Submission #291191

#	Time	Username	Problem	Language	Result	Execution time	Memory
291191		REALITYNB	Paint By Numbers (IOI16_paint)	C++14	0 / 100	1 ms	384 KiB

paint

#include <bits/stdc++.h> 
using namespace std;
vector<int> b , w ;  
vector<int> c; 
string a ; 
vector<int> p ; 
int n , k ; 
bool theresno(int i , int j){
    int minus = 0;  
    if(i) minus=p[i-1 ] ; 
    return (p[j]-minus)==0 ; 
}
bool dp(int i , int j , int color){
    if(i==n) return 1 ; 
    if(i>n) return 0 ;
    if(color&&a[i]=='X') return 0 ;
    if(color==0&&a[i]=='_') return 0  ;
    //if(i==3&&color) cout << 1 << " " ; 
    bool ok = 0;//dp(i+1,j) ; 
    if(j==k){
        ok=dp(i+1,j,1) ; 
        if(ok)w[i] =1 ; 
    }
    else{
        if(color){
            ok = dp(i+1,j,0)|dp(i+1,j,1) ; 
            if(ok) w[i]=1 ; 
        }
        else{
            ok = dp(i+c[j],j+1,1)&theresno(i,i+c[j]-1) ;
            if(ok) b[i]=1,b[i+c[j]]=-1  ; 
        }
    }
    //mem[i][j][color]
    return ok ; 
}
string solve_puzzle(string b , vector<int> cc){
    //int n , k ; 
    a = b ; 
    c = cc ; 
    n = a.size() ; 
    k = c.size() ; 
    c.resize(k) ; 
    b.resize(n); 
    w.resize(n) ;
    p.resize(n) ; 
    for(int i=0;i<n;i++){
        if(i) p[i]+=p[i-1] ; 
        p[i]+=(a[i]=='_'); 
    }
    dp(0,0,0) ; 
    dp(0,0,1) ;    
    vector<char> ans(n,'_') ;
    for(int i=0;i<n;i++){
        if(i) b[i]+=b[i-1] ; 
        if(b[i]&&w[i]) ans[i]='?' ; 
        else if(b[i]) ans[i]='X' ; 
    }
    string rans ; 
    for(char x : ans)rans+=x ; 
    return rans ; 

}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 3
• Subtask 3: 0 / 22
• Subtask 4: 0 / 27
• Subtask 5: 0 / 21
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10