oj.uz

Submission #213431

# Submission time Handle Problem Language Result Execution time Memory
213431 2020-03-25T18:57:54 Z rqi Art Exhibition (JOI18_art) C++14
100 / 100
 237 ms 8680 KB 
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef double db; 
typedef string str; 

typedef pair<int,int> pi;
typedef pair<ll,ll> pl; 
typedef pair<db,db> pd; 

typedef vector<int> vi; 
typedef vector<ll> vl; 
typedef vector<db> vd; 
typedef vector<str> vs; 
typedef vector<pi> vpi;
typedef vector<pl> vpl; 
typedef vector<pd> vpd; 

#define mp make_pair 
#define f first
#define s second
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend() 
#define rsz resize
#define ins insert 
#define ft front() 
#define bk back()
#define pf push_front 
#define pb push_back
#define eb emplace_back 
#define lb lower_bound 
#define ub upper_bound 

#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)

const int MOD = 1e9+7; // 998244353;
const int MX = 2e5+5; 
const ll INF = 1e18; 
const ld PI = acos((ld)-1);
const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1}; 

template<class T> bool ckmin(T& a, const T& b) { 
  return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { 
  return a < b ? a = b, 1 : 0; } 
int pct(int x) { return __builtin_popcount(x); } 
int bit(int x) { return 31-__builtin_clz(x); } // floor(log2(x)) 
int cdiv(int a, int b) { return a/b+!(a<0||a%b == 0); } // division of a by b rounded up, assumes b > 0 

// INPUT
template<class A> void re(complex<A>& c);
template<class A, class B> void re(pair<A,B>& p);
template<class A> void re(vector<A>& v);
template<class A, size_t SZ> void re(array<A,SZ>& a);

template<class T> void re(T& x) { cin >> x; }
void re(db& d) { str t; re(t); d = stod(t); }
void re(ld& d) { str t; re(t); d = stold(t); }
template<class H, class... T> void re(H& h, T&... t) { re(h); re(t...); }

template<class A> void re(complex<A>& c) { A a,b; re(a,b); c = {a,b}; }
template<class A, class B> void re(pair<A,B>& p) { re(p.f,p.s); }
template<class A> void re(vector<A>& x) { trav(a,x) re(a); }
template<class A, size_t SZ> void re(array<A,SZ>& x) { trav(a,x) re(a); }

// TO_STRING
#define ts to_string
template<class A, class B> str ts(pair<A,B> p);
template<class A> str ts(complex<A> c) { return ts(mp(c.real(),c.imag())); }
str ts(bool b) { return b ? "true" : "false"; }
str ts(char c) { str s = ""; s += c; return s; }
str ts(str s) { return s; }
str ts(const char* s) { return (str)s; }
str ts(vector<bool> v) { 
  bool fst = 1; str res = "{";
  F0R(i,sz(v)) {
    if (!fst) res += ", ";
    fst = 0; res += ts(v[i]);
  }
  res += "}"; return res;
}
template<size_t SZ> str ts(bitset<SZ> b) {
  str res = ""; F0R(i,SZ) res += char('0'+b[i]);
  return res; }
template<class T> str ts(T v) {
  bool fst = 1; str res = "{";
  for (const auto& x: v) {
    if (!fst) res += ", ";
    fst = 0; res += ts(x);
  }
  res += "}"; return res;
}
template<class A, class B> str ts(pair<A,B> p) {
  return "("+ts(p.f)+", "+ts(p.s)+")"; }

// OUTPUT
template<class A> void pr(A x) { cout << ts(x); }
template<class H, class... T> void pr(const H& h, const T&... t) { 
  pr(h); pr(t...); }
void ps() { pr("\n"); } // print w/ spaces
template<class H, class... T> void ps(const H& h, const T&... t) { 
  pr(h); if (sizeof...(t)) pr(" "); ps(t...); }

// DEBUG
void DBG() { cerr << "]" << endl; }
template<class H, class... T> void DBG(H h, T... t) {
  cerr << to_string(h); if (sizeof...(t)) cerr << ", ";
  DBG(t...); }
#ifdef LOCAL // compile with -DLOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 42
#endif

// FILE I/O
void setIn(string s) { freopen(s.c_str(),"r",stdin); }
void setOut(string s) { freopen(s.c_str(),"w",stdout); }
void unsyncIO() { ios_base::sync_with_stdio(0); cin.tie(0); }
void setIO(string s = "") {
  unsyncIO();
  // cin.exceptions(cin.failbit); 
  // throws exception when do smth illegal
  // ex. try to read letter into int
  if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
}

mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); 



int main() {
  setIO();
  int N;
  cin >> N;
  vector<pair<ll, ll>> C;
  C.pb(mp(0, 0));
  for(int i = 1; i <= N; i++){
    ll A, B;
    cin >> A >> B;
    C.pb(mp(A, B));
  }
  sort(all(C));
  for(int i = 1; i <= N; i++){
    C[i].s += C[i-1].s;
  }
  ll curmax = -INF;
  ll ans = 0;
  for(int i = N; i >= 1; i--){
    curmax = max(curmax, C[i].s-C[i].f);
    ans = max(ans, -C[i-1].s+C[i].f+curmax);
  }
  ps(ans);
  // you should actually read the stuff at the bottom
}

/* stuff you should look for
  * int overflow, array bounds
  * special cases (n=1?)
  * do smth instead of nothing and stay organized
  * WRITE STUFF DOWN
*/

Compilation message

art.cpp: In function 'void setIn(std::__cxx11::string)':
art.cpp:123:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 void setIn(string s) { freopen(s.c_str(),"r",stdin); }
                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
art.cpp: In function 'void setOut(std::__cxx11::string)':
art.cpp:124:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 void setOut(string s) { freopen(s.c_str(),"w",stdout); }
                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 256 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 256 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 8 ms 512 KB Output is correct
28 Correct 7 ms 640 KB Output is correct
29 Correct 7 ms 640 KB Output is correct
30 Correct 7 ms 640 KB Output is correct
31 Correct 7 ms 640 KB Output is correct
32 Correct 7 ms 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 KB Output is correct
35 Correct 7 ms 640 KB Output is correct
36 Correct 7 ms 640 KB Output is correct
37 Correct 7 ms 556 KB Output is correct
38 Correct 7 ms 640 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 7 ms 768 KB Output is correct
42 Correct 7 ms 556 KB Output is correct
43 Correct 7 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 7 ms 640 KB Output is correct
46 Correct 7 ms 640 KB Output is correct
47 Correct 7 ms 512 KB Output is correct
48 Correct 7 ms 640 KB Output is correct
49 Correct 7 ms 556 KB Output is correct
50 Correct 7 ms 640 KB Output is correct
51 Correct 7 ms 640 KB Output is correct

Subtask #4
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 256 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 8 ms 512 KB Output is correct
28 Correct 7 ms 640 KB Output is correct
29 Correct 7 ms 640 KB Output is correct
30 Correct 7 ms 640 KB Output is correct
31 Correct 7 ms 640 KB Output is correct
32 Correct 7 ms 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 KB Output is correct
35 Correct 7 ms 640 KB Output is correct
36 Correct 7 ms 640 KB Output is correct
37 Correct 7 ms 556 KB Output is correct
38 Correct 7 ms 640 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 7 ms 768 KB Output is correct
42 Correct 7 ms 556 KB Output is correct
43 Correct 7 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 7 ms 640 KB Output is correct
46 Correct 7 ms 640 KB Output is correct
47 Correct 7 ms 512 KB Output is correct
48 Correct 7 ms 640 KB Output is correct
49 Correct 7 ms 556 KB Output is correct
50 Correct 7 ms 640 KB Output is correct
51 Correct 7 ms 640 KB Output is correct
52 Correct 237 ms 8672 KB Output is correct
53 Correct 235 ms 8672 KB Output is correct
54 Correct 232 ms 8680 KB Output is correct
55 Correct 226 ms 8672 KB Output is correct
56 Correct 236 ms 8672 KB Output is correct
57 Correct 228 ms 8672 KB Output is correct
58 Correct 232 ms 8672 KB Output is correct
59 Correct 232 ms 8676 KB Output is correct
60 Correct 233 ms 8676 KB Output is correct
61 Correct 226 ms 8672 KB Output is correct
62 Correct 231 ms 8672 KB Output is correct
63 Correct 229 ms 8672 KB Output is correct
64 Correct 232 ms 8672 KB Output is correct
65 Correct 229 ms 8672 KB Output is correct
66 Correct 231 ms 8672 KB Output is correct
67 Correct 228 ms 8672 KB Output is correct
68 Correct 237 ms 8672 KB Output is correct