Submission #41531

#	Time	Username	Problem	Language	Result	Execution time	Memory
41531		chonka	Art Exhibition (JOI18_art)	C++98	100 / 100	302 ms	12720 KiB

art

#include<iostream>
#include<stdio.h>
#include<algorithm>
using namespace std ;

#define MAXN 500007

int n ;
pair < long long , long long > a[ MAXN ] ;
long long pref[ MAXN ] ;

void input ( ) {
    scanf ( "%d" , &n ) ;
    int i ;
    for ( i = 1 ; i <= n ; i ++ ) {
        scanf ( "%lld%lld" , &a[ i ].first , &a[ i ].second ) ;
    }
    sort ( a + 1 , a + n + 1 ) ;
    for ( i = 1 ; i <= n ; i ++ ) {
        pref[ i ] = ( pref[ i - 1 ] + a[ i ].second ) ;
    }
}

void solve ( ) {
    int i ;
    long long mn = -a[ 1 ].first ;
    long long ans = 0 ;
    for ( i = 1 ; i <= n ; i ++ ) {
        if ( mn > pref[ i - 1 ] - a[ i ].first ) {
            mn = pref[ i - 1 ] - a[ i ].first ;
        }
        if ( ans < pref[ i ] - a[ i ].first - mn ) {
            ans = pref[ i ] - a[ i ].first - mn ;
        }
    }
    printf ( "%lld\n" , ans ) ;
}

int main ( ) {
    input ( ) ;
    solve ( ) ;
    return 0 ;
}

Compilation message (stderr)

art.cpp: In function 'void input()':
art.cpp:13:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ( "%d" , &n ) ;
                         ^
art.cpp:16:63: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf ( "%lld%lld" , &a[ i ].first , &a[ i ].second ) ;
                                                               ^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50