Submission #819397

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
819397	2023-08-10 10:17:18	AdamGS	Cake 3 (JOI19_cake3)	C++17	100 / 100	2971 ms	22952 KiB

cake3

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#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const ll INF=1e18+7;
const int LIM=2e5+7;
pair<ll,ll>T[LIM], dp[LIM];
multiset<ll>S;
vector<pair<ll,ll>>rollback;
ll akt, n, m;
void upd(int x) {
  S.insert(T[x].nd);
  akt+=T[x].nd;
  if(S.size()>m-2) {
    rollback.pb({T[x].nd, *S.begin()});
    akt-=*S.begin();
    S.erase(S.begin());
  } else rollback.pb({T[x].nd, -1});
}
void undo() {
  if(rollback.back().nd!=-1) {
    akt+=rollback.back().nd;
    S.insert(rollback.back().nd);
  }
  akt-=rollback.back().st;
  S.erase(S.find(rollback.back().st));
 
 
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Compilation message (stderr)

cake3.cpp: In function 'void upd(int)':
cake3.cpp:18:13: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   18 |  if(S.size()>m-2) {
      |     ~~~~~~~~^~~~
cake3.cpp: In function 'void solve(int, int, int, int)':
cake3.cpp:38:14: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   38 |   if(S.size()==m-2) dp[mid]=max(dp[mid], {akt+T[i].nd+T[mid].nd-2*T[i].st+2*T[mid].st, i});
      |      ~~~~~~~~^~~~~

• Subtask 1: 5 / 5
• Subtask 2: 19 / 19
• Subtask 3: 76 / 76