func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize( O2 )   using namespace std;   int main() {     int n, co = 1;     std::vector<pair<long long, long long>> v;     cin >> n;     for (int i = 0; i < n; i++) {       long long a, b;       cin >> a >> b;       v.push_back(make_pair(a, b));     }     for (int i = 1; i < n; i++) {       if (v[i].first - v[i].second > v[i - 1].first) {         co++;       } else if (v[i].first + v[i].second < v[i + 1].first) {         v[i].first = v[i].first + v[i].second;         co++;       } else if (i == n - 1) {         co++;       }     }     cout << co;     return 0;   }   