Submission #1023099

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023099		hasan2006	Bigger segments (IZhO19_segments)	C++17	13 / 100	1 ms	4444 KiB

segments

#include <bits/stdc++.h>

using namespace std;

#define TL ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define rall(s) s.rbegin(),s.rend()
#define all(s) s.begin(),s.end()
#define pb push_back
#define se second
#define fi first
#define ll long long
#define ld long double
#define YES cout<<"YES\n"
#define Yes cout<<"Yes\n"
#define yes cout<<"yes\n"
#define NO cout<<"NO\n"
#define No cout<<"No\n"
#define no cout<<"no\n"


const int N = 5e5 + 9 , mod = 1e9 + 7;
ll a[N] , b[N] , dp[N] , c[N] , d[N] , ans[N] ;

void solve()
{
    ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
    cin>>n;
    for(i  = 1; i <= n; i++){
        cin>>a[i];
        b[i] = b[i - 1] + a[i];
    }
    for(i = 1; i <= n; i++){
        l = c[s];
        r = i - 1;
        if((b[i] - b[l]) >= dp[l]){
            l = c[s];
            r = i - 1;
            while(l != r){
            m = (l + r + 1) / 2;
            if((b[i] - b[m]) >= dp[m])
                l = m;
            else
                r = m - 1;
            }
            c[++s] = i;
            dp[i] = b[i] - b[l];
            d[i] = l;
        }else{
            l = d[i - 1];
            r = c[s] - 1;
            while(l != r){
                m = (l + r + 1) / 2;
                if((b[i] - b[m]) >= dp[m])
                    l = m;
                else
                    r = m - 1;
            }
            dp[i] = b[i] - b[l];
            d[i] = l;
        }
    }
    cout<<s<<"\n";
}

int main(){
    TL;

   /* #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif*/
    int t = 1;
//    cin>>t;
    while(t--)
     {
        solve();
     }
}
// Author : حسن

Compilation message (stderr)

segments.cpp: In function 'void solve()':
segments.cpp:26:12: warning: unused variable 'q' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |            ^
segments.cpp:26:20: warning: unused variable 'j' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                    ^
segments.cpp:26:30: warning: unused variable 'x' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                              ^
segments.cpp:26:34: warning: unused variable 'y' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                                  ^
segments.cpp:26:46: warning: unused variable 'f' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                                              ^
segments.cpp:26:50: warning: unused variable 'k' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                                                  ^
segments.cpp:26:58: warning: unused variable 'mn' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                                                          ^~
segments.cpp:26:69: warning: unused variable 'mx' [-Wunused-variable]
   26 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                                                                     ^~

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