이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
//Self-control leads to consistency.
#include <bits/stdc++.h>
using namespace std;
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#define flash ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define debug(x) cerr << " - " << #x << ": " << x << endl;
#define debugs(x, y) cerr << " - " << #x << ": " << x << " " << #y << ": " << y << endl;
#define all(x) (x).begin(),(x).end()
#define sz(x) (ll)x.size()
#define ll long long
#define INF 1000000000
#define MOD 1000000007
#define pb push_back
#define ve vector<ll>
#define dos pair<ll,ll>
#define vedos vector<dos>
#define rand mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
#define EPS 0.000001
struct greateri
{
template<class T>
bool operator()(T const &a, T const &b) const { return a > b; }
};
void setIO(string s) {
ios_base::sync_with_stdio(0); cin.tie(0);
freopen((s+".in").c_str(),"r",stdin);
freopen((s+".out").c_str(),"w",stdout);
}
ll n,m;
map<pair<dos,dos>,ll>dp,ans1;
ve hed;
ll ans=0;
int main()
{
//flash;
cin>>n;
cin>>m;
string in;
cin>>in;
ll dif=0;
ll low=0;
ll high=0;
ll rank=0;
for (ll i = 0; i < sz(in); ++i)
{
if(in[i]=='P' && abs(dif-high+1)<=2 && abs(dif-low+1)<=2 && abs(dif+1)<=2){
//rank=(rank+dp[{{i,max(high,dif+1)},{min(low,dif+1),dif+1}}])%m;
ans1[{{i,max(high,dif+1)},{min(low,dif+1),dif+1}}]=1;
}
if(in[i]=='L'){
dif++;
high=max(high,dif);
low=min(low,dif);
}
else {
dif--;
low=min(low,dif);
high=max(high,dif);
}
}
for (ll index = n-1; index >= 0; index--)
{
for (ll high = -2; high <= 2; ++high)
{
for (ll low = -2; low <= 2; ++low)
{
for (ll cur = -2; cur <= 2; ++cur)
{
ll ans=0;
if(index==n-1){dp[{{index,high},{low,cur}}]=1;continue;}
if(abs(cur-high+1)<=2 && abs(cur-low+1)<=2 && abs(cur+1)<=2){
ll sol=cur+1;
ans=(ans+dp[{{index+1,max(high,sol)},{min(low,sol),sol}}])%m;
}
if(abs(cur-high-1)<=2 && abs(cur-low-1)<=2 && abs(cur-1)<=2){
ll sol=cur-1;
ans=(ans+dp[{{index+1,max(high,sol)},{min(low,sol),sol}}])%m;
}
dp[{{index,high},{low,cur}}]=ans;
if(ans1.find({{index,high},{low,cur}})!=ans1.end()){
ans1[{{index,high},{low,cur}}]=ans;
}
}
}
}
auto k=dp;
for(auto it:dp){
if(it.first.first.first==index+1)k.erase(it.first);
}
dp=k;
}
dif=0;
low=0;
high=0;
rank=0;
for (ll i = 0; i < sz(in); ++i)
{
if(in[i]=='P' && abs(dif-high+1)<=2 && abs(dif-low+1)<=2 && abs(dif+1)<=2){
rank=(rank+ans1[{{i,max(high,dif+1)},{min(low,dif+1),dif+1}}])%m;
//ans[{{i,max(high,dif+1)},{min(low,dif+1),dif+1}}]=1;
}
if(in[i]=='L'){
dif++;
high=max(high,dif);
low=min(low,dif);
}
else {
dif--;
low=min(low,dif);
high=max(high,dif);
}
}
cout<<(rank+1)%m;
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
linear_garden.cpp:5: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
5 | #pragma GCC optimization ("O3")
|
linear_garden.cpp:6: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
6 | #pragma GCC optimization ("unroll-loops")
|
linear_garden.cpp: In function 'void setIO(std::string)':
linear_garden.cpp:28:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
28 | freopen((s+".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
linear_garden.cpp:29:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
29 | freopen((s+".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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