Submission #1112591

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112591		guagua0407	Potatoes and fertilizers (LMIO19_bulves)	C++17	100 / 100	143 ms	17344 KiB

bulves

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

signed main() {_
    int n;
    cin>>n;
    vector<ll> dif(n+1);
    for(int i=1;i<=n;i++){
        int a,b;
        cin>>a>>b;
        dif[i]=dif[i-1]+a-b;
    }
    priority_queue<ll> pq;
    pq.push(0);
    ll ans=0;
    for(int i=1;i<=n;i++){
        if(dif[i]<0){
            ans-=dif[i];
            dif[i]=0;
        }
        pq.push(dif[i]);
        if(pq.top()>dif[i]){
            pq.push(dif[i]);
            ans+=pq.top()-dif[i];
            pq.pop();
        }
    }
    int cnt=1;
    while(pq.top()>dif[n]){
        int r=pq.top();
        pq.pop();
        ans+=1ll*cnt*(r-max(dif[n],pq.top()));
        cnt++;
    }
    cout<<ans<<'\n';
    return 0;
}
//maybe its multiset not set

Compilation message (stderr)

bulves.cpp: In function 'void setIO(std::string)':
bulves.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bulves.cpp:14:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 10 / 10
• Subtask 5: 36 / 36