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snailSort.cpp
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59 lines (44 loc) · 1.47 KB
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#include <string>
#include <vector>
#include<iostream>
void rightSlice(std::vector<std::vector<int>>&snail,std::vector<int> &result){
for(int i = 0; i < snail[0].size(); i++){
result.push_back(snail[0][i]);
}
snail.erase(snail.begin(),snail.begin()+1);
}
void leftSlice(std::vector<std::vector<int>>&snail,std::vector<int> &result){
for(int i = snail[snail.size()-1].size()-1; i >= 0; i--){
result.push_back(snail[snail.size()-1][i]);
}
snail.erase(snail.end()-1);
}
void downSlice(std::vector<std::vector<int>>&snail,std::vector<int> &result){
for (int i = 0; i < snail.size(); i++){
result.push_back(snail[i][snail[i].size()-1]);
}
for (int i = 0; i < snail.size(); i++)
snail[i].erase(snail[i].end()-1);
}
void upSlice(std::vector<std::vector<int>>&snail,std::vector<int> &result){
for (int i = snail.size() - 1;i >= 0 ; i--){
result.push_back(snail[i][0]);
}
for (int i = 0; i < snail.size(); i++) {
snail[i].erase(snail[i].begin());
}
}
std::vector<int> snail(const std::vector<std::vector<int>> &snail_map) {
std::vector<std::vector<int>> snail = snail_map;
std::vector<int> result;
while(!snail.empty()) {
rightSlice(snail,result);
if(snail.empty()) { break; }
downSlice(snail,result);
if(snail.empty()) { break; }
leftSlice(snail,result);
if(snail.empty()) { break; }
upSlice(snail,result);
}
return result;
}