Submission #62687

#	Time	Username	Problem	Language	Result	Execution time	Memory
62687		eriksuenderhauf	Job Scheduling (CEOI12_jobs)	C++11	80 / 100	564 ms	33792 KiB

jobs

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define enl printf("\n")
#define ni(n) scanf("%d", &(n))
#define pri(n) printf("%d\n", (n))
#define pii pair<int, int>
#define vi vector<int>
#define pb push_back
#define fi first
#define se second
using namespace std;
const int INF = 1e9 + 7;
const int MAXN = 1e6 + 50;
pii a[MAXN];
vi ans[MAXN / 10];
int n, m, d, vis[MAXN];

bool ok(int mi)
{
    int r = 1;
    for (int i = 1; i <= n; i++)
    {
        int tmp = min(m - r + 1, mi);
        for (int j = 0; j < mi && j + r <= m; j++)
        {
            if (a[j + r].fi + d < i)
                return false;
            if (a[j + r].fi > i)
            {
                tmp = j;
                break;
            }
        }
        r += tmp;
    }
    if (r < m)
        return false;
    return true;
}

int main()
{
    ni(n), ni(d), ni(m);
    for (int i = 1; i <= m; i++)
        ni(a[i].fi), a[i].se = i;
    sort(a + 1, a + m + 1);
    int lo = 1, hi = m, ans2 = INF;
    while (lo <= hi)
    {
        int mi = (lo + hi) / 2;
        if (ok(mi))
            hi = mi - 1, ans2 = min(mi, ans2);
        else
            lo = mi + 1;
    }
    int r = 1;
    for (int i = 1; i <= n; i++)
    {
        int tmp = min(m - r + 1, ans2);
        for (int j = 0; j < ans2 && j + r <= m; j++)
        {
            if (a[j + r].fi > i)
            {
                tmp = j;
                break;
            }
            ans[i].pb(a[j + r].se);
        }
        r += tmp;
    }
    pri(ans2);
    for (int i = 1; i <= n; i++, printf("0\n"))
        for (int j: ans[i])
        {
            if (vis[j])
                continue;
            vis[j] = 1;
            printf("%d ", j);
        }
    return 0;
}

Compilation message (stderr)

jobs.cpp: In function 'int main()':
jobs.cpp:43:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     ni(n), ni(d), ni(m);
                 ^
jobs.cpp:43:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
jobs.cpp:43:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
jobs.cpp:45:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         ni(a[i].fi), a[i].se = i;
                    ^

• Subtask 1: 80 / 100