func_code_string: #include <bits/stdc++.h>   using namespace std;   typedef struct x {     int cor;     int power;     bool operator<(x T) const { return cor < T.cor; }   } beacon;   beacon arr[2000009];   vector<int> tmp;   int dp[2000009];   int main() {     int n, m, k;     scanf( %d , &n);     for (int i = 0; i < n; i++) {       scanf( %d%d , &arr[i].cor, &arr[i].power);     }     sort(arr, arr + n);     for (int i = 0; i < n; i++) tmp.push_back(arr[i].cor);     dp[0] = 0;     for (int i = 1; i < n; i++) {       int p = arr[i].power;       int left = arr[i].cor - p;       vector<int>::iterator it = lower_bound(tmp.begin(), tmp.end(), left);       int l = it - tmp.begin();       dp[i] = (i - l);       if (l > 0) dp[i] += dp[l - 1];     }     int ans = INT_MAX;     for (int i = 0; i < n; i++) {       ans = min(ans, dp[i] + (n - i - 1));     }     printf( %d n , ans);   }   