Submission #191344

#	Time	Username	Problem	Language	Result	Execution time	Memory
191344		Ruxandra985	Kitchen (BOI19_kitchen)	C++14	0 / 100	27 ms	1148 KiB

kitchen

#include <bits/stdc++.h>
#define DIMN 310

using namespace std;
int a[DIMN] , b[DIMN];
int v[DIMN] , tt[DIMN * DIMN] , ok[DIMN * DIMN];
int n , k;
int maybe (int sum){

    int nod , elem , solved , poz , i , put , outof;
    nod = sum;
    elem = 0;
    while (nod){
        v[++elem] = tt[nod];
        nod = nod - b[tt[nod]];
    }

    /// v e lista pe care vreau eu sa o am , cu suma fixa sum
    /// eu la suma asta am maximizat nr de elem distincte
    solved = 0;
    int s = 0;
    for (i=1;i<=elem;i++){
        if (b[v[i]] > n)
            solved++;
        else s += b[v[i]];
    }
    if (s / n + solved >= k)
        return 1;
    return 0;
}
int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    int m , sum , i , val , sol;
    fscanf (fin,"%d%d%d",&n,&m,&k);
    sum = 0;
    for (i=1;i<=n;i++){
        fscanf (fin,"%d",&a[i]);
        sum += a[i];
        if (a[i] < k){
            fprintf (fout,"impossible");
            return 0;
        }
    }
    sort (a + 1 , a + n + 1);
    for (i=1;i<=m;i++){
        fscanf (fin,"%d",&b[i]);
    }
    sort (b + 1 , b + m + 1);

    /// ai putea face un rucsac asa de idee
    ok[0] = 1;
    tt[0] = -1;

    for (i = 1 ; i <= m ; i++ ){
        for (val = 300 * 300 ; val - b[i] >= 0 ; val--){
            if (!ok[val] && ok[val - b[i]]){
                ok[val] = 1;
                tt[val] = i;
            }
        }
    }
    /// 300 ^ 3
    sol = 2000000000;

    for (val = sum ; val <= 300 * 300 ; val++){

        if (ok[val] && maybe(val)){
            sol = min (sol , val - sum);
            break;
        }

    }
    if (sol == 2000000000){
        fprintf (fout,"impossible");
    }
    else {
        fprintf (fout,"%d",sol);
    }
    return 0;
}

Compilation message (stderr)

kitchen.cpp: In function 'int maybe(int)':
kitchen.cpp:10:31: warning: unused variable 'poz' [-Wunused-variable]
     int nod , elem , solved , poz , i , put , outof;
                               ^~~
kitchen.cpp:10:41: warning: unused variable 'put' [-Wunused-variable]
     int nod , elem , solved , poz , i , put , outof;
                                         ^~~
kitchen.cpp:10:47: warning: unused variable 'outof' [-Wunused-variable]
     int nod , elem , solved , poz , i , put , outof;
                                               ^~~~~
kitchen.cpp: In function 'int main()':
kitchen.cpp:36:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf (fin,"%d%d%d",&n,&m,&k);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
kitchen.cpp:39:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf (fin,"%d",&a[i]);
         ~~~~~~~^~~~~~~~~~~~~~~~
kitchen.cpp:48:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf (fin,"%d",&b[i]);
         ~~~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 28