Submission #568307

#	Time	Username	Problem	Language	Result	Execution time	Memory
568307		Baytoro	Strange Device (APIO19_strange_device)	C++17	40 / 100	726 ms	62956 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
#define Baytoro_Mayrambekov void solve()
#define ios ios::sync_with_stdio(false); cin.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define int long long
#define endl '\n'
const int INF=1e9;
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
int binpow(int a,int n){
	if(n==0)
		return 1;
	if(n%2==1)
		return binpow(a, n-1)*a;
	else{
		int b=binpow(a, n/2);
		return b*b;
	}
}
int a,b,c,n,m,i,j,k,x,y,cnt=0,sum=0,res=0;
Baytoro_Mayrambekov{
	cin>>n>>a>>b;
	int mx=a/(__gcd(a,b+1));
	if(mx>INF)
		mx=INF;
	else
		mx*=b;
	bool check=1;
	set<pair<int,int>> st;
	for(i=0;i<n;i++){
		int l,r;
		cin>>l>>r;
		if(r-l+1>=mx && check){
			cout<<mx<<endl;
			check=0;
		}
		if(!check)
			continue;
		l%=mx;
		r%=mx;
		if(l<=r){
			st.insert({l,r});
		}
		else{
			st.insert({l,mx-1});
			st.insert({0,r});
		}
	}
	if(!check){
		return;
	}
	res=0;
	int x=-1;
	for(auto it: st){
		if(x<it.fr)
			res+=it.sc-it.fr+1;
		else if(x<it.sc)
			res+=it.sc-x;
		x=max(x,it.sc);
	}
	cout<<res<<endl;
}
main(){
	ios;
	int T=1;
	//cin>>T;
	while(T--){
		solve();
	}
}

Compilation message (stderr)

strange_device.cpp:70:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   70 | main(){
      | ^~~~
strange_device.cpp: In function 'void fopn(std::string)':
strange_device.cpp:14:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:15:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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