Submission #1247988

#TimeUsernameProblemLanguageResultExecution timeMemory
1247988al95ireyizBouquet (EGOI24_bouquet)C++20
0 / 100
3097 ms3996 KiB
//*** Bismillah ***// #pragma GCC optimize("O3", "fast-math", "unroll-loops", "no-stack-protector") #include <bits/stdc++.h> using namespace std; #if !defined(ONLINE_JUDGE) and !defined(EVAL) #include "template/debug.h" #else #define d(x...) #endif #define fr first #define er erase #define sc second #define in insert #define ll long long #define pb push_back #define vll vector<ll> #define pll pair<ll,ll> #define ull unsigned ll #define vpll vector<pll> #define len(x) (ll) x.size() #define all(x) x.begin(),x.end() const ll INF = 1e9; const ll INFL = 1e18; const ll MOD = 1e9+7; // const ll MOD = 998244353; const ll maxn = 2e5+5; ll n,m,k=0; ll l[maxn], r[maxn], dp[maxn]; void _(ll &tt){ cin >> n; ll mx = 0; for(ll i = 1; i <= n; i ++) cin >> l[i] >> r[i], l[i] = min(l[i], i - 1), r[i] = min(r[i], n - i); for(ll i = 1; i <= n; i ++){ dp[i] = dp[i - 1]; for(ll j = i - 1; j >= 1; j --){ if(max(l[i], r[j]) <= i - j - 1){ dp[i] = max(dp[i], dp[j] + 1); // break; } } } cout << dp[n] << '\n'; } signed main() { ll tm = clock(); cin.tie(0)->sync_with_stdio(0); ll t = 1; // cin >> t; for(ll tt = 1; tt <= t; tt ++) { _(tt); } cerr << "\n\033[1;31mTime: \033[1;30m" \ << (double)(clock()-tm)/1000000 << "\033[1;32m seconds\n"; }
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