oj.uz

Submission #392234

# Submission time Handle Problem Language Result Execution time Memory
392234 2021-04-20T17:07:43 Z acm Divide and conquer (IZhO14_divide) C++14
100 / 100
 94 ms 13016 KB 
#include <bits/stdc++.h>
#define speed                   \
  ios_base::sync_with_stdio(0); \
  cin.tie(0);                   \
  cout.tie(0);
#define precision     \
  cout.precision(30); \
  cerr.precision(10);
#define ll long long
#define ld long double
#define pll pair<ll, ll>
#define pii pair<int, int>
#define forn(n) for (int i = 1; i <= n; i++)
#define forlr(l, r) for (int i = l; i != r; (l > r ? i-- : i++))
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define mp(x, y) make_pair(x, y)
#define all(x) x.begin(), x.end()
#define pc(x) __builtin_popcount(x)
#define pcll(x) __builtin_popcountll(x)
#define F first
#define S second
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
void ioi(string name) {
  freopen((name + ".in").c_str(), "r", stdin);
  freopen((name + ".out").c_str(), "w", stdout);
}
ll n, k, m = -(1LL << 60), g[100005], e[100005], t[800005];
pair<ll, pair<ll, ll>> a[100005];
vector<ll> b;
void upd(ll v, ll l, ll r, ll x, ll y) {
  if (l == r) {
    t[v] = y;
    return;
  }
  ll tm = (l + r) / 2;
  if (x <= tm)
    upd(v + v, l, tm, x, y);
  else
    upd(v + v + 1, tm + 1, r, x, y);
  t[v] = max(t[v + v], t[v + v + 1]);
}
ll get(ll v, ll l, ll r, ll x, ll y) {
  if (r < x || y < l) return 0;
  if (x <= l && r <= y) return t[v];
  ll tm = (l + r) / 2;
  return max(get(v + v, l, tm, x, y), get(v + v + 1, tm + 1, r, x, y));
}
int main() {
  speed;
  precision;
  // code
  cin >> n;
  for (int i = 1; i <= n; i++) {
    ll x, y, z;
    cin >> x >> y >> z;
    a[i] = mp(x, mp(y, z));
    g[i] = g[i - 1] + y;
    e[i] = e[i - 1] + z;
    b.pb(a[i].F - e[i - 1]);
    b.pb(a[i].F - e[i]);
  }
  sort(all(b));
  b.erase(unique(all(b)), b.end());
  k = sz(b);
  for (int i = 1; i <= n; i++) {
    upd(1, 1, k, lower_bound(all(b), a[i].F - e[i]) - b.begin() + 1, g[i]);
  }
  for (int i = 1; i <= n; i++) {
    m = max(m, get(1, 1, k, 1, lower_bound(all(b), a[i].F - e[i - 1]) - b.begin() + 1) - g[i - 1]);
  }
  cout << m;
  // endl
#ifndef ONLINE_JUDGE
  cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
  return 0;
}

Compilation message

divide.cpp: In function 'void ioi(std::string)':
divide.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   26 |   freopen((name + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
divide.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   27 |   freopen((name + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 2 ms 460 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 5 ms 972 KB Output is correct
24 Correct 5 ms 972 KB Output is correct

Subtask #3
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 2 ms 460 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 5 ms 972 KB Output is correct
24 Correct 5 ms 972 KB Output is correct
25 Correct 5 ms 972 KB Output is correct
26 Correct 8 ms 1488 KB Output is correct
27 Correct 8 ms 1552 KB Output is correct
28 Correct 43 ms 5264 KB Output is correct
29 Correct 47 ms 6572 KB Output is correct
30 Correct 94 ms 13016 KB Output is correct
31 Correct 85 ms 11664 KB Output is correct
32 Correct 89 ms 11960 KB Output is correct
33 Correct 85 ms 11608 KB Output is correct
34 Correct 90 ms 11708 KB Output is correct
35 Correct 87 ms 12188 KB Output is correct
36 Correct 90 ms 12352 KB Output is correct