Submission #200703

#	Time	Username	Problem	Language	Result	Execution time	Memory
200703		BThero	Fireworks (APIO16_fireworks)	C++17	7 / 100	5 ms	376 KiB

fireworks

// Why am I so dumb? :c
// chrono::system_clock::now().time_since_epoch().count()
                                                  
#include<bits/stdc++.h>
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>

#define pb push_back
#define mp make_pair

#define all(x) (x).begin(), (x).end()

#define fi first
#define se second

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;   
typedef pair<int, int> pii;
//template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

const int MAXN = (int)5e2 + 5;

int par[MAXN], arr[MAXN];

int n, m;

ll f(int x) {
    ll ret = 0;
    
    for (int i = 1; i <= m; ++i) {
        ret += abs(x - arr[i]);
    }

    return ret;
}

void solve() {
    scanf("%d %d", &n, &m);

    for (int i = 1; i <= m; ++i) {
        scanf("%d %d", &par[i], &arr[i]);
    }

    sort(arr + 1, arr + m + 1);
    printf("%lld\n", min(f(arr[m / 2]), f(arr[(m + 1) / 2])));                                    
}

int main() {
    int tt = 1;

    while (tt--) {
        solve();
    }

    return 0;
}

Compilation message (stderr)

fireworks.cpp: In function 'void solve()':
fireworks.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
fireworks.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &par[i], &arr[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 0 / 19
• Subtask 3: 0 / 29
• Subtask 4: 0 / 45