Submission #1276914

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276914		icebear	Money (IZhO17_money)	C++20	45 / 100	2 ms	580 KiB

money

// ~~ 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 "gen"

const int MOD = 1e9 + 7;
const int inf = 0x3f3f3f3f;
const ll INF = 1e18 + 27092008;
const int N = 300 + 5;
int n, a[N], f[N];

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

void process(void) {
    memset(f, 0x3f, sizeof f);
    f[0] = 0;
    FOR(i, 0, n) if (f[i] != inf) {
        minimize(f[i + 1], f[i] + 1);
        FOR(j, i + 2, n) {
            if (a[j-1] > a[j]) break;
            bool ok = true;
            FOR(x, 1, i) if (a[i+1] < a[x] && a[x] < a[j]) {
                ok = false;
                break;
            }
            if (!ok) break;
            minimize(f[j], f[i]+1);
        }
    }

    cout << f[n];
    FOR(i, 1, n) cerr << f[i] << ' '; cerr << '\n';
    cerr << f[n];
}

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)

money.cpp: In function 'int main()':
money.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
money.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 0 / 55