#include <bits/stdc++.h>
using namespace std;
#define N 100005
int n, mh;
long long sum, cnt[N], s[N], ans, p, uld, avr;
pair <int, int> mast[N];
void solve (int l){
if (l > mh) return;
p = l;
// cout << l<< endl;
th = mh;
for (int i = l;i <= mh;i++)
if((s[i] - s[l - 1]) * (p - l + 1) >= (s[p] - s[l - 1]) * (i - l + 1)){
p = i;
th = ((s[th] - s[l - 1]) * (i - l + 1)) / (s[i] - s[l - 1]);
}
sum = s[p] - s[l - 1];
avr = sum / (p - l + 1);
uld = sum % (p - l + 1);
ans += uld * avr;
ans += (p - l + 1) * avr * (avr - 1) / 2;
solve (p + 1);
}
int main (){
ios_base::sync_with_stdio(NULL);
cin.tie(NULL);
cin >> n;
for (int i = 0;i < n;i++){
cin >> mast[i].first>> mast[i].second;
mh = max(mh, mast[i].first);
cnt[mast[i].first + 1]--;
cnt[mast[i].first - mast[i].second + 1]++;
}
p = 1;
for (int i = 1;i <= mh;i++) {
cnt[i] += cnt[i - 1];
s[i] = s[i - 1] + cnt[i];
if(s[i] * p >= s[p] * i)
p = i;
}
avr = s[p] / p;
uld = s[p] % p;
ans += uld * avr;
ans += p * avr * (avr - 1) / 2;
solve (p + 1);
cout << ans;
}
Compilation message
sails.cpp: In function 'void solve(int)':
sails.cpp:13:3: error: 'th' was not declared in this scope
th = mh;
^~
sails.cpp:13:3: note: suggested alternative: 'mh'
th = mh;
^~
mh
