Submission #875964

#	Time	Username	Problem	Language	Result	Execution time	Memory
875964		auslander	Divide and conquer (IZhO14_divide)	C++17	0 / 100	0 ms	2396 KiB

divide

#include <iostream>
#include <algorithm>
#include <math.h>
#include <sstream>
#include <string>
#include <iomanip>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <map>
#include <vector>
#include <iterator>
using namespace std;

//defines
#define ll long long
#define usg unsigned
#define kap map
#define print(x, n) for(int for_loop = 0; for_loop < n; for_loop++){cout<<x[for_loop]<<' ';}cout<<endl; 
#define read(x, n) for(int for_loop = 0; for_loop < n; for_loop++){cin>>x[for_loop];} 
#define speed ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ratdig(x) cout << fixed << setprecision(x);
#define xfixdig(x) cout << setprecision(x);
#define multi int t; cin>>t; presolve(); while(t--) solve()
#define single presolve(); solve(); return 0
#define rev(x) reverse(x.begin(), x.end())
#define all(x) x.begin(), x.end()

//functions
void yn(bool b)
{
	if (b)
	{
		cout << "YES\n";
		return;
	}
	cout << "NO\n";
}

ll gcd(ll a, ll b) {
	if (a == 0)
		return b;
	if (b == 0)
		return a;
	return gcd(b % a, a);
}

ll lcm(ll a, ll b)
{
	return (a * b) / gcd(a, b);
}

string to2(ll a)
{
	string r = "";
	for (ll i = a; i > 0; )
	{
		ll k = i % 2;
		i /= 2;
		char c = k + 48;
		r += c;
	}
	if (a == 0)
	{
		r = "0";
	}
	rev(r);

	return r;
}

ll binpow(ll a, ll b, ll mod = -1)
{
	ll ans = 1;
	while (b)
	{
		if ((b & 1) == 1)
		{
			ans *= a;
			if (mod != -1)
				ans %= mod;
		}
		b >>= 1;
		a *= a;
		if (mod != -1)
			a %= mod;
	}
	return ans;
}

//body

void presolve()
{

}

const int N = 100005;
ll gp[N], ep[N], g[N], e[N], x[N];
map < ll, ll > mp;
void solve()
{
	ll i, j, n, m, k;
	cin >> n;
	m = 0;
	k = 0;
	i = 0;
	ll res = 0;
	cin >> x[i] >> g[i] >> e[i];
	m += g[i];
	res = g[i];
	gp[i] = m;
	ep[0] = e[0];
	mp[ep[0]] = 1;
	for (i = 1; i < n; i++)
	{
		cin >> x[i] >> g[i] >> e[i];
		res = max(g[i], res);
		m += g[i];
		gp[i] = m;
		ep[i] = -x[i] + x[i - 1] + e[i];
		ep[i] += ep[i - 1];
		mp[ep[i]] = i + 1;
	}
	m = 0;
	ll q = 0;
	for (i = 0; i < n; i++)
	{
		//cout << ep[i] << ' ';
		//cout << gp[i] << ' ';
		//cout << m << ' ' << mp[m] << endl;
		if (mp[m] == 0)
			continue;
		if (mp[m] - 1 <= i)
			continue;
		ll w = gp[mp[m] - 1] - q;
		q = gp[i];
		m = ep[i];
		res = max(res, w);
	}
	//cout << endl;
	cout << res << endl;
}

int main()
{
	speed;
	single;
	multi;

	return 0;
}

Compilation message (stderr)

divide.cpp: In function 'void solve()':
divide.cpp:104:8: warning: unused variable 'j' [-Wunused-variable]
  104 |  ll i, j, n, m, k;
      |        ^
divide.cpp:104:17: warning: variable 'k' set but not used [-Wunused-but-set-variable]
  104 |  ll i, j, n, m, k;
      |                 ^

• Subtask 1: 0 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52