Submission #523962

#	Time	Username	Problem	Language	Result	Execution time	Memory
523962		Koosha_mv	이상한 기계 (APIO19_strange_device)	C++14	100 / 100	485 ms	53304 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<(x.F)<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
#define int ll

const int N=1e6+99,inf=1e18+99;

int n,A,B,mod;
ll ans;
vector<pair<int,int> > v;

void find(){
	__int128	a=A,b=B,INF=inf;
	a=a/__gcd(a,b+1);
	mod=min(INF,a*b);
	//eror(mod);
}

main(){
	ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
	cin>>n>>A>>B;
	find();
	f(i,0,n){
		int l,r;
		cin>>l>>r;
		if(l/mod+1<r/mod){
			cout<<mod;
			exit(0);
		}
		if(l/mod==r/mod){
			v.pb(mp(l%mod,r%mod));
		}
		else{
			v.pb(mp(l%mod,mod-1));
			v.pb(mp(0,r%mod));
		}
	}
	sort(all(v));
	int mx=-1;
	f(i,0,v.size()){
		//erorp(v[i]);
		ans+=max(0ll,v[i].F-mx-1);
		maxm(mx,v[i].S);
	}
	ans+=mod-mx-1;
	cout<<mod-ans;
}

Compilation message (stderr)

strange_device.cpp:37:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   37 | main(){
      | ^~~~
strange_device.cpp: In function 'int main()':
strange_device.cpp:8:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   58 |  f(i,0,v.size()){
      |    ~~~~~~~~~~~~                
strange_device.cpp:58:2: note: in expansion of macro 'f'
   58 |  f(i,0,v.size()){
      |  ^

• 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