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A0Q5V2.c
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A0Q5V2.c
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#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
void mex(int n, int v[]) {
int mex = 0;
int *mexArray = malloc((n+1)*sizeof(int));
for (int x=0;x<(n+1);x++){
mexArray[x]=-1;
}
for (int x=0;x<n;x++) {
if (v[x] >=n) continue;
else mexArray[v[x]]=v[x];
}
for (int x=0;x<(n+1);x++) {
if (mexArray[x] == -1) {
mex = x;
break;
}
}
printf("The minimum excluded integer is %d\n", mex);
}
int main(int argc, char *argv[]) {
char line[101];
int used = 0;
int capacity = 20;
int *numArray = malloc(capacity* sizeof(int));
if (argv[1] == NULL) {
while (fgets(line, 101, stdin) != NULL){
numArray[used] = atoi(line);
used++;
if (used == capacity) {
capacity *= 2;
numArray = realloc(numArray, capacity*sizeof(int));
}
}
}
else {
FILE *fFile;
fFile = fopen(argv[1],"r");
if (fFile == NULL) printf("File doesn't exist\n");
while (fgets(line, 101, fFile) != NULL){
numArray[used] = atoi(line);
used++;
if (used == capacity) {
capacity *= 2;
numArray = realloc(numArray, capacity*sizeof(int));
}
}
}
// for(int x = 0; x < used; x++) {
// printf("%d ",numArray[x]);
// }
// printf("\n");
mex(used,numArray);
free(numArray);
}