Submission #229341

#	Time	Username	Problem	Language	Result	Execution time	Memory
229341		DodgeBallMan	Money (IZhO17_money)	C++14	0 / 100	5 ms	384 KiB

money

#include <bits/stdc++.h>

using namespace std;

const int N = 1e6 + 10;
int n, a[N], s[N], cnt, ans;
set<int> se;
void process( int idx ) {
    //printf("%d\n",idx);
    int l = s[idx], r = s[idx+1] - 1;
    //printf("L : %d R : %d\n",l,r);
    while( l < r ) {
        int mid = l + r + 1 >> 1;
        //printf("MID : %d %d\n",mid,s[mid]);
        if( se.upper_bound( a[s[idx]] ) == se.lower_bound( a[mid] ) ) l = mid;
        else r = mid - 1;
    }
    for( int i = s[idx] ; i <= l ; i++ ) se.insert( a[i] );
    s[idx] = l + 1;
    //printf("L : %d\n",l);
    ans++;
    return ;
}

int main()
{
    scanf("%d",&n);
    for( int i = 1 ; i <= n ; i++ ) scanf("%d",&a[i]);
    a[0] = 2e9;
    for( int i = 1 ; i <= n ; i++ ) if( a[i] < a[i-1] ) s[++cnt] = i;
    s[++cnt] = n+1;
    /*for( int i = 1 ; i <= cnt ; i++ ) printf("%d ", s[i]);
    printf("\n");*/
    for( int i = 1 ; i < cnt ; i++ ) {
        do{
            process( i );
        }while( s[i] < s[i+1] );
    }
    printf("%d",ans);
    return 0;
}

Compilation message (stderr)

money.cpp: In function 'void process(int)':
money.cpp:13:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = l + r + 1 >> 1;
                   ~~~~~~^~~
money.cpp: In function 'int main()':
money.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
money.cpp:28:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for( int i = 1 ; i <= n ; i++ ) scanf("%d",&a[i]);
                                     ~~~~~^~~~~~~~~~~~

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