Submission #875663

#	Time	Username	Problem	Language	Result	Execution time	Memory
875663		Isam	Art Exhibition (JOI18_art)	C++17	0 / 100	6 ms	348 KiB

art

#include<bits/stdc++.h>

#define SPEED ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define int unsigned long long
#define a first
#define b second
#define pii pair<int, int>
using namespace std;

const int sz = 2e5 + 5;

const int inf = 1e9 + 7;

int n, ans;

pii c[sz];

bool check(int d){
    int cnt(0);
    for(register int i = 0; i <= 20; ++i){
        if(d & (1LL << i)) ++cnt;
    }
    return cnt >= 2;
}


signed main(){
    SPEED;
    cin >> n;
    for(register int i = 1; i <= n; ++i){
        cin >> c[i].a >> c[i].b;
    }
    for(register int mask = 1; mask < (1LL << n); ++mask){
        int s(0), mxa(0), mna{inf};
        
        if(!check(mask)) continue;
        
        for(register int i = 1; i <= n; ++i){
            if(mask & (1LL << (i-1))){
                s += c[i].b;
                mxa = max(mxa, c[i].a), mna = min(mna, c[i].a);
            }
        }
        int dif = mxa - mna;
        if(dif > s) continue;
        ans = max(ans, s - dif);
    }
    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'bool check(long long unsigned int)':
art.cpp:20:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   20 |     for(register int i = 0; i <= 20; ++i){
      |                      ^
art.cpp: In function 'int main()':
art.cpp:30:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   30 |     for(register int i = 1; i <= n; ++i){
      |                      ^
art.cpp:33:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   33 |     for(register int mask = 1; mask < (1LL << n); ++mask){
      |                      ^~~~
art.cpp:33:37: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   33 |     for(register int mask = 1; mask < (1LL << n); ++mask){
      |                                ~~~~~^~~~~~~~~~~~
art.cpp:38:26: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   38 |         for(register int i = 1; i <= n; ++i){
      |                          ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50