Submission #129024

#	Time	Username	Problem	Language	Result	Execution time	Memory
129024		PeppaPig	Cake 3 (JOI19_cake3)	C++14	0 / 100	2 ms	376 KiB

cake3

#include <bits/stdc++.h>
 
#define long long long
#define pii pair<long, long>
#define x first
#define y second
 
using namespace std;
 
const int N = 2e5+5;
 
int n, m;
pii v[N];
long ans = -1e18;
 
int main() {
    scanf("%d %d", &n, &m);
    for(int i = 1; i <= n; i++) scanf("%lld %lld", &v[i].x, &v[i].y);
    sort(v + 1, v + n + 1, [&](const pii &a, const pii &b) {
        return a.y < b.y;    
    });
    for(int i = 1; i <= n - m + 1; i++) {
        multiset<pii, greater<pii> > S;
        long ret = v[i].x + v[i + m - 1].x;
        for(int j = 1; j <= m - 2; j++) ret += v[i + j].x;
        ret -= 2 * (v[i + m - 1].y - v[i].y);
        ans = max(ans, ret);
    }
    printf("%lld\n", ans);
 
    return 0;
}

Compilation message (stderr)

cake3.cpp: In function 'int main()':
cake3.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
cake3.cpp:18:38: 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("%lld %lld", &v[i].x, &v[i].y);
                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 19
• Subtask 3: 0 / 76