제출 #1311165

#제출 시각아이디문제언어결과실행 시간메모리
1311165aryanLightning Rod (NOI18_lightningrod)C++20
14 / 100
974 ms78196 KiB
#include<bits/stdc++.h> using namespace std; using i64 = long long; int main(){ ios_base::sync_with_stdio(false); cin.tie(NULL); int n; cin >> n; vector<pair<int,int>> a(n); for(int i = 0;i < n;i++){ int x,y; cin >> x >> y; a[i].first = x; a[i].second = y; } int ans = n; for(int i = 0;i < n;i++){ if(a[i].second == 1) continue; bool ok = false; if(i > 0 && a[i - 1].second == 1) ok = true; if(i + 1 < n && a[i + 1].second == 1) ok = true; if(ok) ans --; } cout << ans << '\n'; return 0; }
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