Submission #694989

#	Time	Username	Problem	Language	Result	Execution time	Memory
694989		Nhoksocqt1	Studentsko (COCI14_studentsko)	C++17	100 / 100	3 ms	440 KiB

studentsko

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

#define inf 0x3f3f3f3f
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

int readInt() {
	bool minus = false;
	int result = 0;
	char ch;
	ch = getchar();
	while(true) {
		if(ch == '-') break;
		if(ch >= '0' && ch <= '9') break;
		ch = getchar();
	}

	if(ch == '-') minus = true; else result = ch - '0';
	while(true) {
		ch = getchar();
		if (ch < '0' || ch > '9') break;
		result = result * 10 + (ch - '0');
	}

	if(minus)
		return -result;
	else
		return result;
}

const int MAXN = 5003;

ii a[MAXN];
int b[MAXN], c[MAXN], nArr, k;

void process() {
    cin >> nArr >> k;
    for (int i = 1; i <= nArr; ++i) {
        cin >> a[i].fi;
        a[i].se = i;
        c[i] = 1e9+7;
    }

    c[0] = 1e9+7;
    sort(a + 1, a + nArr + 1);
    for (int i = 1; i <= nArr; ++i) {
        b[a[i].se] = (i + k - 1) / k;
    }

    int res(0);
    for (int i = 1; i <= nArr; ++i) {
        int pos = upper_bound(c + 1, c + nArr + 1, b[i]) - c;
        c[pos] = b[i];
        res = max(res, pos);
    }

    cout << nArr - res;
}

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

//    freopen("studentsko.inp", "r", stdin);
//    freopen("studentsko.out", "w", stdout);

    process();
    return 0;
}

Compilation message (stderr)

studentsko.cpp:6: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    6 | #pragma GCC optimization ("O3")
      | 
studentsko.cpp:7: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    7 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10