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@luccasiau
Created March 24, 2015 23:40
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#include <cstdio>
int main(){
int n;
while(true){ // varias entradas
scanf("%d", &n); // leia o valor de n
if(n==0) break; // se n=0, acabou a entrada
int pares=0; // declare pares=0
for(int i=1; i<=n; i++){ // para cada tipo de vareta
int c, v;
scanf("%d %d", &c, &v); // leia a quantidade de varetas desse comprimento
pares+=(v/2); // e adicione a pares a quantidade de pares desse comprimento de vareta que você pode formar
}
printf("%d\n", pares/2); // imprima a resposta
}
return 0;
}
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