Submission #623564

#	Time	Username	Problem	Language	Result	Execution time	Memory
623564		ipaljak	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	140 ms	15224 KiB

bulves

#include <bits/stdc++.h>

using namespace std;

typedef long long llint;

const int MAXN = 5e5 + 10;

int n;

llint sum;
llint a[MAXN];

int main(void) {
  scanf("%d", &n);
  for (int i = 0; i < n; ++i) {
    int x, y;
    scanf("%d%d", &x, &y);
    if (i > 0) a[i] = a[i - 1];
    a[i] += (llint)(x - y);
  }

  llint sol = 0;
  for (int i = 0; i < n; ++i) {
    if (a[i] < 0) {
      sol += -a[i];
      a[i] = 0;
    }
    if (a[i] > a[n - 1]) {
      sol += a[i] - a[n - 1];
      a[i] = a[n - 1];
    }
  }

  priority_queue<llint> Q;
  for (int i = 0; i < n; ++i) {
    Q.push(a[i]);
    if (Q.top() > a[i]) {
      sol += Q.top() - a[i];
      Q.pop();
      Q.push(a[i]);
    }
  }

  printf("%lld\n", sol);

  return 0;
}

Compilation message (stderr)

bulves.cpp: In function 'int main()':
bulves.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
bulves.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     scanf("%d%d", &x, &y);
      |     ~~~~~^~~~~~~~~~~~~~~~

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