Submission #875114

#	Time	Username	Problem	Language	Result	Execution time	Memory
875114		Ahmed57	Sum Zero (RMI20_sumzero)	C++17	0 / 100	10 ms	3088 KiB

sumzero

#include <bits/stdc++.h>
using namespace std;
int P[100001][16];
int main(){
    int n;
    cin>>n;
    long long arr[n];
    map<int,int> mp;
    long long sum = 0;
    mp[0] = 1;
    for(int i = 0;i<n;i++){
        cin>>arr[i];
        sum+=arr[i];
        if(mp[sum]>0){
            P[mp[sum]-1][0] = i;
        }
        mp[sum] = i+2;
    }
    for(int i = 0;i<=n;i++){
        if(P[i][0]==0)P[i][0] = n;
    }
    for(int i = n;i>=0;i--){
        if(i<n)P[i][0] = min(P[i][0],P[i+1][0]);
        for(int j = 1;j<16;j++){
            P[i][j] = P[min(n,P[i][j-1]+1)][j-1];
        }
    }
    int q;cin>>q;
    while(q--){
        int l,r;cin>>l>>r;l--;r--;
        int ans = 0;
        for(int i = 15;i>=0;i--){
            if(P[l][i]<=r){
                ans+=(1<<i);
                l = P[l][i]+1;
            }
        }
        cout<<ans<<endl;
    }
    return 0;
}

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