Submission #1045689

#	Time	Username	Problem	Language	Result	Execution time	Memory
1045689		gagik_2007	Toy (CEOI24_toy)	C++17	35 / 100	762 ms	765016 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define ff first
#define ss second

ll ttt;
const ll INF=1e18;
const ll MOD=1e9+7;
const ll N=93;
ll n,m,k;
int h, v;
bool dp[N][N][N][N];
bool vis[N][N][N][N];
bool d[N][N];
int pf[N][N];
int colpf[N][N];
int tgi,tgj;

int getPf(int i, int j1, int j2){
    if(j1==0)return pf[i][j2];
    return pf[i][j2]-pf[i][j1-1];
}

int getColPf(int j, int i1, int i2){
    if(i1==0)return colpf[j][i2];
    return colpf[j][i2]-colpf[j][i1-1];
}

void recurs(int i, int j, int lh, int lv){
    if(vis[i][j][lh][lv])return;
    vis[i][j][lh][lv]=true;
    if(!dp[i][j][lh][lv])return;
    // cout<<i<<" "<<j<<" "<<lh<<" "<<lv<<endl;

    int hi=i,hj=j-lh;
    int vi=i-lv,vj=j;

    // H movement
    //up
    if(i>0&&lv>0&&getPf(hi-1,hj,hj+h-1)==0){
        dp[i-1][j][lh][lv-1]=true;
        recurs(i-1,j,lh,lv-1);
    }
    //down
    if(i<n-1&&lv<v-1&&getPf(hi+1,hj,hj+h-1)==0){
        dp[i+1][j][lh][lv+1]=true;
        recurs(i+1,j,lh,lv+1);
    }
    //left
    if(hj>0&&lh<h-1&&!d[i][hj-1]){
        dp[i][j][lh+1][lv]=true;
        recurs(i,j,lh+1,lv);
    }
    //right
    if(hj+h<m&&lh>0&&!d[i][hj+h]){
        dp[i][j][lh-1][lv]=true;
        recurs(i,j,lh-1,lv);
    }

    // V movement
    //up
    if(vi>0&&lv<v-1&&!d[vi-1][j]){
        dp[i][j][lh][lv+1]=true;
        recurs(i,j,lh,lv+1);
    }
    //down
    // cout<<vi+v<<" < "<<n<<" && "<<lv<<" > 0 && !"<<d[vi+v][j]<<endl;
    if(vi+v<n&&lv>0&&!d[vi+v][j]){
        dp[i][j][lh][lv-1]=true;
        recurs(i,j,lh,lv-1);
    }
    //left
    if(j>0&&lh>0&&getColPf(j-1,vi,vi+v-1)==0){
        dp[i][j-1][lh-1][lv]=true;
        recurs(i,j-1,lh-1,lv);
    }
    //right
    if(j<m-1&&lh<h-1&&getColPf(j+1,vi,vi+v-1)==0){
        dp[i][j+1][lh+1][lv]=true;
        recurs(i,j+1,lh+1,lv);
    }
}

void calculatePfs(){
    for(int i=0;i<n;i++){
        pf[i][0]=d[i][0];
        for(int j=1;j<m;j++){
            pf[i][j]=pf[i][j-1]+d[i][j];
        }
    }
    for(int j=0;j<m;j++){
        colpf[j][0]=d[0][j];
        for(int i=1;i<n;i++){
            colpf[j][i]=colpf[j][i-1]+d[i][j];
        }
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    // freopen("Dinput.txt","r",stdin);
    // freopen("Doutput.txt","w",stdout);
    cin>>m>>n;
    cin>>h>>v;
    int i1,i2,j1,j2;
    cin>>j1>>i1>>j2>>i2;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            char c;
            cin>>c;
            // cout<<c;
            if(c=='X'){
                d[i][j]=true;
            }
            if(c=='*'){
                tgi=i;
                tgj=j;
                // cout<<i<<" "<<j<<endl;
            }
        }
        // cout<<endl;
    }
    calculatePfs();
    int ii=i1;
    int jj=j2;
    int lh=jj-j1;
    int lv=ii-i2;
    dp[ii][jj][lh][lv]=true;
    recurs(ii,jj,lh,lv);
    for(lh=0;lh<h;lh++){
        for(lv=0;lv<v;lv++){
            if(dp[tgi][tgj][lh][lv]){
                // cout<<tgi<<" "<<tgj<<endl;
                // cout<<lh<<" "<<lv<<endl;
                cout<<"YES"<<endl;
                return 0;
            }
        }
    }
    cout<<"NO"<<endl;
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void recurs(int, int, int, int)':
Main.cpp:42:17: warning: unused variable 'vj' [-Wunused-variable]
   42 |     int vi=i-lv,vj=j;
      |                 ^~

• Subtask 0: 0 / 0
• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 0 / 9
• Subtask 4: 0 / 29
• Subtask 5: 0 / 27