Submission #1152620

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152620		YSH2020	Sjeckanje (COCI21_sjeckanje)	C++20	0 / 110	1 ms	320 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
  int n; cin >> n;
  int q; cin >> q;
  int a[n]; for (int i = 0; i < n; i++ )cin >> a[i];
  int d[n]; for (int i = 0; i < n-1; i++) d[i] = a[i+1]-a[i];
  d[n-1] = 0;
  while (q--) {
    int s, e, c; cin >> s >> e >> c;
    if (s >= 2) d[s-2]+=c;
    d[e-1]-= c;
    int ans = 0;
    int cur = d[0];
    //two cases: take first, dont take first
    for (int i = 1; i < n-1; i++) {
      if (abs(cur+d[i]) > abs(cur)) {
        //take it
        cur += d[i];
      }
      else {
        ans += abs(cur);
        cur = 0;
      }
    }
    ans += abs(cur);
    //case 2: dont take first
    int ans2 = 0;
    cur = 0;
    for (int i = 1; i < n-1; i++) {
      if (abs(cur+d[i]) > abs(cur)) {
        cur += d[i];
      }
      else {
        ans2 += abs(cur);
        cur = 0;
      }
    }ans2 += abs(cur);
    cout << max(ans, ans2) << '\n';
  }
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 55