Submission #499080

#	Time	Username	Problem	Language	Result	Execution time	Memory
499080		ismoilov	Bigger segments (IZhO19_segments)	C++14	100 / 100	78 ms	18916 KiB

segments

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define IOS ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++)
#define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++)
#define fm(a,i,c) for(int (a) = (i); (a) > (c); (a)--)
#define fmm(a,i,c) for(int (a) = (i); (a) >= (c); (a)--)
void S()
{
	int n;
	cin >> n;
	vector <int> a(n+1);
	fpp(i,1,n)
		cin >> a[i];
	vector <ll> pr(n+2), b(n+2), d(n+2);
	fpp(i,1,n)
		pr[i] = pr[i-1] + a[i];
	fpp(i,1,n){
		b[i] = max(b[i-1], b[i]);
		d[i] = d[b[i]] + 1;
		ll c = 2*pr[i] - pr[b[i]];
		int x = lower_bound(pr.begin()+1, pr.begin()+1+n, c) - pr.begin();
		b[x] = max(b[x], i*1ll);
	}
	cout << d[n];
}
int main()
{
	IOS;
	S();
}

Compilation message (stderr)

segments.cpp: In function 'void S()':
segments.cpp:7:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++)
      |                            ^
segments.cpp:15:2: note: in expansion of macro 'fpp'
   15 |  fpp(i,1,n)
      |  ^~~
segments.cpp:7:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++)
      |                            ^
segments.cpp:18:2: note: in expansion of macro 'fpp'
   18 |  fpp(i,1,n)
      |  ^~~
segments.cpp:7:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++)
      |                            ^
segments.cpp:20:2: note: in expansion of macro 'fpp'
   20 |  fpp(i,1,n){
      |  ^~~

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