Submission #919755

#	Time	Username	Problem	Language	Result	Execution time	Memory
919755		8pete8	Potatoes and fertilizers (LMIO19_bulves)	C++17	100 / 100	171 ms	16856 KiB

bulves

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<cassert>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include<bitset> 
#include<stack>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define pppiiii pair<pii,pii>
#define ppii pair<int,pii>
#define all(x) x.begin(),x.end()
#define pb push_back
#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
#define int long long
const int mod=1e9+7,mxn=5e5+5,lg=30,inf=1e18,minf=-1e9,Mxn=100000;
int n,k;
void setIO(string name){		
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}
int val[mxn+10];
int32_t main(){
	fastio
	int n;cin>>n;
	for(int i=1;i<=n;i++){
		int a,b;cin>>a>>b;
		val[i]=val[i-1]+a-b;
	}
	priority_queue<int>pq;
	int ans=0;
	for(int i=1;i<=n;i++){
		if(val[i]<0)ans-=val[i],val[i]=0;
		ans+=val[i];
		pq.push(val[i]);
		pq.push(val[i]);
		pq.pop();
	}
	while(!pq.empty())ans-=min(val[n],pq.top()),pq.pop();
	cout<<ans;
	return 0;
}

Compilation message (stderr)

bulves.cpp: In function 'void setIO(std::string)':
bulves.cpp:36:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bulves.cpp:37:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |  freopen((name+".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