Submission #492151

#	Time	Username	Problem	Language	Result	Execution time	Memory
492151		jeroenodb	Global Warming (CEOI18_glo)	C++14	10 / 100	101 ms	2364 KiB

glo

#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 1e5+1, oo = 1e9;
int main() {
    int n,x; cin >> n >> x;
    vi dp,dp2;
    while(n--) {
        int a; cin >> a;
        // dp2 can be made better with a normally
        auto it = lower_bound(all(dp2),a);
        if(it==dp2.end()) dp2.push_back(a);
        else *it=a;
        // now make dp2 better with special transition
        int j = lower_bound(all(dp),a+x)-dp.begin();
        if(j==dp2.size()) dp2.push_back(a);
        else dp2[j] = min(dp2[j],a);
        // normal transition for dp
        it = lower_bound(all(dp),a);
        if(it==dp.end()) dp.push_back(a);
        else *it=a;


    }
    cout << dp2.size() << '\n';
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:23:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if(j==dp2.size()) dp2.push_back(a);
      |            ~^~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25