leetcode ZigZag Conversion
2014-03-27 11:01
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The string
And then read line by line:
Write the code that will take a string and make this conversion given a number of rows:
"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)
P A H N A P L S I I G Y I R
And then read line by line:
"PAHNAPLSIIGYIR"
Write the code that will take a string and make this conversion given a number of rows:
string convert(string text, int nRows);
convert("PAYPALISHIRING", 3)should return
"PAHNAPLSIIGYIR".
#include <iostream> #include <string> #include <algorithm> using namespace std; string convert(string s, int nRows){ if(nRows == 1) return s; string res = ""; int distance = 2*nRows-2,length = s.length(); for(int i = 0; i < nRows; ++ i){ for(int j = 0 ; distance*j+i < length; ++ j ){ res+=s[distance*j+i]; int next = distance*j + i + distance-2*i; if( (i!=0) && (i!=nRows-1) && next < length) res +=s[next]; } } return res; } int main(){ cout<<convert("PAYPALISHIRING", 3)<<endl; }
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