#include <stdio.h>
int sum=0;
int ko=0;
int acc(int x) {
if(x>=0){
sum=sum+x;
ko++;
return sum;
}
if(x==-1){
sum=sum+0;
ko++;
return sum;
}
if(x==-2){
return ko;
}
if(x<=-3){
return -1;
}
}
int main(void) {
return 0;
}
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