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Submission #496103

# Submission time Handle Problem Language Result Execution time Memory
496103 2021-12-20T16:46:02 Z shmad Divide and conquer (IZhO14_divide) C++17
48 / 100
 1000 ms 2252 KB 
#include <bits/stdc++.h>
 
#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define ff first
#define ss second
#define dbg(x) cerr << #x << " = " << x << '\n'
 
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vvi = vt< vt<int> >;
 
const int N = 1e6 + 5, mod = 1e9 + 7, inf = 1e18 + 7, B = 500, LIM = (1ll << 25);
const double eps = 1e-6;
 
bool check (int k, vt<int> p, int x, int d) {
	return (p[k] <= d - x);
}
 
void solve () {
	int n;
	cin >> n;
	vt<int> x(n + 1, 0), g(n + 1, 0), d(n + 1, 0), p(n + 1, inf);
	for (int i = 1; i <= n; i++) cin >> x[i] >> g[i] >> d[i];
	partial_sum(all(g), g.begin());
	partial_sum(all(d), d.begin());
	for (int i = 1; i <= n; i++) p[i] = min(p[i - 1], d[i - 1] - x[i]);
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		int l = 1, r = i;
		while (l <= r) {
			int mid = l + r >> 1;
			if (check(mid, p, x[i], d[i])) r = mid - 1;
			else l = mid + 1;
		}
		ans = max(ans, g[i] - g[r]);
	}
	cout << ans;
	cout << '\n';
}
 
bool testcases = 0;
 
signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    int test = 1;
    if (testcases) cin >> test;
    for (int cs = 1; cs <= test; cs++) {
        solve();
    }
}

Compilation message

divide.cpp: In function 'void solve()':
divide.cpp:36:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   36 |    int mid = l + r >> 1;
      |              ~~^~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 3 ms 332 KB Output is correct
18 Correct 4 ms 356 KB Output is correct
19 Correct 2 ms 332 KB Output is correct
20 Correct 3 ms 332 KB Output is correct
21 Correct 5 ms 332 KB Output is correct
22 Correct 10 ms 388 KB Output is correct
23 Correct 76 ms 460 KB Output is correct
24 Correct 70 ms 500 KB Output is correct

Subtask #3
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 3 ms 332 KB Output is correct
18 Correct 4 ms 356 KB Output is correct
19 Correct 2 ms 332 KB Output is correct
20 Correct 3 ms 332 KB Output is correct
21 Correct 5 ms 332 KB Output is correct
22 Correct 10 ms 388 KB Output is correct
23 Correct 76 ms 460 KB Output is correct
24 Correct 70 ms 500 KB Output is correct
25 Correct 63 ms 460 KB Output is correct
26 Correct 256 ms 680 KB Output is correct
27 Correct 258 ms 696 KB Output is correct
28 Execution timed out 1094 ms 2252 KB Time limit exceeded
29 Halted 0 ms 0 KB -