#include <iostream>
#include <set>
using namespace std;
int main(){
int n;
cin >> n;
multiset<long long> sprats;
long long w;
for (int i = 0; i < n; ++i){
cin >> w;
sprats.insert(w);
}
int q;
cin >> q;
for (int i = 0; i < q; ++i){
int type;
cin >> type;
if (type == 1){
long long s, k;
cin >> s >> k;
if (s >= k){
cout << 0 << endl;
continue;
}
multiset<long long> spratsTmp(sprats);
multiset<long long>::iterator firstInaccessible = spratsTmp.lower_bound(s);
if (firstInaccessible == spratsTmp.begin()){
cout << -1 << endl;
continue;
}
long long eatenCount = 0;
multiset<long long>::iterator currentToEat = prev(firstInaccessible);
for (;;){
s += *currentToEat;
++eatenCount;
if (s >= k){
cout << eatenCount << endl;
break;
}
currentToEat = spratsTmp.erase(currentToEat);
// firstInaccessible = currentToEat;// repair broken iterator
while (firstInaccessible != spratsTmp.end() && s > *firstInaccessible){
++firstInaccessible;
}
if (firstInaccessible == spratsTmp.begin()){
cout << -1 << endl;
break;
}
currentToEat = prev(firstInaccessible);
}
}
else if (type == 2){
cin >> w;
sprats.insert(w);
}
else{// type == 3
cin >> w;
sprats.erase(w);
}
}
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | #include <iostream> #include <set> using namespace std; int main(){ int n; cin >> n; multiset<long long> sprats; long long w; for (int i = 0; i < n; ++i){ cin >> w; sprats.insert(w); } int q; cin >> q; for (int i = 0; i < q; ++i){ int type; cin >> type; if (type == 1){ long long s, k; cin >> s >> k; if (s >= k){ cout << 0 << endl; continue; } multiset<long long> spratsTmp(sprats); multiset<long long>::iterator firstInaccessible = spratsTmp.lower_bound(s); if (firstInaccessible == spratsTmp.begin()){ cout << -1 << endl; continue; } long long eatenCount = 0; multiset<long long>::iterator currentToEat = prev(firstInaccessible); for (;;){ s += *currentToEat; ++eatenCount; if (s >= k){ cout << eatenCount << endl; break; } currentToEat = spratsTmp.erase(currentToEat); // firstInaccessible = currentToEat;// repair broken iterator while (firstInaccessible != spratsTmp.end() && s > *firstInaccessible){ ++firstInaccessible; } if (firstInaccessible == spratsTmp.begin()){ cout << -1 << endl; break; } currentToEat = prev(firstInaccessible); } } else if (type == 2){ cin >> w; sprats.insert(w); } else{// type == 3 cin >> w; sprats.erase(w); } } return 0; } |
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