Submission #278561

#	Time	Username	Problem	Language	Result	Execution time	Memory
278561		arnold518	Happiness (Balkan15_HAPPINESS)	C++14	0 / 100	1 ms	256 KiB

happiness

#include "happiness.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const ll INF = 1e18;
const int MAXVAL = 8e6;

ll M;

unordered_map<ll, int> tree;

void update(ll i, ll k) { for(; i<=M; i+=(i&-i)) tree[i]+=k; }
ll query(ll i) { ll ret=0; for(; i>0; i-=(i&-i)) ret+=tree[i]; return ret; }

void push(ll x)
{
	update(x, x);
}

void pop(ll x)
{
	update(x, -x);
}

bool query()
{
	ll now=1;
	ll sum=query(M);
	for(ll i=1; i<=M; i++) if(query(now)<now) return 0;
	/*
	while(now<sum)
	{
		if(query(now)<now) return 0;
		now=query(now)+1;
	}
	*/
	return 1;
}

bool init(int coinsCount, ll maxCoinSize, ll coins[])
{
	M=maxCoinSize;

	for(int i=0; i<coinsCount; i++) push(coins[i]);
	return query();
}

bool is_happy(int event, int coinsCount, ll coins[])
{
	if(event==-1) for(int i=0; i<coinsCount; i++) pop(coins[i]);
	else for(int i=0; i<coinsCount; i++) push(coins[i]);
	return query();
}

Compilation message (stderr)

happiness.cpp: In function 'bool query()':
happiness.cpp:32:5: warning: unused variable 'sum' [-Wunused-variable]
   32 |  ll sum=query(M);
      |     ^~~
grader.cpp: In function 'int main()':
grader.cpp:16:12: warning: unused variable 'max_code' [-Wunused-variable]
   16 |  long long max_code;
      |            ^~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40