Submission #129008

#	Time	Username	Problem	Language	Result	Execution time	Memory
129008		PeppaPig	Cake 3 (JOI19_cake3)	C++14	0 / 100	3 ms	376 KiB

cake3

#include <bits/stdc++.h>

#define long long long
#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 2e5+5;

int n, m;
long v[N], c[N], ans;

int main() {
    scanf("%d %d", &n, &m);
    for(int i = 1; i <= n; i++) scanf("%lld %lld", v + i, c + i);
    for(int i = 1; i <= n; i++) {
        multiset<pii> S;
        for(int j = i + 1; j <= n; j++) {
            if(S.size() >= m - 2) {
                long ret = 0;
                auto it = S.begin();
                for(int i = 0; i < m - 2; i++, it++)
                    ret += it->x;
                ret -= 2 * (c[j] - c[i]);
                ret += v[i] + v[j];
                ans = max(ans, ret);
            }
            S.emplace(v[j], c[j]);
        }
    }
    printf("%lld\n", ans);

    return 0;
}

Compilation message (stderr)

cake3.cpp: In function 'int main()':
cake3.cpp:21:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if(S.size() >= m - 2) {
                ~~~~~~~~~^~~~~~~~
cake3.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
cake3.cpp:17:38: 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, c + i);
                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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