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- #include <iostream>
- using namespace std;
- int main(){
- ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
- long long ans=0, a, sign=-1; cin >> a;
- if(a>0) sign=1;
- while(a){
- cin >> a;
- if(a*sign<0){
- ++ans;
- sign*=-1;
- }
- }
- cout << ans;
- return 0;
- }
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