func_code_string: #include <bits/stdc++.h>   using namespace std;   map<int, vector<pair<int, int> > > mp;   int n, tt;   int arr[300000];   int main() {     cin >> n;     for (int i = 1; i <= n; i++) cin >> arr[i];     for (int r = 1; r <= n; r++) {       long long sum = 0;       for (int l = r; l >= 1; l--) {         sum += arr[l];         mp[sum].push_back(make_pair(l, r));       }     }     map<int, vector<pair<int, int> > >::iterator it;     vector<pair<int, int> > ans;     for (it = mp.begin(); it != mp.end(); it++) {       int sum = 0;       vector<pair<int, int> > &now = it->second;       vector<pair<int, int> > cnt;       int r = -1;       for (int i = 0; i < now.size(); i++) {         if (now[i].first > r)           sum++, r = now[i].second,                  cnt.push_back(make_pair(now[i].first, now[i].second));       }       if (sum > tt) ans = cnt, tt = sum;     }     cout << tt << endl;     for (int i = 0; i < ans.size(); i++)       cout << ans[i].first <<     << ans[i].second << endl;     return 0;   }   