Submission #295728

#	Time	Username	Problem	Language	Result	Execution time	Memory
295728		CaroLinda	Strange Device (APIO19_strange_device)	C++14	10 / 100	5027 ms	524292 KiB

strange_device

#include <bits/stdc++.h>

#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimization ("O2")

#define lp(i,a,b) for(int i = a; i < b; i++)
#define pb push_back
#define sz(x) (int)(x.size())
#define all(x) x.begin(),x.end()
#define debug printf
#define tiii tuple<int,int,int>
#define mkt make_tuple
#define pii pair<int,int>
#define mk make_pair
#define ll long long
#define ff first
#define ss second

using namespace std ;

int N ;
set< pair<ll,ll> > s ;
ll A , B ;

int main()
{
    scanf("%d%lld%lld", &N , &A, &B ) ;
    for(int i = 1 ; i <= N ; i++ )
    {
        ll L , R ;
        scanf("%lld %lld", &L, &R ) ;
        for(ll j = L ; j <= R ; j++ )
        {
            ll x = (j + j/B)%A ;
            ll y = j%B ;
            s.insert(mk(x,y)) ;
        }
    }
    printf("%d\n" , sz(s)) ;
}

Compilation message (stderr)

strange_device.cpp:5: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    5 | #pragma GCC optimization ("unroll-loops")
      | 
strange_device.cpp:6: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    6 | #pragma GCC optimization ("O2")
      | 
strange_device.cpp: In function 'int main()':
strange_device.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   29 |     scanf("%d%lld%lld", &N , &A, &B ) ;
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |         scanf("%lld %lld", &L, &R ) ;
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30