Submission #341921

#TimeUsernameProblemLanguageResultExecution timeMemory
341921ignaciocantaArt Exhibition (JOI18_art)C++14
0 / 100
1 ms364 KiB
#include <iostream> #include <algorithm> #include <set> #include <map> #include <queue> #include <cmath> using namespace std; using tint = long long; using ld = long double; #define FOR(i,a,b) for (int i = (a); i < (b); ++i) #define F0R(i,a) FOR(i,0,a) #define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i) #define R0F(i,a) ROF(i,0,a) #define trav(a,x) for (auto& a: x) using pi = pair<tint,tint>; using pl = pair<tint,tint>; using vi = vector<int>; using vpi = vector<pi>; using vvi = vector<vi>; using vl = vector<tint>; using vb = vector<bool>; #define pb push_back #define pf push_front #define rsz resize #define all(x) begin(x), end(x) #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)(x).size() #define ins insert #define f first #define s second #define mp make_pair #define DBG(x) cerr << #x << " = " << x << endl; const int MOD = 1e9+7; const int mod = 998244353; const int MX = 1005; const tint INF = 1e18; const int inf = 2e9; const ld PI = acos(ld(-1)); const ld eps = 1e-8; const int dx[4] = {0, 0, -1, 1}; const int dy[4] = {1, -1, 0, 0}; template<class T> void remDup(vector<T> &v){ sort(all(v)); v.erase(unique(all(v)),end(v)); } bool valid(int x, int y, int n, int m){ return (0<=x && x<n && 0<=y && y<m); } int cdiv(int a, int b) { return a/b+((a^b)>0&&a%b); } //redondea p arriba int fdiv(int a, int b) { return a/b-((a^b)<0&&a%b); } //redonde p abajo void NACHO(string name = "lightson"){ ios_base::sync_with_stdio(0); cin.tie(0); //freopen((name+".in").c_str(), "r", stdin); //freopen((name+".out").c_str(), "w", stdout); } int main(){ NACHO(); // supongamos que mi minimo actual es min y mi maximo actual es max // obviamente, voy a querer meter a todos aquellos elementos con min <= a[i].f <= max // ya que no me afecta max-min y aumenta S. // es por esto que si los ordenamos por a[i].f siempre vamos a querer tomar rangos // consecutivos. Esto ultimo lo resolvemos con suma de prefijos int n; cin >> n; vpi a (n); F0R(i, n) cin >>a[i].f >> a[i].s; sort(all(a)); vl s (n+1, 0); FOR(i, 1, n+1) s[i] = s[i-1]+a[i-1].s; tint ret = 0; tint maxi = -INF; FOR(i, 1, n+1){ ret = max(ret, s[i]-a[i-1].f+maxi); maxi = max(maxi, a[i-1].f-s[i-1]); } cout << ret << "\n"; }
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