# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
975336 | Mr_Husanboy | Potatoes and fertilizers (LMIO19_bulves) | C++17 | 71 ms | 21444 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
//#pragma GCC optimize("Ofast,O3")
//#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debugger.cpp"
#else
#define debug(...)
#endif
template<class T>
int len(T &a){
return a.size();
}
using ll = long long;
using pii = pair<int,int>;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
string fileio = "";
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const int MOD = 1e9 + 7;
const int inf = 1e9;
const ll infl = 1e18;
const int maxn = 1e5 + 1;
void solve(){
int n; cin >> n;
vector<ll> dif(n + 1);
for(int i = 1; i <= n; i ++){
int a, b; cin >> a >> b;
dif[i] = a - b;
}
for(int i = 1; i <= n; i ++) dif[i] += dif[i - 1];
debug(dif);
priority_queue<ll> q;
ll ans = 0;
for(int i = 1; i <= n; i ++){
ans += abs(dif[i]);
dif[i] = max(0ll, dif[i]);
q.push(dif[i]); q.push(dif[i]);
ans -= min(dif[n], q.top());
}
cout << ans;
}
int main(){
ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
auto start = chrono::high_resolution_clock::now();
#ifndef LOCAL
if(fileio.size()){
freopen((fileio + ".in").c_str(), "r", stdin);
freopen((fileio + ".out").c_str(), "w", stdout);
}
#endif
int testcases = 1;
#ifdef Tests
cin >> testcases;
#endif
while(testcases --){
solve();
if(testcases) cout << '\n';
#ifdef LOCAL
else cout << '\n';
cout << "_________________________" << endl;
#endif
}
#ifdef LOCAL
auto duration = chrono::duration_cast<chrono::microseconds>(chrono::high_resolution_clock::now() - start);
cout << "time: " << (double)duration.count()/1000.0 << " milliseconds" << endl;
#endif
return 0;
}
Compilation message (stderr)
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