Submission #927071

#	Time	Username	Problem	Language	Result	Execution time	Memory
927071		NintsiChkhaidze	Sum Zero (RMI20_sumzero)	C++17	0 / 100	609 ms	2980 KiB

sumzero

#include <bits/stdc++.h>
#define ll long long
#define s second
#define f first
#define pb push_back
#define pii pair <int,int>
#define left (h<<1),l,(l + r)/2
#define right ((h<<1)|1),(l + r)/2 + 1,r
#define int ll
using namespace std;

const int N = 4e5 + 3;

int a[N],p[N];
signed main(){
	ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);

	int n;
	cin>>n;

	for(int i=1;i<=n;i++){
		cin>>a[i];
		p[i]=p[i-1]+a[i];
	}

	int q;
	cin>>q;
	while(q--){
		int l,r;
		cin>>l>>r;
		int ans=0,R = l-1;
	
		map <int,int> last;
		last[p[l - 1]] = l - 1;

		for (int i = l; i <= r; i++){
			int k = last[p[i]];
			if (k >= R) {
				++ans;
				R = i;
			}
			last[p[i]] = i;
		}
		cout<<ans<<endl;
	}
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 39
• Subtask 3: 0 / 39