Submission #942629

#	Time	Username	Problem	Language	Result	Execution time	Memory
942629		huutuan	Sum Zero (RMI20_sumzero)	C++14	22 / 100	1055 ms	5780 KiB

sumzero

#include<bits/stdc++.h>

using namespace std;

using ll=long long;
const int N=4e5+10, LG=8;
int n, a[N], nxt[N];
pair<ll, int> pf[N];
int st[LG][N];

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   cin >> n;
   pf[0]={0, 0};
   for (int i=1; i<=n; ++i) cin >> a[i], pf[i]={pf[i-1].first+a[i], i}, nxt[i]=n+1;
   sort(pf, pf+n+1);
   for (int i=0; i<=n; ++i){
      int j=i;
      while (j<n && pf[j+1].first==pf[i].first) ++j;
      for (int k=i; k<j; ++k) nxt[pf[k].second+1]=pf[k+1].second;
      i=j;
   }
   int q; cin >> q;
   while (q--){
      int l, r; cin >> l >> r;
      vector<pair<int, int>> v, vv;
      for (int i=l; i<=r; ++i) if (nxt[i]<=r) vv.emplace_back(i, nxt[i]);
      sort(vv.begin(), vv.end(), [&](pair<int, int> x, pair<int, int> y){
         return x.second<y.second;
      });
      for (auto &i:vv){
         if (v.empty() || i.first>v.back().second) v.push_back(i);
      }
      cout << v.size() << '\n';
   }
   return 0;
}

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