Submission #877059

#	Time	Username	Problem	Language	Result	Execution time	Memory
877059		Arpi2007	Bigger segments (IZhO19_segments)	C++14	73 / 100	30 ms	11128 KiB

segments

#include <iostream>
#include <queue>
#include <fstream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <set>
#include <map>
#include <utility>
#include <stack>
#include <math.h>
#include <climits>
#include <stdlib.h>
#include <stdio.h>
#include <iomanip>
#include <assert.h>
using namespace std;
 
#define ll long long
#define ld long double
#define ull unsigned long long
#define ub upper_bound
#define lb lower_bound 
#define ff first
#define ss second
#define mpr make_pair
#define vi vector<int>
#define vll vector<ll>
#define pii pair<int,int>
#define vpi vector<pii>
#define pb push_back
#define pob pop_back
#define mii map<int,int>
#define vpl vector<pair<ll, ll>>
#define pll pair<ll,ll>
#define all(v) v.begin(),v.end()
#define sz(x) x.size()
#define clr(x) x.clear()
#define yes cout << "YES\n"
#define no cout << "NO\n"
#define print(x) cout<<"x="<<x<<endl;
 
ll MOD = 1e9 + 7;
ll MOD2 = 998244353;
 
void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}
 
void setprecision(int x) {
 
    cout.setf(ios::fixed | ios::showpoint);
    cout.precision(x);
}
 
/*void setIO(string name = "") {
    if ((int)name.size() > 0) {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}*/
 
ll gcd(ll a, ll b)
{
    if(b == 0) {
            return a;
    }
    else {
        return gcd(b, a % b);
    }
}
 
int qannum(int n) {
    ll ans = 0;
    while (n != 0) {
        ans++;
        n /= 10;
    }
    return ans;
}
 
ll lcm(ll a, ll b) {
    return (a * b) / gcd(a, b);
}
 
 
ll factorial(ll n) {
    ll ans = 1;
    for (int i = 1; i <= n; i++) {
        ans *= i;
        ans %= MOD2;
    }
    return ans;
}
 
bool isPrime(int n)
{
    if (n <= 1) {
        return false;
    }
    if (n == 2) {
        return true;
    }
    for (int i = 2; i * i <= n; i++) {
        if (n % i == 0)
            return false;
    }
    return true;
}
 
int sumnum(int n) {
    int ans = 0;
    while (n != 0) {
        ans += n % 10;
        n /= 10;
    }
    return ans;
}
 
ll bpow_mod(ll a, ll b, ll mod)
{
	ll ans = 1;
	while (b) {
		if ((b & 1) == 1) {
			ans *= a;
			ans %= mod;
		}
		b >>= 1;
		a *= a;
		a %= mod;
	}
	return ans;
}
 
bool sortbysec(const pair<int, int>& a,
    const pair<int, int>& b)
{
    return (a.second < b.second);
}

ll factoriall(ll n, int j) {
    ll ans = 1;
    for (int i = j; i <= n; i++) {
        ans *= i;
        ans %= MOD2;
    }
    return ans;
}
 
void precalc(){
    return;
}

const int N = 2e5 + 10;
pair<int,ll> dp[N];
ll a[N];

void solve() {
    int n;
    cin >> n;
    for(int i = 1; i <= n; ++i){
        cin >> a[i];
        a[i] += a[i - 1];
    }
    dp[0].ff = 1;
    for(int i = 1; i <= n; ++i){
        dp[i] = max(dp[i], dp[i - 1]);
        auto ind = lb(a + 1, a + n + 1, 2 * a[i] - dp[i].ss) - a;
        dp[ind] = max(dp[ind],{ dp[i].ff + 1, a[i]});
    }
    cout << dp[n].ff;
}

 
 
void cases() {
    int t;
    cin >> t;
    while (t--) {
        solve();
    }
}
 
int main() {
    //setIo
    fastio();
    precalc();
    //cases();
    solve();
    return 0;
}

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