Submission #1276387

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276387		icebear	Financial Report (JOI21_financial)	C++20	48 / 100	668 ms	197232 KiB

Main

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

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;

template<class T>
    bool minimize(T &a, const T &b) {
        if (a > b) return a = b, true;
        return false;
    }

template<class T>
    bool maximize(T &a, const T &b) {
        if (a < b) return a = b, true;
        return false;
    }

#define FOR(i,a,b) for(int i=(a); i<=(b); ++i)
#define FORR(i,a,b) for(int i=(a); i>=(b); --i)
#define REP(i, n) for(int i=0; i<(n); ++i)
#define RED(i, n) for(int i=(n)-1; i>=0; --i)
#define MASK(i) (1LL << (i))
#define BIT(S, i) (((S) >> (i)) & 1)
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define task "icebear"

const int MOD = 1e9 + 7;
const int inf = 1e9 + 27092008;
const ll INF = 1e18 + 27092008;
const int N = 7000 + 5;
int n, D, a[N], f[N][N];
deque<int> dq[N];

void init(void) {
    cin >> n >> D;
    FOR(i, 1, n) cin >> a[i];
}

void process(void) {
    memset(f, -0x3f, sizeof f);
    FOR(i, 1, n) {
        maximize(f[i][i], 1);
        FOR(j, 1, n) {
            if(!dq[j].empty() && dq[j].front() < i - D) continue;
            if (!dq[j].empty())
                maximize(f[i][a[i] > a[j] ? i : j], f[dq[j].front()][j] + (a[i] > a[j]));
        }

        FOR(j, 1, n) {
            while(!dq[j].empty() && f[dq[j].back()][j] <= f[i][j]) dq[j].pop_back();
            dq[j].pb(i);
        }
    }
    cout << *max_element(f[n] + 1, f[n] + n + 1);
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int tc = 1;
//    cin >> tc;
    while(tc--) {
        init();
        process();
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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