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solution.c
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solution.c
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#include <stdio.h>
#include <stdlib.h>
int XMIN = 0;
int ** arrs = 0;
void onePart(){
printf("Cena: 0\n");
}
void error() {
printf("Nespravny vstup.\n");
exit(1);
}
int recursion ( int *arr,int ind, int actSize,int actMin) {
int newSize = actSize-1;
int * newArr;// [actSize];
int j, i;
int min = 0;
if (!arrs)
{
arrs = (int**) malloc (actSize * sizeof(int*));
for (i = 0; i < actSize; ++i)
{
arrs[i] = (int*) malloc (actSize * sizeof(int));
}
}
if (ind == 0)
{
newArr = arr;
}
else
{
newArr = arrs[actSize-1];
}
if (ind != 0) {
//newArr = (int*) malloc (newSize * sizeof(int));
j=0;
for (i=0; i<actSize; i++) { /* copying elements of the old array to new SKIPPING one element! */
if (i!=ind) {
newArr[j] = arr[i];
j++;
}
}
}
else {
//newArr = arr; //(int*) malloc (actSize * sizeof(int));
// for (i=0; i<actSize; i++)
// newArr[i] = arr[i];
newSize = actSize;
}
for (i=1; i<newSize-1; i++){
min = newArr[i-1]*newArr[i+1];
if ( XMIN && ((min + actMin) >= XMIN))
break;
if (newSize == 3) {
if (XMIN) {
if ((actMin+min) < XMIN)
XMIN = min + actMin;
if(ind) ;
//free(newArr);
break;
}
else {
XMIN = actMin + min;
if(ind) ;
//free(newArr);
break;
}
}
if (!recursion(newArr, i, newSize, actMin+min)) {
if (i==newSize-2){
if (ind) ;
//free(newArr);
break;
}
}
}
//if (ind) ;
//free(newArr);
//free(arr);
if (!ind)
{
for (i = 0; i < actSize; ++i)
{
free(arrs[i]);
}
free(arrs);
}
return 0;
}
int main(void)
{ /*MAIN */
int c=0;
int *arr;
int i=0;
int actSize;
int sizeArr = 100;
int amount=0;
arr = (int*) malloc (sizeArr * sizeof(int));
printf("Zadejte pocty sroubu pro jednotlive priruby:\n");
while( c!='\n' && c != -1) {
if ( scanf("%d", &arr[i]) == 1) {
if (arr[i]>=1)
{
if (++i == sizeArr) {
sizeArr *= 2;
if (!realloc (arr, sizeArr)) {
// printf ("Error during the realloc");
free(arr);
exit(1);
}
}
c=getchar();
// printf("c: %d\n", c);
if (c != '\n' && c != ' ' && c != -1) {
free(arr);
error();
}
}
else
{
free(arr);
error();
}
}
else {
if (!feof(stdin))
{
free(arr);
error();
}
break;
/*printf("error: %d\n", feof(stdin));
c = getchar();
printf("c: %d\n", c);
while (c == ' ')
{
c = getchar();
printf("c: %d\n", c);
}
if (c != '\n' && c != -1)
{
free(arr);
error();
}*/
}
// printf("CCC: %d\n", c);
}
if(i<=1) {
free(arr);
error();
}
actSize = i;
/* printf("act=%d\n",actSize);*/
for(i=1;i<actSize-1;i++){ /*FINDING AN AMOUNT OF REMOVABLE ITEMS */
amount+=arr[i];
}
/*printf("total=%d\n",amount);*/
if(actSize==2){
onePart();
free(arr);
return 0;
}
if (!recursion (arr, 0, actSize,0)) {
printf ("Cena: %d\n", XMIN+amount);
}
free(arr);
return 0;
}