제출 #343883

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
343883		IZhO_2021_I_want_Silver	Bigger segments (IZhO19_segments)	C++14	0 / 100	1 ms	364 KiB

segments

#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,sse3,sse4,popcnt,abm,mmx")

#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <set>
#include <map>
#include <iomanip>
#include <cassert>
#include <stack>
#include <queue>
#include <deque>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>-

using namespace std;
//using namespace __gnu_pbds;

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

// template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//  order_of_key (k) : Number of items strictly smaller than k .
//  find_by_order(k) : K-th element in a set (counting from zero).
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define pb push_back
#define ppb pop_back
#define mkp make_pair
#define F first
#define S second
#define lb lower_bound
#define ub upper_bound
#define show(a) cerr << #a <<" -> "<< a <<" "
#define nl cerr <<"\n"
#define int ll

const int N = 5e5 + 5;
const int oo = 1e9 + 5;

int n, a[N], sum[N], ans;

void solve() {
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i];
        sum[i] = sum[i-1] + a[i];
    }
    for (int i = 1; i <= n; ++i) {
        int pre = i, pre_sum = sum[i], res = 1;
        for (int j = i+1; j <= n; ++j) {
            //if (i == 2) { show(pre_sum); show(j); show(pre); show(sum[j] - sum[pre]); show(sum[n] - sum[j]); nl; }
            if (pre_sum <= sum[j] - sum[pre] && (j == n || sum[j] - sum[pre] <= sum[n] - sum[j])) {
                pre_sum = sum[j] - sum[pre];
                pre = j;
                ++res;
            }
            if (sum[j] - sum[pre] > sum[n] - sum[j]) { break; }
        }
        ans = max(ans, res);
    }
    cout << ans;
}

 main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tests = 1;
	//cin >> tests;
	while (tests --) {
		solve();
	}
	return 0;
}
/*
    Just Chalish!
*/

컴파일 시 표준 에러 (stderr) 메시지

segments.cpp:68:8: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   68 |  main () {
      |        ^

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