Created
February 5, 2020 12:42
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Leetcode 97: Interleaving String (iterative dp)
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#include <iostream> | |
#include <string> | |
#include <vector> | |
using namespace std; | |
bool isInterleave(string s1, string s2, string s3) { | |
if (s1.size() + s2.size() != s3.size()) return false; | |
vector<vector<bool>> dp(s1.size()+1, vector<bool>(s2.size()+1, false)); | |
if (s3.size() == 0) return true; | |
dp[0][0] = true; | |
for (int c=1; c<=s2.size(); ++c) { | |
if (dp[0][c-1] && s2[c-1]==s3[c-1]) dp[0][c] = true; | |
} | |
for (int r=1; r<=s1.size(); ++r) { | |
if (dp[r-1][0] && s1[r-1]==s3[r-1]) dp[r][0] = true; | |
} | |
for (int r=1; r<=s1.size(); ++r) { | |
for (int c=1; c<=s2.size(); ++c) { | |
if (dp[r][c-1] && s2[c-1]==s3[r+c-1]) dp[r][c]=true; | |
if (dp[r-1][c] && s1[r-1]==s3[r+c-1]) dp[r][c]=true; | |
} | |
} | |
return dp[s1.size()][s2.size()]; | |
} | |
int main() { | |
string s1 = "aabaac"; | |
string s2 = "aadaaeaaf"; | |
string s3 = "aadaaeaabaafaac"; | |
// string s1 = "aabcc"; | |
// string s2 = "dbbca"; | |
// string s3 = "aadbbbaccc"; //"aadbbcbcac"; | |
cout << isInterleave(s1, s2, s3) << "\n"; | |
return 0; | |
} |
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