oj.uz

Submission #62202

# Submission time Handle Problem Language Result Execution time Memory
62202 2018-07-27T20:13:51 Z qkxwsm Art Exhibition (JOI18_art) C++17
100 / 100
 353 ms 224984 KB 
/*
PROG: source
LANG: C++11
    _____
  .'     '.
 /  0   0  \
|     ^     |
|  \     /  |
 \  '---'  /
  '._____.'
 */
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

struct chash
{
    int operator()(int x) const
	{
		x ^= (x >> 20) ^ (x >> 12);
    	return x ^ (x >> 7) ^ (x >> 4);
	}
	int operator()(long long x) const
	{
		return x ^ (x >> 32);
	}
};

template<typename T> using orderedset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T> using hashtable = gp_hash_table<T, T, chash>;

template<class T>
void readi(T &x)
{
	T input = 0;
	bool negative = false;
	char c = ' ';
	while (c < '-')
	{
		c = getchar();
	}
	if (c == '-')
	{
		negative = true;
		c = getchar();
	}
	while (c >= '0')
	{
		input = input * 10 + (c - '0');
		c = getchar();
	}
	if (negative)
	{
		input = -input;
	}
	x = input;
}
template<class T>
void printi(T output)
{
	if (output == 0)
	{
		putchar('0');
		return;
	}
	if (output < 0)
	{
		putchar('-');
		output = -output;
	}
	int aout[20];
	int ilen = 0;
	while(output)
	{
		aout[ilen] = ((output % 10));
		output /= 10;
		ilen++;
	}
	for (int i = ilen - 1; i >= 0; i--)
	{
		putchar(aout[i] + '0');
	}
	return;
}
template<class T>
void ckmin(T &a, T b)
{
	a = min(a, b);
}
template<class T>
void ckmax(T &a, T b)
{
	a = max(a, b);
}
template<class T>
T normalize(T x, T mod = 1000000007)
{
	return (((x % mod) + mod) % mod);
}
long long randomizell(long long mod)
{
	return ((1ll << 45) * rand() + (1ll << 30) * rand() + (1ll << 15) * rand() + rand()) % mod;
}
int randomize(int mod)
{
	return ((1ll << 15) * rand() + rand()) % mod;
}

#define y0 ___y0
#define y1 ___y1
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define PF push_front
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define debug(x) cerr << #x << " = " << x << endl;

const long double PI = 4.0 * atan(1.0);
const long double EPS = 1e-10;

#define MAGIC 347
#define SINF 10007
#define CO 1000007
#define INF 1000000007
#define BIG 1000000931
#define LARGE 1696969696967ll
#define GIANT 2564008813937411ll
#define LLINF 2696969696969696969ll
#define MAXN 500013

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;

int N;
pll arr[MAXN];
ll pref[MAXN];
ll ans;

int32_t main()
{
	ios_base::sync_with_stdio(0);
	srand(time(0));
	//	cout << fixed << setprecision(10);
	//	cerr << fixed << setprecision(10);
	if (fopen("input.in", "r"))
	{
		freopen ("input.in", "r", stdin);
		freopen ("output.out", "w", stdout);
	}
    cin >> N;
    for (int i = 0; i < N; i++)
    {
        cin >> arr[i].fi >> arr[i].se;
    }
    sort(arr, arr + N);
    for (int i = 0; i < N; i++)
    {
        pref[i + 1] = pref[i] + arr[i].se;
    }
    // for (int i = 0; i < N; i++)
    // {
    //     for (int j = i; j < N; j++)
    //     {
    //         ckmax(ans, pref[j + 1] - arr[j].fi - (pref[i] - arr[i].fi));
    //     }
    // }
    ll best = -LLINF;
    for (int i = N - 1; i >= 0; i--)
    {
        ckmax(best, pref[i + 1] - arr[i].fi);
        ckmax(ans, best - (pref[i] - arr[i].fi));
    }
    cout << ans << '\n';
	//	cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
	return 0;
}

Compilation message

art.cpp: In function 'int32_t main()':
art.cpp:156:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ("input.in", "r", stdin);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:157:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ("output.out", "w", stdout);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 448 KB Output is correct
3 Correct 3 ms 448 KB Output is correct
4 Correct 3 ms 448 KB Output is correct
5 Correct 3 ms 448 KB Output is correct
6 Correct 3 ms 652 KB Output is correct
7 Correct 3 ms 652 KB Output is correct
8 Correct 3 ms 652 KB Output is correct
9 Correct 3 ms 652 KB Output is correct
10 Correct 2 ms 652 KB Output is correct
11 Correct 2 ms 652 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 448 KB Output is correct
3 Correct 3 ms 448 KB Output is correct
4 Correct 3 ms 448 KB Output is correct
5 Correct 3 ms 448 KB Output is correct
6 Correct 3 ms 652 KB Output is correct
7 Correct 3 ms 652 KB Output is correct
8 Correct 3 ms 652 KB Output is correct
9 Correct 3 ms 652 KB Output is correct
10 Correct 2 ms 652 KB Output is correct
11 Correct 2 ms 652 KB Output is correct
12 Correct 3 ms 652 KB Output is correct
13 Correct 2 ms 652 KB Output is correct
14 Correct 3 ms 652 KB Output is correct
15 Correct 3 ms 652 KB Output is correct
16 Correct 3 ms 652 KB Output is correct
17 Correct 3 ms 652 KB Output is correct
18 Correct 3 ms 728 KB Output is correct
19 Correct 4 ms 728 KB Output is correct
20 Correct 4 ms 728 KB Output is correct
21 Correct 3 ms 728 KB Output is correct
22 Correct 3 ms 728 KB Output is correct
23 Correct 3 ms 728 KB Output is correct
24 Correct 4 ms 728 KB Output is correct
25 Correct 3 ms 728 KB Output is correct
26 Correct 3 ms 728 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 448 KB Output is correct
3 Correct 3 ms 448 KB Output is correct
4 Correct 3 ms 448 KB Output is correct
5 Correct 3 ms 448 KB Output is correct
6 Correct 3 ms 652 KB Output is correct
7 Correct 3 ms 652 KB Output is correct
8 Correct 3 ms 652 KB Output is correct
9 Correct 3 ms 652 KB Output is correct
10 Correct 2 ms 652 KB Output is correct
11 Correct 2 ms 652 KB Output is correct
12 Correct 3 ms 652 KB Output is correct
13 Correct 2 ms 652 KB Output is correct
14 Correct 3 ms 652 KB Output is correct
15 Correct 3 ms 652 KB Output is correct
16 Correct 3 ms 652 KB Output is correct
17 Correct 3 ms 652 KB Output is correct
18 Correct 3 ms 728 KB Output is correct
19 Correct 4 ms 728 KB Output is correct
20 Correct 4 ms 728 KB Output is correct
21 Correct 3 ms 728 KB Output is correct
22 Correct 3 ms 728 KB Output is correct
23 Correct 3 ms 728 KB Output is correct
24 Correct 4 ms 728 KB Output is correct
25 Correct 3 ms 728 KB Output is correct
26 Correct 3 ms 728 KB Output is correct
27 Correct 6 ms 748 KB Output is correct
28 Correct 6 ms 748 KB Output is correct
29 Correct 7 ms 748 KB Output is correct
30 Correct 6 ms 748 KB Output is correct
31 Correct 7 ms 748 KB Output is correct
32 Correct 5 ms 748 KB Output is correct
33 Correct 4 ms 748 KB Output is correct
34 Correct 5 ms 748 KB Output is correct
35 Correct 7 ms 876 KB Output is correct
36 Correct 5 ms 880 KB Output is correct
37 Correct 7 ms 880 KB Output is correct
38 Correct 6 ms 880 KB Output is correct
39 Correct 7 ms 880 KB Output is correct
40 Correct 6 ms 880 KB Output is correct
41 Correct 6 ms 880 KB Output is correct
42 Correct 6 ms 880 KB Output is correct
43 Correct 6 ms 880 KB Output is correct
44 Correct 5 ms 880 KB Output is correct
45 Correct 5 ms 880 KB Output is correct
46 Correct 5 ms 880 KB Output is correct
47 Correct 5 ms 880 KB Output is correct
48 Correct 5 ms 880 KB Output is correct
49 Correct 4 ms 880 KB Output is correct
50 Correct 6 ms 880 KB Output is correct
51 Correct 6 ms 880 KB Output is correct

Subtask #4
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 448 KB Output is correct
3 Correct 3 ms 448 KB Output is correct
4 Correct 3 ms 448 KB Output is correct
5 Correct 3 ms 448 KB Output is correct
6 Correct 3 ms 652 KB Output is correct
7 Correct 3 ms 652 KB Output is correct
8 Correct 3 ms 652 KB Output is correct
9 Correct 3 ms 652 KB Output is correct
10 Correct 2 ms 652 KB Output is correct
11 Correct 2 ms 652 KB Output is correct
12 Correct 3 ms 652 KB Output is correct
13 Correct 2 ms 652 KB Output is correct
14 Correct 3 ms 652 KB Output is correct
15 Correct 3 ms 652 KB Output is correct
16 Correct 3 ms 652 KB Output is correct
17 Correct 3 ms 652 KB Output is correct
18 Correct 3 ms 728 KB Output is correct
19 Correct 4 ms 728 KB Output is correct
20 Correct 4 ms 728 KB Output is correct
21 Correct 3 ms 728 KB Output is correct
22 Correct 3 ms 728 KB Output is correct
23 Correct 3 ms 728 KB Output is correct
24 Correct 4 ms 728 KB Output is correct
25 Correct 3 ms 728 KB Output is correct
26 Correct 3 ms 728 KB Output is correct
27 Correct 6 ms 748 KB Output is correct
28 Correct 6 ms 748 KB Output is correct
29 Correct 7 ms 748 KB Output is correct
30 Correct 6 ms 748 KB Output is correct
31 Correct 7 ms 748 KB Output is correct
32 Correct 5 ms 748 KB Output is correct
33 Correct 4 ms 748 KB Output is correct
34 Correct 5 ms 748 KB Output is correct
35 Correct 7 ms 876 KB Output is correct
36 Correct 5 ms 880 KB Output is correct
37 Correct 7 ms 880 KB Output is correct
38 Correct 6 ms 880 KB Output is correct
39 Correct 7 ms 880 KB Output is correct
40 Correct 6 ms 880 KB Output is correct
41 Correct 6 ms 880 KB Output is correct
42 Correct 6 ms 880 KB Output is correct
43 Correct 6 ms 880 KB Output is correct
44 Correct 5 ms 880 KB Output is correct
45 Correct 5 ms 880 KB Output is correct
46 Correct 5 ms 880 KB Output is correct
47 Correct 5 ms 880 KB Output is correct
48 Correct 5 ms 880 KB Output is correct
49 Correct 4 ms 880 KB Output is correct
50 Correct 6 ms 880 KB Output is correct
51 Correct 6 ms 880 KB Output is correct
52 Correct 313 ms 22280 KB Output is correct
53 Correct 284 ms 34908 KB Output is correct
54 Correct 276 ms 47792 KB Output is correct
55 Correct 268 ms 60448 KB Output is correct
56 Correct 297 ms 73132 KB Output is correct
57 Correct 272 ms 85936 KB Output is correct
58 Correct 291 ms 98396 KB Output is correct
59 Correct 288 ms 111056 KB Output is correct
60 Correct 304 ms 123820 KB Output is correct
61 Correct 353 ms 136424 KB Output is correct
62 Correct 274 ms 149052 KB Output is correct
63 Correct 262 ms 161716 KB Output is correct
64 Correct 279 ms 174432 KB Output is correct
65 Correct 305 ms 187052 KB Output is correct
66 Correct 268 ms 199728 KB Output is correct
67 Correct 252 ms 212300 KB Output is correct
68 Correct 285 ms 224984 KB Output is correct