Submission #287989

#	Time	Username	Problem	Language	Result	Execution time	Memory
287989		oolimry	Bigger segments (IZhO19_segments)	C++14	0 / 100	2 ms	384 KiB

segments

#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define sz(x) (int) (x).size()
using namespace std;
typedef long long lint;
typedef pair<int,lint> ii;
typedef pair<lint,ii> iii;

int arr[500006];

int main(){
	freopen("i.txt","r",stdin);
	ios_base::sync_with_stdio(false); cin.tie(0);
	
	int n; cin >> n;
	for(int i = 1;i <= n;i++) cin >> arr[i];
	lint prefix = 0;
			
	deque<iii> D;
	D.push_back(iii(0,ii(0,0)));
	
	for(int i = 1;i <= n;i++){
		prefix += arr[i];
		
		while(sz(D) > 1){
			if(D[1].first <= prefix) D.pop_front();
			else break;
		}
		
		ii res = D[0].second;
		int most = res.first + 1;
		lint take = prefix - res.second;
		
		if(i == n) cout << most;
		while(sz(D) > 0){
			iii T = D.back();
			if(T.first >= take + prefix) D.pop_back();
			else break;
		}
		D.push_back(iii(take+prefix, ii(most, prefix)));
	}
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   12 |  freopen("i.txt","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~

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