Submission #963966

#	Time	Username	Problem	Language	Result	Execution time	Memory
963966		Aiperiii	Money (IZhO17_money)	C++14	45 / 100	441 ms	69148 KiB

money

#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    int n;
    cin>>n;
    vector <int> a(n+1);
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    vector <vector <int> > vec;
    vector <int> v;
    for(int i=1;i<=n;i++){
        if(a[i]>=a[i-1]){
            v.pb(a[i]);
        }
        else{
            vec.pb(v);
            v.clear();
            v.pb(a[i]);
        }
    }
    vec.pb(v);
    multiset <int> ms;
    for(auto x : vec[0])ms.insert(x);
    int ans=1;
    for(int i=1;i<vec.size();i++){
        int pos=0;
        while(pos<vec[i].size()){
            int x=vec[i][pos];
            auto it=ms.upper_bound(x);
            int up=*it;
            if(it==ms.end()){
                ans++;
                for(int j=pos;j<vec[i].size();j++)ms.insert(vec[i][pos]);
                break;
            }
            else{
                auto it=upper_bound(all(vec[i]),up);
                ans++;
                int new_pos=it-vec[i].begin();
                for(int j=pos;j<new_pos;j++)ms.insert(vec[i][pos]);
                pos=new_pos;
            }
        }
    }
    cout<<ans<<"\n";
}

/*
6
3 6 4 5 1 2
*/

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:33:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i=1;i<vec.size();i++){
      |                 ~^~~~~~~~~~~
money.cpp:35:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         while(pos<vec[i].size()){
      |               ~~~^~~~~~~~~~~~~~
money.cpp:41:32: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |                 for(int j=pos;j<vec[i].size();j++)ms.insert(vec[i][pos]);
      |                               ~^~~~~~~~~~~~~~

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