제출 #619648

#제출 시각UTC-0아이디문제언어결과실행 시간메모리
6196482022-08-02 14:06:41Bench0310Paint By Numbers (IOI16_paint)C++17
90 / 100
568 ms524288 KiB
#include <bits/stdc++.h>
#include "paint.h"
using namespace std;
typedef long long ll;
string solve_puzzle(string s,vector<int> c)
{
int n=s.size();
int k=c.size();
c.insert(c.begin(),0);
s="$"+s;
vector<int> wsum(n+1,0);
for(int i=1;i<=n;i++) wsum[i]=wsum[i-1]+(s[i]=='_');
auto ws=[&](int l,int r)->int{return (wsum[r]-wsum[l-1]);};
vector one(n+1,vector(k+1,vector(2,bool(0))));
one[0][0][1]=1;
for(int i=1;i<=n;i++)
{
//extend
for(int j=0;j<=k;j++) one[i][j][1]=((one[i-1][j][0]||one[i-1][j][1])&&(s[i]!='X'));
//new block
for(int j=1;j<=k;j++) if(i-c[j]>=0) one[i][j][0]=(one[i-c[j]][j-1][1]&&ws(i-c[j]+1,i)==0);
}
vector two(n+2,vector(k+2,vector(2,bool(0))));
two[n+1][k+1][1]=1;
for(int i=n;i>=1;i--)
{
//extend
for(int j=1;j<=k+1;j++) two[i][j][1]=((two[i+1][j][0]||two[i+1][j][1])&&(s[i]!='X'));
 
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