Submission #1087754

#	Time	Username	Problem	Language	Result	Execution time	Memory
1087754		tradz	Financial Report (JOI21_financial)	C++14	12 / 100	58 ms	15416 KiB

Main

#include <bits/stdc++.h>

#define For(i,a,b) for(int i = a; i <= b; i++)
#define Ford(i,a,b) for(int i = a; i >= b; i--)
#define ll long long
#define ii pair<int,int>
#define fi first
#define se second
#define all(v) v.begin(),v.end()
#define RRH(v) v.resize(unique(all(v)) - v.begin())

using namespace std;
const int  N = 1e6+7;
const int M = 1e9+7;
const ll oo = 3e18;

int n, a[N], d, dp[N];
ii b[N];
int st[N];
stack<int> s;
int R[N];

void up(int id, int l, int r, int u, int v) {
    if (l > u or r < u) return;
    if (l == r) {
        st[id] = v;
        return;
    }
    int mid = l + r >> 1;
    up(id * 2, l, mid, u, v);
    up(id * 2 + 1, mid + 1, r, u, v);
    st[id] = max(st[id * 2], st[id * 2 + 1]);
}

int get(int id, int l, int r, int u, int v) {
    if (l > v or r < u) return 0;
    if (u <= l and r <= v) return st[id];
    int mid = l + r >> 1;
    return max(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0);

    #define TASK ""
    if (fopen (".inp", "r")) {
        freopen (".inp", "r", stdin);
        freopen (".out", "w", stdout);
    }
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    cin >> n >> d;
    vector<int> v;
    For (i, 1, n) cin >> a[i], b[i] = {a[i], i};
    Ford(i, n, 1) {
        while (s.size() && a[s.top()] <= a[i]) s.pop();
        if (s.size() == 0) R[i] = n + 1;
        else R[i] = s.top();
        s.push(i);
    }
    For (i, 1, n) dp[i] = 0;
    sort (b + 1, b + n + 1, [](ii a, ii b) {
        if (a.fi == b.fi) return a.se > b.se;
        return a.fi > b.fi;
    });
    memset(st, 0, sizeof st);
    queue<int> q;
    For (i, 1, n) {
        int pos = b[i].se;
        dp[pos] = dp[R[pos]] + 1;
        q.push(pos);
    }
    int ans = 0;
    For (i, 1, n) ans = max(ans, dp[i]);

    cout << ans << '\n';

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void up(int, int, int, int, int)':
Main.cpp:29:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |     int mid = l + r >> 1;
      |               ~~^~~
Main.cpp: In function 'int get(int, int, int, int, int)':
Main.cpp:38:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |     int mid = l + r >> 1;
      |               ~~^~~
Main.cpp: In function 'int main()':
Main.cpp:47:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen (".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:48:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen (".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
Main.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 12 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35