Submission #891414

#	Time	Username	Problem	Language	Result	Execution time	Memory
891414		ClHg2	Potatoes and fertilizers (LMIO19_bulves)	C++14	24 / 100	69 ms	16984 KiB

bulves

#include <bits/stdc++.h>
#define EVAL(x) #x " = " << (x)

using std::cin;
using std::cout;
using i64 = int64_t;

auto main() -> int {
  std::ios_base::sync_with_stdio(false);
  cin.tie(nullptr);

  auto n = 0;
  cin >> n;

  auto a = std::vector<int>(n);
  for (auto i = 0; i < n; ++i) {
    auto x = 0, y = 0;
    cin >> x >> y;
    a[i] = x - y;
  }

  auto pre = std::vector<i64>(n + 1);
  for (auto i = 0; i < n; ++i) pre[i + 1] = pre[i] + a[i];
  auto suf = std::vector<i64>(n + 1);
  for (auto i = n - 1; ~i; --i) suf[i] = suf[i + 1] + a[i];

  auto ans = i64{0};
  for (auto i = 1; i < n; ++i) {
    if (pre[i] < 0)
      ans -= pre[i];
    else if (suf[i] < 0)
      ans -= suf[i];
  }
  cout << ans << "\n";
}

Compilation message (stderr)

bulves.cpp:2: warning: "EVAL" redefined
    2 | #define EVAL(x) #x " = " << (x)
      | 
<command-line>: note: this is the location of the previous definition

• Subtask 1: 24 / 24
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 36