Submission #254001

#	Time	Username	Problem	Language	Result	Execution time	Memory
254001		Mercenary	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	196 ms	15296 KiB

bulves

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>

#define pb push_back
#define mp make_pair
#define taskname "A"

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;
typedef tree <ii,null_type,less<ii>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
const int maxn = 5e5 + 5;
const int mod = 1e9 + 7;

ll c[maxn];
int n;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen(taskname".INP","r")){
		freopen(taskname".INP", "r",stdin);
		freopen(taskname".OUT", "w",stdout);
    }
    ll res = 0;
    cin >> n;
    for (int i = 1; i <= n; i++) {
        ll a, b;
        cin >> a >> b;
        c[i] = c[i - 1] + a - b;
    }
    for(int i = 1 ; i <= n ; ++i){
        if (c[i] > c[n]) {
            res += c[i] - c[n];
            c[i] = c[n];
        } else if (c[i] < 0) {
            res -= c[i];
            c[i] = 0;
        }
    }
    priority_queue<ll> pq;
    for (int i = 1; i <= n; i++) {
        pq.push(c[i]); pq.push(c[i]);
        res += pq.top() - c[i];
        pq.pop();
    }
    cout << res;
}

Compilation message (stderr)

bulves.cpp: In function 'int main()':
bulves.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".INP", "r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
bulves.cpp:28:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".OUT", "w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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