/*
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, typename U> using hashtable = gp_hash_table<T, U, 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, class U>
T normalize(T x, U 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 100013
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<pll, ll> ppl;
typedef pair<ld, ld> pdd;
int N;
ll pos[MAXN];
ll energy[MAXN], gain[MAXN];
ll pref[MAXN];
ll arr[MAXN];
ll parr[MAXN];
ll stor[20][MAXN];
ll ans;
ll query(int L, int R)
{
// ll res = -LLINF;
// for (int i = L; i <= R; i++)
// {
// ckmax(res, parr[i]);
// }
// return res;
int lg = (31 - __builtin_clz(R - L + 1));
return max(stor[lg][L], stor[lg][R - (1 << lg) + 1]);
}
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 >> pos[i] >> gain[i] >> energy[i];
pref[i + 1] = pref[i] + gain[i];
int x = energy[i];
if (i)
{
x -= (pos[i] - pos[i - 1]);
}
parr[i + 1] = parr[i] + x;
}
// for (int i = 0; i <= N; i++)
// {
// cerr << parr[i] << ' ';
// }
// cerr << endl;
for (int i = 0; i <= N; i++)
{
stor[0][i] = parr[i];
}
for (int i = 1; i < 20; i++)
{
for (int j = 0; j <= N; j++)
{
if (j + (1 << i) > N + 1)
{
stor[i][j] = -LLINF;
}
else
{
stor[i][j] = max(stor[i - 1][j], stor[i - 1][j + (1 << (i - 1))]);
}
}
}
for (int i = 0; i < N; i++)
{
int lo = i + 1, hi = N;
while(hi > lo)
{
int mid = (hi + lo + 1) / 2;
if (query(mid, N) - parr[i + 1] + (energy[i]) < 0)
{
hi = mid - 1;
}
else
{
lo = mid;
}
}
// cerr << i << ' ' << lo << endl;
ckmax(ans, pref[lo] - pref[i]);
}
cout << ans << '\n';
//<<pos, energy>, gain>
// cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
return 0;
}
Compilation message
divide.cpp: In function 'int32_t main()':
divide.cpp:172:11: 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);
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
divide.cpp:173:11: 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);
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
504 KB |
Output is correct |
| 2 |
Correct |
3 ms |
504 KB |
Output is correct |
| 3 |
Correct |
3 ms |
552 KB |
Output is correct |
| 4 |
Correct |
3 ms |
668 KB |
Output is correct |
| 5 |
Correct |
3 ms |
776 KB |
Output is correct |
| 6 |
Correct |
3 ms |
908 KB |
Output is correct |
| 7 |
Correct |
3 ms |
908 KB |
Output is correct |
| 8 |
Correct |
3 ms |
916 KB |
Output is correct |
| 9 |
Correct |
2 ms |
916 KB |
Output is correct |
| 10 |
Correct |
3 ms |
916 KB |
Output is correct |
| 11 |
Correct |
1 ms |
916 KB |
Output is correct |
| 12 |
Correct |
3 ms |
916 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
916 KB |
Output is correct |
| 2 |
Correct |
4 ms |
956 KB |
Output is correct |
| 3 |
Correct |
4 ms |
960 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1004 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1112 KB |
Output is correct |
| 6 |
Correct |
4 ms |
1244 KB |
Output is correct |
| 7 |
Correct |
4 ms |
1244 KB |
Output is correct |
| 8 |
Correct |
4 ms |
1244 KB |
Output is correct |
| 9 |
Correct |
5 ms |
1336 KB |
Output is correct |
| 10 |
Correct |
4 ms |
1532 KB |
Output is correct |
| 11 |
Correct |
8 ms |
2184 KB |
Output is correct |
| 12 |
Correct |
7 ms |
2380 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
2420 KB |
Output is correct |
| 2 |
Correct |
8 ms |
3508 KB |
Output is correct |
| 3 |
Correct |
10 ms |
3764 KB |
Output is correct |
| 4 |
Correct |
32 ms |
12536 KB |
Output is correct |
| 5 |
Correct |
44 ms |
13852 KB |
Output is correct |
| 6 |
Correct |
74 ms |
26596 KB |
Output is correct |
| 7 |
Correct |
67 ms |
28440 KB |
Output is correct |
| 8 |
Correct |
67 ms |
30412 KB |
Output is correct |
| 9 |
Correct |
65 ms |
32104 KB |
Output is correct |
| 10 |
Correct |
72 ms |
33808 KB |
Output is correct |
| 11 |
Correct |
98 ms |
36108 KB |
Output is correct |
| 12 |
Correct |
76 ms |
38416 KB |
Output is correct |
