Submission #295794

#	Time	Username	Problem	Language	Result	Execution time	Memory
295794		Gajowy	Remittance (JOI19_remittance)	C++14	100 / 100	259 ms	35320 KiB

remittance

#pragma GCC optimize("Ofast")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#define mp make_pair
#define eb emplace_back
#define pb push_back
#define e1 first
#define e2 second
#define int int_fast32_t
#define uint uint_fast64_t
#define ll int_fast64_t
#define ull uint_fast64_t
#define int16 int_fast16_t
#define uint16 uint_fast16_t
#define int32 int_fast32_t
#define uint32 uint_fast32_t
#define int64 int_fast64_t
#define uint64 uint_fast64_t
#define ld long double
#define float long double
#define size(x) (int)x.size()
#define satori int testCases; cin>>testCases; while(testCases--)
#define fastio ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define all(r) begin(r),end(r)
#define rall(r) rbegin(r),rend(r)
#define time chrono::high_resolution_clock().now().time_since_epoch().count()
#define elapsed(__begin,__end) (__end-__begin)/CLOCKS_PER_SEC
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
float pi=3.14159265358979323846;

const int MAXN=1e6+10;

ll a[MAXN],b[MAXN],x;

int32_t main()
{
	fastio;
	int n;
	cin>>n;
	for(int i=0;i<n;i++)
		cin>>a[i]>>b[i];
	while(true)
	{
		for(int i=0;i<n;i++)
			if(a[i]>b[i]&&a[i]>1ll)
			{
				
				x=(a[i]-b[i]+1ll)/2ll;
				if(2ll*x>a[i])
					x--;
				a[(i+1)%n]+=x,a[i]-=2ll*x;
			}
		bool over=false;
		for(int i=0;i<n;i++)
			if(a[i]>b[i]&&a[i]>1)
				over=true;
		if(!over)
			break;
	}
	for(int i=0;i<n;i++)
		if(a[i]!=b[i])
		{
			cout<<"No\n";
			return 0;
		}
	cout<<"Yes\n";
}

Compilation message (stderr)

remittance.cpp:2: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
remittance.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45