26 lines
366 B
C++
26 lines
366 B
C++
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#include<bits/stdc++.h>
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using namespace std;
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using ll = long long;
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void solve()
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{
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int n,a,b,min=0,p=0;
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cin>>n;
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while(n--)
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{
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cin>>a>>b;
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p=p-a+b;
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if(p>min) min=p;
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}
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cout<<min<<endl;
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}
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int main()
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{
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ios_base::sync_with_stdio(false);
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cin.tie(nullptr);
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int TC = 1;
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//cin >> TC;
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while (TC--) solve();
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}
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