Submission #785453

#	Time	Username	Problem	Language	Result	Execution time	Memory
785453		makanhulia	Global Warming (CEOI18_glo)	C++17	Compilation error	0 ms	0 KiB

glo

#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main() {
  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  int n, x; cin >> n >> x;
  
  if(x==0) {
    vector<int> a(n); for(int &p : a) cin >> p;
  vector<int> dp; int ans=1;
    for(int p : a) {
      auto it=lower_bound(dp.begin(), dp.end(), p);
      if(it==dp.end()) dp.push_back(p);
      else *it=p;
    }
    ans=dp.size();
  } else if(x<=5 && n<=50000) {
    vector<int> a, b;
    while(n--) {
    int p; cin >> p;
    vector<int> tempaa=a;
    auto it=lower_bound(tempaa.begin(), tempaa.end(), p);
    if(it==tempaa.end()) tempaa.push_back(p);
    else *it=p;
    vector<int> tempba=b;
    it=lower_bound(tempba.begin(), tempba.end(), p);
    if(it==tempba.end()) tempba.push_back(p);
    else *it=p;
    if(tempaa.size()>tempba.size()) a=tempaa;
    else a=tempba; p-=x;
    it=lower_bound(b.begin(), b.end(), p); 
    if(it==b.end()) b.push_back(p);
    else *it=p;
  }
  int ans=max((int)a.size(), (int)b.size());
  }
  else {
    vector<int> a(n); for(int &p : a) cin >> p;
  vector<int> dp; int ans=1;
    for(int i=0; i<n; i++) {
        dp.clear();
        vector<int> temp=a;
        for(int k=i; k<n; k++) temp[k]+=x;
        for(int p : temp) {
          auto it=lower_bound(dp.begin(), dp.end(), p);
          if(it==dp.end()) dp.push_back(p);
          else *it=p;    
          }
        ans=max(ans, (int)dp.size());
    }
  }
    cout << ans << '\n';   
    return 0;
}   

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:10:23: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
   10 |   vector<int> dp; int ans=1;
      |                       ^~~
glo.cpp:30:5: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   30 |     else a=tempba; p-=x;
      |     ^~~~
glo.cpp:30:20: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   30 |     else a=tempba; p-=x;
      |                    ^
glo.cpp:35:7: warning: unused variable 'ans' [-Wunused-variable]
   35 |   int ans=max((int)a.size(), (int)b.size());
      |       ^~~
glo.cpp:52:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   52 |     cout << ans << '\n';
      |             ^~~
      |             abs