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1242-uri.c
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1242-uri.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#define TAMANHOBUF 300
char pilha[TAMANHOBUF];
static int top = 0;
bool vazia() {
if(top == 0)
return true;
else
return false;
}
bool cheia() {
if(top == TAMANHOBUF)
return true;
else
return false;
}
char verifica(){
return pilha[top];
}
char pop(){
int data;
if(!vazia()){
data = pilha[top];
top = top - 1;
return data;
}
}
char push(char data){
if(!cheia()) {
top = top + 1;
pilha[top] = data;
}
}
bool go (char a, char b){
if ((a == 'S' && b == 'B') || (a == 'B' && b == 'S')) return true;
if ((a == 'C' && b == 'F') || (a == 'F' && b == 'C')) return true;
return false;
}
void achar_max (char* acido){
int soma = 0, i;
for (i=0; i<strlen(acido); i++){
if (vazia()){
push (acido[i]);
}
else if(cheia()){
break;
}
else if (go (acido[i], verifica())){
pop(pilha);
soma++;
}
else {
push(acido[i]);
}
}
printf("%d\n", soma);
}
int main (){
char acido[TAMANHOBUF];
while(scanf("%s", acido) != EOF){
top = 0;
memset(pilha, 0, sizeof pilha);
if(strcmp(acido, "\n") != 0){
achar_max(acido);
}
}
return 0;
}