Submission #707754

#	Time	Username	Problem	Language	Result	Execution time	Memory
707754		penguin133	Bigger segments (IZhO19_segments)	C++17	0 / 100	114 ms	262144 KiB

segments

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, A[500005], P[500005], memo[501][501][501];

int dp(int x, int y, int z){
	if(x == n + 1)return (P[n] - P[z-1] >= P[z-1] - P[y-1] ? 1 : -1e18);
	int ans = dp(x+1, y, z);
	if(P[x-1] - P[z-1] >= P[z-1] - P[y-1])ans = max(ans, dp(x+1, z, x) + 1);
	return memo[x][y][z] = ans;
}

void solve(){
	cin >> n;
	for(int i=1;i<=n;i++)cin >> A[i], P[i] = P[i-1] + A[i];
	memset(memo, -1 ,sizeof(memo));
	cout << dp(2, 0, 1);
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message (stderr)

segments.cpp:30:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   30 | main(){
      | ^~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27