Submission #257626

#	Time	Username	Problem	Language	Result	Execution time	Memory
257626		BThero	Bigger segments (IZhO19_segments)	C++17	37 / 100	1592 ms	3456 KiB

segments

// chrono::system_clock::now().time_since_epoch().count()
#include<bits/stdc++.h>

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << " = " << x << endl;

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

const int MAXN = (int)5e5 + 5;
const ll INF = (ll)1e16;

pair<int, ll> dp[MAXN];
ll pref[MAXN];
int arr[MAXN];
int n;

void solve() {
  scanf("%d", &n);
  
  for (int i = 1; i <= n; ++i) {
    scanf("%d", &arr[i]);
    pref[i] = pref[i - 1] + arr[i];
  }
  
  for (int i = 1; i <= n; ++i) {
    dp[i] = mp(0, INF);
  }
  
  dp[0] = mp(0, 0);
    
  for (int i = 1; i <= n; ++i) {
    int j = i - 1;
    
    while (dp[j].se + pref[j] > pref[i]) {
      --j;
    }
    
    dp[i].fi = dp[j].fi + 1;
    dp[i].se = pref[i] - pref[j];
    //T.pb(mp(dp[i].se + pref[i], i));
  }
  
  printf("%d\n", dp[n].fi);
}

int main() {
  int tt = 1;
  
  while (tt--) {
    solve();
  }

  return 0;
}

Compilation message (stderr)

segments.cpp: In function 'void solve()':
segments.cpp:26:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
   ~~~~~^~~~~~~~~~
segments.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &arr[i]);
     ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 14 / 14
• Subtask 3: 10 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27