Submission #68929

#	Time	Username	Problem	Language	Result	Execution time	Memory
68929		yusufake	Paint By Numbers (IOI16_paint)	C++98	100 / 100	1837 ms	170944 KiB

paint

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

#include "paint.h"

#define ll long long
#define pb push_back
const int N = 2e5 + 2;
//const int S_MAX_LEN = 200 * 1000;
//char buf[S_MAX_LEN + 1];

int M[N][201],a[201],nex[N],t[N],zer[N],n,k;
string s,ans;
int f(int i, int j){
    //cout << i << " " << j << " " << h << " aa\n";
    if(i >= n) return j==k;
    int &r = M[i][j];
    if(r != -1) return r;
    r = 0;
    if(j < k && i+a[j] <= nex[i] && s[ i+a[j] ] != 'X') {
        r |= f(i+a[j]+1,j+1);
        //cout << i << " " << j << " " << r << "  zz\n";
        if(r){
            zer[ i+a[j] ] = 1;
            t[i]++; t[ i+a[j] ]--; }
    }
    if(s[i] != 'X'){
        int t = f(i+1,j);
        r |= t;
        if(t) zer[i]=1;
    }
    return r;
}

string solve_puzzle(string ss, vector <int> aa){
    int i;
    s = ss;
    n = s.size();
    s.pb('.');
    k = aa.size();
    for(i=0;i<k;i++) a[i] = aa[i];
    nex[n] = n;
    for(i=n-1; i>=0; i--){
        nex[i] = nex[i+1];
        if(s[i] == '_') nex[i] = i;
    }
    memset(M , -1 , sizeof M);
    f(0,0);
    int x = 0;
    ans.resize(n);
    for(i=0;i<n;i++){
        x += t[i];
        if(s[i] != '.'){
            ans[i] = s[i];
            continue;
        }
        if(zer[i] && x>0){
            ans[i] = '?';
        }
        else if(zer[i]) ans[i] = '_';
        else ans[i] = 'X';
    }
    return ans;
}

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