Submission #1022765

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
10227652024-07-14 04:54:17nmtsLinear Garden (IOI08_linear_garden)C++17
95 / 100
169 ms65536 KiB
#include <bits/stdc++.h>
#define file(name) freopen(name".inp" , " r " , stdin);freopen(name".out" , " w " , stdout)
#define faster ios_base :: sync_with_stdio(false) ; cin.tie(0) ; cout.tie(0) ;
#define dp(i , mi , ma) dp[i][mi + 2][ma]
using namespace std;
int n , m;
string s;
int dp[1000000][3][3];
void solve()
{
cin >> n >> m >> s;
for (int mi = -2; mi <= 0; ++mi)
for (int ma = 0; ma <= 2; ++ma)
dp(n + 1, mi, ma) = 1;
for (int i = n; i >= 1; --i) {
for (int mi = -2; mi <= 0; ++mi) {
for (int ma = 0; ma <= 2; ++ma) {
if (mi > -2) dp(i, mi, ma) += dp(i + 1, mi - 1, max(0, ma - 1));
if (ma < 2) dp(i, mi, ma) += dp(i + 1, min(0, mi + 1), ma + 1);
dp(i, mi, ma) %= m;
 
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