Submission #545171

#	Time	Username	Problem	Language	Result	Execution time	Memory
545171		krit3379	Money (IZhO17_money)	C++17	100 / 100	1073 ms	58092 KiB

money

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#define N 1000005

int a[N],ma,ans;
set<int> s;

int main(){
    int n,i;
    scanf("%d",&n);
    for(i=1;i<=n;i++)scanf("%d",&a[i]);
    s.insert(N);
    ma=N;
    ans=1;
    for(i=1;i<=n;i++){
        if(a[i]==a[i-1])continue;
        auto it=s.lower_bound(a[i]);
        if(a[i]<a[i-1]||ma!=*it){
            ans++;
            ma=*s.upper_bound(a[i]);
        }
        s.insert(a[i]);
    }
    printf("%d",ans);
    return 0;
}

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
money.cpp:13:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     for(i=1;i<=n;i++)scanf("%d",&a[i]);
      |                      ~~~~~^~~~~~~~~~~~

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