제출 #932168

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
932168		Baizho	이상한 기계 (APIO19_strange_device)	C++14	15 / 100	6480 ms	524288 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
  
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
 
// #pragma GCC optimize("Ofast,unroll-loops,fast-math")
// #pragma GCC target("popcnt")
 
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll,ll> pll;
 
#define sz size()
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define pb push_back
 
const int mod = ll(1e9)+7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in c++ its -1 but its suppose to be 10^9+6
const ll MOD = 998244353;  // (a%mod)*(binpow(b,mod-2,mod) = (a/b)%mod
const int N = ll(2e3)+100;
const int M = ll(2e5) + 100;
const long long inf = 5e18;
const long double eps = 1e-15L;
 
ll lcm(ll a, ll b) { return (a / __gcd(a,b))*b; }
 
ll binpow(ll a, ll b, ll m) { ll res=1; a %= m; while(b>0){ if(b&1)res=(res * a) % m; a=(a * a) % m; b/=2; } return res%m;}
 
void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
 
#define int ll

void Baizho() {
	int n, a, b; cin>>n>>a>>b;
	int x = 0, y = 0, siz = 0;
	for(int i = 0; i <= 1e7; i ++) {
		x = (i + (i / b)) % a;
		y = i % b;
//		cout<<i<<" "<<x<<" "<<y<<endl; 
		if(i > 0 && x == 0 && y == 0) break;
		siz ++;
	}
	set<int> st;
	for(int i = 0; i < siz; i ++) st.insert(i);
	while(n --) {
		int l, r; cin>>l>>r;
		l %= siz; r %= siz;
		if(l <= r) {
			auto it = st.lower_bound(l);
			vector<int> vec;
			while(it != st.end() && *it <= r) {
//				cout<<*it<<" ";
				vec.pb(*it);
				it ++;
			}
			for(auto x : vec) st.erase(x);
		} else {
			// l ... siz - 1, 0 ... r
			while(*st.rbegin() >= l) st.erase(--st.end());
			while(*st.begin() <= r) st.erase(st.begin());
		}
	}
	cout<<siz - st.size();
}
 
signed main() {		
// 	Freopen("nondec");
    ios_base::sync_with_stdio(false);   
    cin.tie(0);cout.tie(0); 
//   	precalc();
   	
    int ttt = 1;
//    cin>>ttt;
 
    for(int i=1; i<=ttt; i++) {Baizho(); }
}

컴파일 시 표준 에러 (stderr) 메시지

strange_device.cpp: In function 'void Freopen(std::string)':
strange_device.cpp:35:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:35:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                                                                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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