Submission #924068

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
924068	2024-02-08 11:05:09	thinknoexit	Linear Garden (IOI08_linear_garden)	C++17	100 / 100	18 ms	9052 KiB

linear_garden

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 1000001;
/*
    L +
    P -
    [0, 2]
    [-1, 1]
    [-2, 0]
*/
int pw[N], n, MOD;
int v[N];
int solve() {
    int ans = 0;
    int c = 0;
    for (int i = n;i >= 1;i--) {
        int idx = n - i + 1;
        int now = v[idx];
        if (now == 0) {
            c++;
        }
        else {
            if (c == 1) {
                ans = (ans + pw[(i - 1) / 2]) % MOD;
            }
            c--;
        }
    }
 
 
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