Submission #838723

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
838723	2023-08-27 16:08:54	erekle	Radio Towers (IOI22_towers)	C++17	23 / 100	4014 ms	13784 KiB

towers

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#include "towers.h"
#include <vector>
#include <algorithm>
using namespace std;
int n;
vector<int> H;
const int MX_N = 1e5, LG = 17;
int rmq[1+LG][MX_N];
int p2[MX_N];
int rangeMin(int l, int r) {
    int p = p2[r-l+1];
    return min(rmq[p][l], rmq[p][r-(1<<p)+1]);
}
void init(int N, vector<int> Hs) {
    for (int i = 2; i <= N; ++i) p2[i] = p2[i-1] + !(i & (i-1));
    n = N, H = Hs;
    // rmq
    for (int i = 0; i < n; ++i) rmq[0][i] = H[i];
    for (int i = 1, p = 1; i <= LG; ++i, p <<= 1) {
        for (int j = 0; j < n; ++j) {
            if (j+p >= n) rmq[i][j] = rmq[i-1][j];
            else rmq[i][j] = min(rmq[i-1][j], rmq[i-1][j+p]);
        }
    }
}
 
 
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• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 17
• Subtask 6: 0 / 19
• Subtask 7: 0 / 23