Submission #897608

#	Time	Username	Problem	Language	Result	Execution time	Memory
897608		_unknown_2010	Money (IZhO17_money)	C++17	0 / 100	0 ms	456 KiB

money

//#ifndef LOCAL
//#pragma GCC optimize ("Ofast")
//#pragma GCC optimize ("unroll-loops")
//#endif

#include <bits/stdc++.h>
using namespace std;
using vecp = vector<pair<int,int>>;
#define vecm(a,n,m) vector<vector<int>>a(n,vector<int>(m,0));
#define int int64_t
#define pb  push_back
#define pii pair<int,int>
#define vi vector<int>
#define vii vector<pii>
#define mpii map<int,int>
#define lb lower_bound
#define ub upper_bound
#define foor(i,a,b) for(int i=a;i<b; i++)
#define foor(i,a) foor(i,0,a)
#define ins insert
#define ss second
#define ff first
#define until(x, a) for (auto x : a)
#define ln(x) int(x.size())
#define all(x) (x).begin(), (x).end()
#define seea(a,n) for(int i=0;i<n;i++){cin>>a[i];}
#define seev(v,n) for(int i=0;i<n;i++){int x; cin>>x; v.push_back(x);}
const int mod = 1E9+7;
const int MAXN=200000;
const int inf=1e18;
vector<vector<int>> g;
void solution(){
    int n;
    cin >> n;
    int a[n];
    for(int i=0; i<n; i++){
        cin >> a[i];
    }
    vi k;
    g.assign(n+1,{});
    int ind=0;int cnt=0;
    for(int i=0; i<n; i++){
        if(k.size()>0 && i==n-1){
            if(k.size()>=1){
                k.push_back(a[i]);
                a[i]=0;
                cnt++;
                g[ind]=k;
            }
            k.clear();
        }
        if(a[i]+1==a[i+1]){
            k.push_back(a[i]);
            a[i]=0;
        }
        else {
            if(k.size()>=1){
                k.push_back(a[i]);
                a[i]=0;
                cnt++;
                g[ind]=k;
                ind++;
            }
            k.clear();
        }
    }
    for(int i=0; i<n; i++){
        if(a[i]==0)continue;
        if(i==n-1){
            cnt++;continue;
        }
        if(a[i]!=0 && a[i+1]==0){
            cnt++;continue;
        }
        if(a[i]>a[i+1]){
            cnt++;
            continue;
        }
        for(int j=0; j<n; j++){
            if(g[j].size()==0)continue;
            if(g[j][0]-1==a[i] && g[j].back()+1==a[i+1]){
                i++;
                break;
            }
        }
        cnt++;
    }
    cout << cnt;
    // 1 2 3 4 5
    // 1 4 0 0 5
}
int32_t main(){
    clock_t tStart = clock();
    std::ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int q = 1; // cin >> q;
    while(q--) {
        solution();
        cout << '\n';
    }
    cerr<<fixed<<setprecision(3)<<"\nTime Taken: "<<(double)(clock()- tStart)/CLOCKS_PER_SEC<<endl;
}
/*

██╗  ██╗ █████╗  ██████╗     ██╗██╗   ██╗ ██████╗████████╗
██║░░██║██╔══██╗██╔════╝░░░░░██║██║░░░██║██╔════╝╚══██╔══╝
███████║██║░░██║╚█████╗░░░░░░██║██║░░░██║╚█████╗░░░░██║░░░
██╔══██║██║░░██║░╚═══██╗██╗░░██║██║░░░██║░╚═══██╗░░░██║░░░
██║░░██║╚█████╔╝██████╔╝╚█████╔╝╚██████╔╝██████╔╝░░░██║░░░
╚═╝░░╚═╝░╚════╝░╚═════╝░░╚════╝░░╚═════╝░╚═════╝░░░░╚═╝░░░
*/

Compilation message (stderr)

money.cpp:19: warning: "foor" redefined
   19 | #define foor(i,a) foor(i,0,a)
      | 
money.cpp:18: note: this is the location of the previous definition
   18 | #define foor(i,a,b) for(int i=a;i<b; i++)
      |

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