "\"" + s + "\""; }
  string to_string( const char * s ){ return "\"" + string( s ) + "\""; }
  string to_string ( const char & c ) { string s; s += c; return "\'" + s + "\'"; }
  template<typename Type> string to_string( vector<Type> );
  template<typename First, typename Second> string to_string( pair<First, Second> );
  template<typename Collection> string to_string( Collection );
  template<typename First, typename Second> string to_string( pair<First, Second> p ){ return "{" + to_string( p.first ) + ", " + to_string( p.second ) + "}"; }
  template<typename Type> string to_string( vector<Type> v ) { bool sep = false; string s = "["; for( Type x: v ){ if( sep ) s += ", "; sep = true; s += to_string( x ); } s += "]"; return s; }
  template<typename Collection> string to_string( Collection collection ) { bool sep = false; string s = "{"; for( auto x: collection ){ if( sep ) s += ", "; sep = true; s += to_string( x ); } s += "}"; return s; }
  void print() { cerr << endl; sep = false; }
  template <typename First, typename... Other> void print( First first, Other... other ) { if( sep ) cerr << " | "; sep = true; cerr << to_string( first ); print( other... ); }
} using namespace io;
const ll INF=1e15+500;
// ll mul(ll x) {return x==0 ? 1 : mul(x-1)*10;}
const ll MAXN=3e5+100;
const ll MOD=1e9+7;
#define p(i,n) for(ll i=0; i<n; i++)
#define rp(i,n) for(ll i=n-1; i>=0; i--)
#define grid_ll vector<vector<ll>>
#define grid_char vector<vector<char>>
void ADD(ll& c,ll a, ll b, ll m) {c = ((a % m) + (b % m)) % m;return;}
void MUL(ll& c,ll a, ll b, ll m) {c = ((a % m) * (b % m)) % m;}
void SUB(ll& c,ll a, ll b, ll m) {c = ((a % m) - (b % m) + m) % m;}
void MIN(ll& a, ll b) {a = min(a, b);}
void MAX(ll& a, ll b) {a = max(a, b);}
ll gcdExtended(ll a, ll b, ll *x, ll *y);
ll modInverse(ll b, ll m){ll x,y;ll g = gcdExtended(b, m, &x, &y);if (g != 1)return -1;return (x%m + m) % m;}
ll modDivide(ll a, ll b, ll m){a = a % m;ll inv = modInverse(b, m);return (inv * a) % m;}
ll gcdExtended(ll a, ll b, ll *x, ll *y){if (a == 0){*x = 0, *y = 1;return b;}ll x1, y1;ll gcd = gcdExtended(b%a, a, &x1, &y1);*x = y1 - (b/a) * x1;*y = x1;return gcd;}
#define f first
#define s second
signed main(){

    fast
    ll n; cin>>n; ll A,B; cin>>A>>B; 
    vector<pll> v(n); 
    for(ll i=0;i<n; i++) cin>>v[i].f>>v[i].s;
    ll flag=1; 
  
    ll x=(A)/__gcd(A,B+1); ll mn=2e18; 
    vector<pll> vals; 
    for(ll i=0; i<n; i++){
        if ((v[i].s-v[i].f+1)/x>=B){
            flag=0; 
        }
        else{
            if( v[i].s/x>=B) 
            {v[i].s%=x*B;} 
            if (v[i].f/x>=B)
            { v[i].f%=x*B; } 
            if( v[i].f>v[i].s) 
            {vals.push_back(mp(v[i].f,x*B-1LL));
            vals.push_back(mp(0LL,v[i].s)); 
  
            }
            else{
                vals.push_back(v[i]); 
            }
        }
        
        
    }
    if (flag==0) {cout<<x*B<<nn; return 0; } 
   
    sort(all(vals));
    ll covered=-1; ll ans=0; 
    for(ll i=0; i<vals.size(); i++){
        if( vals[i].s>covered) {ans+=vals[i].s-max(covered,vals[i].f-1); covered=vals[i].s;  
    }
    
    
    }
    cout<<ans<<nn; 
         
}

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