Submission #909579

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
909579	2024-01-17T09:27:44 Z	schzeey	Watching (JOI13_watching)	C++14	Compilation error	0 ms	0 KB

watching

#include <bits/stdc++.h>
using namespace std;
#define int ll  
int n, a, b;
vector <int> arr;
bool check(int ans){
    vector<vector<int>> dp(a+1, vector<int>(n+1, 0));
    for (int i = 0; i < a+1; ++i){
        for (int j = 1; j <= n; ++j){
            int pa = j, pb = j;
            do pa--; while(arr[j]-arr[pa] <= ans);
            do pb--; while(arr[j]-arr[pb] <= 2*ans);

            if (i == 0) dp[i][j] = dp[i][pb]+1;
            else dp[i][j] = min(dp[i][pb]+1, dp[i-1][pa]);
        }
    }
    return dp[a][n] <= b;
}

int main(){
    cin >> n >> a >> b;
    arr.resize(n+1);
    for (int i = 1; i <= n; ++i) cin >> arr[i];
    if (a+b >= n) return cout<<1, 0;
    arr[0] = -1e9;
    sort(arr.begin(), arr.end());
    //for (auto e: arr) cout << e << " ";
    int lf = 0, ri = 1e9;
    while (lf <= ri){

        int mid = (lf+ri)/2;
        //cout << mid << " ";
        if (check(mid)) ri = mid-1;
        else lf = mid+1;

    }
    cout << lf+1;

}

Compilation message

watching.cpp:3:13: error: 'll' does not name a type
    3 | #define int ll
      |             ^~
watching.cpp:4:1: note: in expansion of macro 'int'
    4 | int n, a, b;
      | ^~~
watching.cpp:3:13: error: 'll' was not declared in this scope
    3 | #define int ll
      |             ^~
watching.cpp:5:9: note: in expansion of macro 'int'
    5 | vector <int> arr;
      |         ^~~
watching.cpp:5:12: error: template argument 1 is invalid
    5 | vector <int> arr;
      |            ^
watching.cpp:5:12: error: template argument 2 is invalid
watching.cpp:3:13: error: 'll' was not declared in this scope
    3 | #define int ll
      |             ^~
watching.cpp:6:12: note: in expansion of macro 'int'
    6 | bool check(int ans){
      |            ^~~
watching.cpp:3:13: error: 'll' does not name a type
    3 | #define int ll
      |             ^~
watching.cpp:21:1: note: in expansion of macro 'int'
   21 | int main(){
      | ^~~