제출 #1136019

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1136019		Thanhs	Fountain (eJOI20_fountain)	C++20	0 / 100	13 ms	6840 KiB

fountain

#include <bits/stdc++.h>
using namespace std;

#define name "TENBAI"
#define fi first
#define se second
// #define int long long
#define endl '\n'
#define setmin(x, y) x = min((x), (y))
#define setmax(x, y) x = max((x), (y))
#define sqr(x) ((x) * (x))

mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count());
int rand(int l, int r){return l + ((hdp() % (r - l + 1)) + r - l + 1) % (r - l + 1);}

const int NM = 4e5 + 5;

vector<long long> nen;
int n, a[NM][10], pr[NM], A[NM];

int F(int i, int j)
{
    if (a[i][j / 2] == n + 1)
        return n + 1;
    if (j & 1)
        return a[a[i][j / 2] + 1][j / 2];
    return a[i][j / 2];
}

void solve()
{
    memset(pr, -1, sizeof pr);
    cin >> n;
    nen.push_back(0);
    long long cr = 0;
    for (int i = 1; i <= n; i++)
    {
        cin >> A[i];
        cr += A[i];
        nen.push_back(cr);
    }
    sort(nen.begin(), nen.end());
    nen.erase(unique(nen.begin(), nen.end()));
    for (int i = 1; i <= n + 1; i++)
        a[i][0] = n + 1;
    cr = 0;
    for (int i = 0; i <= n; i++)
    {
        cr += A[i];
        int t = lower_bound(nen.begin(), nen.end(), cr) - nen.begin();
        if (~pr[t])
            setmin(a[pr[t] + 1][0], i);
        pr[t] = i;
    }
    for (int i = n - 1; i >= 1; i--)
        setmin(a[i][0], a[i + 1][0]);
    for (int i = 2; (1 << i) <= n; i += 2)
        for (int j = 1; j <= n + 1; j++)
        {
            if (F(j, i - 1) == n + 1)
                a[j][i / 2] = n + 1;
            else
                a[j][i / 2] = F(F(j, i - 1) + 1, i - 1);
        }
    int q;
    cin >> q;
    while (q--)
    {
        int l, r;
        cin >> l >> r;
        int ans = 0;
        for (int i = __lg(n); i >= 0; i--)
            if (F(l, i) <= r)
            {
                ans += 1 << i;
                l = F(l, i) + 1;
            }
        cout << ans << endl;
    }
}

signed main()
{
    if (fopen("in.txt", "r")) 
    {
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    }
    else if (fopen(name".inp", "r"))
    {
        freopen(name".inp", "r", stdin);
        freopen(name".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
    int tc = 1; 
    // cin >> tc;
    while (tc--)
        solve();
}

컴파일 시 표준 에러 (stderr) 메시지

fountain.cpp: In function 'int main()':
fountain.cpp:86:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |         freopen("in.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:87:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |         freopen("out.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:91:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |         freopen(name".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40