#include <bits/stdc++.h> using namespace std; #define pb push_back #define ll long long #define vi vector<int> #define vvi vector<vi> #define vll vector<ll> #define mp make_pair #define fi first #define se second #define PII pair<int,int> #define vPII vector<PII> int t, n; string s; // 00000000010000000000100000000000000000000000001000000000000000000000000000000000000000001 int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cin >> t; while (t--) { vPII v; int sick = 0; cin >> n >> s; s.append("1"); int buf = 0; for (char i : s) { if (i == '1') { if (buf > 0) { v.push_back(make_pair(buf, 0)); buf = 0; } sick++; } else buf += 1; } sick--; if (s[0] == '0') v[0].second = 1; if (s[n-1] == '0') v.back().second = 1; sort(v.begin(), v.end(), [v](PII x, PII y) {return x.first + x.second * 2 > y.first + y.second * 2;}); int all; while(!v.empty()) { all = 0; for (int i = 0; i < v.size(); i++) { // vax first unvaxxed cluster if (v[i].second == 2 || v[i].first == 0) all++; else { if (v[i].first == 1) v[i].second = 2; else v[i].second += 1; break; } } if (all == v.size()) break; else { // spread the virus for (int i = v.size() - 1; i >= all; i--) { if (v[i].first == 0) { if (v.size() == i+1) v.pop_back(); continue; } else if ((v[i].second == 1) || (v[i].first == 1 && v[i].second == 0)){ v[i].first -= 1; sick++; } else if (v[i].second == 0) { v[i].first -= 2; sick += 2; } } } } cout << sick << '\n'; } }
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 | #include <bits/stdc++.h> using namespace std; #define pb push_back #define ll long long #define vi vector<int> #define vvi vector<vi> #define vll vector<ll> #define mp make_pair #define fi first #define se second #define PII pair<int,int> #define vPII vector<PII> int t, n; string s; // 00000000010000000000100000000000000000000000001000000000000000000000000000000000000000001 int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cin >> t; while (t--) { vPII v; int sick = 0; cin >> n >> s; s.append("1"); int buf = 0; for (char i : s) { if (i == '1') { if (buf > 0) { v.push_back(make_pair(buf, 0)); buf = 0; } sick++; } else buf += 1; } sick--; if (s[0] == '0') v[0].second = 1; if (s[n-1] == '0') v.back().second = 1; sort(v.begin(), v.end(), [v](PII x, PII y) {return x.first + x.second * 2 > y.first + y.second * 2;}); int all; while(!v.empty()) { all = 0; for (int i = 0; i < v.size(); i++) { // vax first unvaxxed cluster if (v[i].second == 2 || v[i].first == 0) all++; else { if (v[i].first == 1) v[i].second = 2; else v[i].second += 1; break; } } if (all == v.size()) break; else { // spread the virus for (int i = v.size() - 1; i >= all; i--) { if (v[i].first == 0) { if (v.size() == i+1) v.pop_back(); continue; } else if ((v[i].second == 1) || (v[i].first == 1 && v[i].second == 0)){ v[i].first -= 1; sick++; } else if (v[i].second == 0) { v[i].first -= 2; sick += 2; } } } } cout << sick << '\n'; } } |