Submission #1189814

#	Time	Username	Problem	Language	Result	Execution time	Memory
1189814		thelegendary08	Remittance (JOI19_remittance)	C++17	100 / 100	148 ms	15944 KiB

remittance

#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vb vector<bool>
#define mii map<int,int>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define in(a) int a; cin>>a
#define in2(a,b) int a,b; cin>>a>>b
#define in3(a,b,c) int a,b,c; cin>>a>>b>>c
#define in4(a,b,c,d) int a,b,c,d; cin>>a>>b>>c>>d
#define vin(v,n); vi v(n); f0r(i,n){cin>>v[i];}
#define out(a) cout<<a<<'\n'
#define out2(a,b) cout<<a<<' '<<b<<'\n'
#define out3(a,b,c) cout<<a<<' '<<b<<' '<<c<<'\n'
#define out4(a,b,c,d) cout<<a<<' '<<b<<' '<<c<<' '<<d<<'\n'
#define pout(a) cout<<a.first<<' '<<a.second<<'\n'
#define vout(v) for(auto u : v){cout<<u<<' ';} cout<<'\n'
#define dout(a) cout<<a<<' '<<#a<<'\n'
#define dout2(a,b) cout<<a<<' '<<#a<<' '<<b<<' '<<#b<<'\n'
#define yn(x); if(x){cout<<"YES"<<'\n';}else{cout<<"NO"<<'\n';}
const int leg = 1e9 + 7;
const int mod = 998244353;
using namespace std;
 
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	in(n);
	vi a(n);
	vi b(n);
	f0r(i,n){
		in2(x,y);
		a[i] = x;
		b[i] = y;
	}
	
	int sum = accumulate(all(a), 0LL);
	int tar = accumulate(all(b), 0LL);
	if(sum < tar){
		out("No");
	}
	else{
		int ptr = 0;
		int cnt = 0;
		while(sum > tar && cnt < 2 * n + 100){
			if(a[ptr] > b[ptr]){
				int dif = (a[ptr] - b[ptr]);
				int moves = (dif + 1) / 2;
				a[ptr] -= moves * 2;
				a[(ptr + 1) % n] += moves;
				if(a[ptr] < 0){
					a[ptr]+= 2;
					a[(ptr+1) % n]--;
					moves--;
				}
				sum -= moves;
			}
			ptr++;
			ptr %= n;
			cnt++;
		}
		
		bool ok = 1;
		f0r(i, n){
			if(a[i] != b[i])ok = 0;
		}
		if(ok)out("Yes");
		else out("No");
	}
	
}

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