Submission #882752

#	Time	Username	Problem	Language	Result	Execution time	Memory
882752		Bin	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	13 ms	5516 KiB

triusis

// OwO mãi simp tnqa >~< UwU
//#pragma GCC target ("avx2")
//#pragma GCC optimize("Ofast,fast-math,unroll-loops")
#include <bits/stdc++.h>
#define int long long
#define f first
#define si second
#define ll long long
#define ul unsigned long long
#define pb push_back
#define rep(i, a, b) for (int i = a; i <= b; ++i)
#define repp(i, a, b) for (int i = a; i >= b; --i)
#define TEST "TEST"

const ll maxn = 2e5 + 2;
//const ll oo = 1e18;
const ll oo = 0x3f3f3f3f3f3f3f3f;
const ll mod[] = {(ll) 1e9 + 7, (ll)1e9 + 2277, (ll)1e9 + 5277, (ll)1e9 + 8277, (ll)1e9+ 9277};
const ll MOD = 1e9 + 7;
//const int LOG = 30;
const ll base = 71;

using namespace std;

inline int readInt(){char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();int n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline ll readLong(){char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();ll  n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline ul readUL(){char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();ll  n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline string readString() {char c;while(c=getchar(),c==' '||c=='\n'||c=='\t');string s({c});while(c=getchar(),c!=EOF&&c!=' '&&c!='\n'&&c!='\t')s+=c;return s;}

int n, m, a[maxn], b[maxn], kq;

void sol(){
    n = readInt(); m = readInt();
    rep(i, 1, n){
        a[i] = readInt();
    }
    rep(i, 1, n){
       // if (i > 1 && a[i] < a[i - 1]){
          //  kq++; b[kq] = m * i - a[i];
          //  continue;
       // }
        if (m * i - a[i] < 0) continue;
        if (kq == 0){
            kq++; b[kq] = m * i - a[i];
        }
        else if (m * i - a[i] >= b[kq]){
            kq++; b[kq] = m * i - a[i];
        } else {
            int k = upper_bound(b + 1, b + kq + 1, m * i - a[i]) - b;
            b[k] = m * i - a[i];
        }
    }
    cout << n - kq;
}

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    if (fopen(TEST".INP","r")){
        freopen(TEST".INP","r",stdin);
        freopen(TEST".OUT","w",stdout);
    }
    int t; t = 1;
    while (t--){
        sol();
        cout << "\n";
    }
    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         freopen(TEST".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen(TEST".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37