oj.uz

Submission #42473

# Submission time Handle Problem Language Result Execution time Memory
42473 2018-02-27T15:25:09 Z MatheusLealV Divide and conquer (IZhO14_divide) C++14
0 / 100
 248 ms 30860 KB 
#include <bits/stdc++.h>
#define N 200050
#define f first
using namespace std;
typedef long long ll;

int cnt;

ll n, sum[N], g[N], x[N], E[N], dp[N], ans, bit[N];

vector<ll> v;

map<ll, ll> mapa;

void upd(int x, ll v)
{
	for(int i = x; i < N; i += (i&-i)) bit[i] = min(bit[i], v);
}

int query(int x)
{
	ll sum = 2000000000000000000LL;

	for(int i = x; i > 0; i -= (i&-i)) sum = min(sum, bit[i]);

	return sum;
}

int main()
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin>>n;

	for(int i = 1, a, b, c; i <= n; i++)
	{
		cin>>x[i]>>g[i]>>E[i];

		sum[i] = E[i] + sum[i - 1];

		g[i] += g[i - 1];

		v.push_back(sum[i] - x[i]);

		v.push_back(sum[i - 1] - x[i]);
	}

	for(int i = 0; i < N; i++) bit[i] = 2000000000000000000LL;

	sort(v.begin(), v.end());

	for(auto x: v) if(!mapa[x]) mapa[x] = ++cnt;

	for(int i = 1; i <= n; i++)
	{
		upd( mapa [ sum[i - 1] - x[i] ], g[i - 1]);

		ll q = g[i] - query( mapa[ sum[i] - x[i] ] );

		ans = max(ans, q);
	}

	cout<<ans<<"\n";
}

Compilation message

divide.cpp: In function 'int main()':
divide.cpp:35:17: warning: unused variable 'a' [-Wunused-variable]
  for(int i = 1, a, b, c; i <= n; i++)
                 ^
divide.cpp:35:20: warning: unused variable 'b' [-Wunused-variable]
  for(int i = 1, a, b, c; i <= n; i++)
                    ^
divide.cpp:35:23: warning: unused variable 'c' [-Wunused-variable]
  for(int i = 1, a, b, c; i <= n; i++)
                       ^

Subtask #1
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1912 KB Output is correct
2 Correct 2 ms 2016 KB Output is correct
3 Correct 2 ms 2076 KB Output is correct
4 Correct 3 ms 2124 KB Output is correct
5 Correct 3 ms 2196 KB Output is correct
6 Incorrect 2 ms 2196 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #2
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2196 KB Output is correct
2 Correct 3 ms 2196 KB Output is correct
3 Correct 3 ms 2284 KB Output is correct
4 Correct 4 ms 2284 KB Output is correct
5 Incorrect 3 ms 2288 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 3056 KB Output is correct
2 Correct 17 ms 3856 KB Output is correct
3 Correct 17 ms 3936 KB Output is correct
4 Correct 104 ms 10852 KB Output is correct
5 Correct 118 ms 12132 KB Output is correct
6 Correct 248 ms 23776 KB Output is correct
7 Correct 235 ms 25764 KB Output is correct
8 Correct 230 ms 27568 KB Output is correct
9 Correct 239 ms 29360 KB Output is correct
10 Incorrect 218 ms 30860 KB Output isn't correct
11 Halted 0 ms 0 KB -