Submission #484432

#	Time	Username	Problem	Language	Result	Execution time	Memory
484432		XII	Global Warming (CEOI18_glo)	C++17	100 / 100	40 ms	3960 KiB

glo

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

#define fi first
#define se second
#define mp make_pair
#define eb emplace_back
#define ALL(x) (x).begin(), (x).end()

#define FOR(i, a, b) for(int i = (a); i < (b); ++i)
#define FORU(i, a, b) for(int i = (a); i <= (b); ++i)
#define FORD(i, a, b) for(int i = (a); i >= (b); --i)

#define IOS cin.tie(0)->sync_with_stdio(false);
#define PROB "CEOI18_glo"
void Fi(){
    if(fopen(PROB".inp", "r")){
        freopen(PROB".inp", "r", stdin);
        freopen(PROB".out", "w", stdout);
    }
}

const int N = 2e5 + 1;
int n, x, a[N];

int main(){
    IOS;
    Fi();
    cin >> n >> x;
    vector<int> d0, d1;
    FORU(i, 1, n){
        cin >> a[i];
        {
            int j = lower_bound(ALL(d1), a[i]) - d1.begin();
            if(j == d1.size()) d1.eb(a[i]);
            else d1[j] = min(d1[j], a[i]);
        }
        {
            int j = lower_bound(ALL(d0), a[i]) - d0.begin();
            if(j == d0.size()) d0.eb(a[i]);
            else d0[j] = a[i];
            if(j == d1.size()) d1.eb(a[i] - x);
            else d1[j] = min(d1[j], a[i] - x);
//            for(int x: d1) cout << x << " ";
//            cout << "d1\n";
//            for(int x: d0) cout << x << " ";
//            cout << "\n";
        }
    }
    cout << d1.size();
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |             if(j == d1.size()) d1.eb(a[i]);
      |                ~~^~~~~~~~~~~~
glo.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |             if(j == d0.size()) d0.eb(a[i]);
      |                ~~^~~~~~~~~~~~
glo.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |             if(j == d1.size()) d1.eb(a[i] - x);
      |                ~~^~~~~~~~~~~~
glo.cpp: In function 'void Fi()':
glo.cpp:20:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         freopen(PROB".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen(PROB".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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