Submission #406891

#	Time	Username	Problem	Language	Result	Execution time	Memory
406891		LptN21	Studentsko (COCI14_studentsko)	C++14	100 / 100	3 ms	404 KiB

studentsko

#include <bits/stdc++.h>
using namespace std;
#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
#define FF first
#define SS second
#define pb push_back
#define sz(x) (int)x.size()
#define oo 1e9
#define eps 1e-9
#define PI acos(-1.0)
#define lb lower_bound
#define ub upper_bound
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> ii;
const int N = 5000+7, M=1000+7;
const int MOD = 1e9+7;

int n, m, k, t;

int a[N], mx=0, c[N];
ii b[N];

signed main() {
    //freopen("test.inp", "r", stdin);
    //freopen("test.out", "w", stdout);
    //fastIO;
    scanf("%d%d", &n, &m);
    for(int i=1;i<=n;i++) {
        scanf("%d", &a[i]);
        b[i]=ii(a[i], i);
    }
    sort(b+1, b+n+1);
    for(int i=1;i<=n;i++) a[b[i].SS]=(i-1)/m+1;
    for(int j, i=1;i<=n;i++) {
        j=ub(c+1, c+mx+1, a[i])-c;
        c[j]=a[i], mx=max(mx, j);
    }
    printf("%d", n-mx);
    return 0;
}
/* stuff you should look for
    - int overflow, array bounds
    - special cases (n=1?)
    - do smth instead of do nothing and stay organized
    - WRITE STUFF DOWN
    - DONT JUST STICK ON ONE APPROACH
*/

Compilation message (stderr)

studentsko.cpp: In function 'int main()':
studentsko.cpp:28:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
studentsko.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~

• 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