Cod sursa(job #844614)

Utilizator elfusFlorin Chirica elfus Data 29 decembrie 2012 16:36:32
Problema Garaj Scor 50
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.54 kb
#include <stdio.h>
#include <algorithm>

using namespace std;

struct tractor //Fane Tractoristul
{
    int C, T;
} x[100100];

inline bool comp(tractor A, tractor B)
{
    return (double)A.C / A.T > (double)B.C / B.T;
}

int solve(int T, int N, int M)
{
    int i;

    for (i = 1; i <= N; i ++)
    {
        if (M - x[i].C * (T / x[i].T) <= 0)
            return i;
        M = M - x[i].C * (T / x[i].T);
    }

    return -1;
}

bool comp2(int A, int B)
{
    return A > B;
}

int solve2(int val, int N, int M)
{
    int newx[100100], i;

    for (i = 1; i <= N; i ++)
        newx[i] = x[i].C * (val / x[i].T);
    sort(newx + 1, newx + N + 1, comp2);

    for (i = 1; i <= N + 1; i ++)
    {
        if (M <= 0)
            return i - 1;
        M = M - newx[i];
    }
}

int main()
{
    int i, N, M, cmax = 0, tx;
    double rep = 0;

    freopen("garaj.in", "r", stdin);
    freopen("garaj.out", "w", stdout);

    scanf("%d%d", &N, &M);
    for (i = 1; i <= N; i ++)
    {
        scanf("%d%d", &x[i].C, &x[i].T);
        x[i].T = x[i].T * 2;
        if ((double)x[i].C / x[i].T - rep > 0.00000001)
            rep = x[i].C / x[i].T, cmax = x[i].C, tx = x[i].T;
    }

    sort(x + 1, x + N + 1, comp);

    int st = 1, dr = 1 << 25, med, ret;

    while (st <= dr)
    {
        med = (st + dr) / 2;
        if (solve(med, N, M) != -1)
            ret = med, dr = med - 1;
        else
            st = med + 1;
    }

    printf("%d %d", ret, solve2(ret, N, M));
    return 0;
}