#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     int n;     cin >> n;     int a[n][2];     int l = 0, r = 0;     for (int i = 0; i < n; i++) {       cin >> a[i][0] >> a[i][1];       l += a[i][0];       r += a[i][1];     }     int ans = abs(l - r);     int ind = 0;     int res = ans;     for (int i = 0; i < n; i++) {       int temp;       temp = abs(l - r + 2 * (a[i][1]) - 2 * a[i][0]);       if (temp > res) {         res = temp;         ind = i + 1;       }     }     cout << ind << endl;     return 0;   }   