Submission #89756

#	Time	Username	Problem	Language	Result	Execution time	Memory
89756		inom	Divide and conquer (IZhO14_divide)	C++14	17 / 100	55 ms	7424 KiB

divide

#include<bits/stdc++.h>
#include<ext/pb_ds/tree_policy.hpp>
#include<ext/pb_ds/assoc_container.hpp>

#define fi first
#define se second
#define new new228
#define pb push_back
#define rank rank228
#define int long long
#define sz(c) (int)(c).size()
#define all(c) (c).begin(), (c).end()
#define rall(c) (c).rbegin(), (c).rend()
 
using namespace std;
using namespace __gnu_pbds;
 
#pragma GCC optimize("Ofast")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx,tune=native")
#pragma GCC optimize("fast-math")
#pragma warning(disable : 4996)
 
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; // st.oreder_of_key();

const int L = 20;
const int N = 200200;
const int INF = 1e15;
const int MOD = 998244353;
 
int TN = 1;

int n;
int x[N], g[N], d[N];
int preg[N], pred[N];

void solve() {
	scanf("%lld", &n);
	for (int i = 1; i <= n; i++) {
		scanf("%lld %lld %lld", x + i, g + i, d + i);
		pred[i] = pred[i - 1] + d[i]; preg[i] = preg[i - 1] + g[i]; 
	}
	int l = 1, r = 1, ans = 0;
	while (l <= r) {
		// printf("%lld %lld\n", l, r);
		int len = x[r] - x[l], energy = pred[r] - pred[l - 1];
		if (energy < 0) {
			break;
		}
		if (len <= energy) {
			ans = max(ans, preg[r] - preg[l - 1]); r++;
		} else {
			l++;
		}
	}
	printf("%lld\n", ans);
    return;
}

signed main() {
    // ios_base::sync_with_stdio(0);
    // in; out;  // cin >> TN;
    while (TN--) { solve(); }
    return 0;
 }

Compilation message (stderr)

divide.cpp:23:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable : 4996)
 
divide.cpp: In function 'void solve()':
divide.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld", &n);
  ~~~~~^~~~~~~~~~~~
divide.cpp:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld %lld", x + i, g + i, d + i);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52