Submission #171295

#	Time	Username	Problem	Language	Result	Execution time	Memory
171295		juggernaut	Money (IZhO17_money)	C++14	0 / 100	4 ms	504 KiB

money

//Just try and the idea will come!
#include<bits/stdc++.h>
#define int long long int
using namespace std;
int n,i,nxt[1000001],prv[1000001],a[1000001],b[1000001],ans,x,y;
main(){
    scanf("%lld",&n);
    for(i=1;i<=n;i++){
        scanf("%lld",&a[i]);
        b[i]=a[i];
    }
    a[0]=1e15;
    sort(b+1,b+1+n);
    for(i=1;i<n;i++)nxt[b[i]]=b[i+1],prv[b[i+1]]=b[i];
    i=n;
    while(i>1){
        x=nxt[i];
        while(prv[a[i]]==a[i-1])i--;
        prv[x]=prv[i];
        nxt[i]=nxt[x];
        ans++;
        i--;
    }
    printf("%lld",ans);
}

Compilation message (stderr)

money.cpp:6:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
money.cpp: In function 'int main()':
money.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~
money.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&a[i]);
         ~~~~~^~~~~~~~~~~~~~

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