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296.cpp
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296.cpp
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__________________________________________________________________________________________________
class Solution {
public:
int minTotalDistance(vector<vector<int>>& grid) {
vector<int> rows, cols;
for (int i = 0; i < grid.size(); ++i) {
for (int j = 0; j < grid[i].size(); ++j) {
if (grid[i][j] == 1) {
rows.push_back(i);
cols.push_back(j);
}
}
}
return minTotalDistance(rows) + minTotalDistance(cols);
}
int minTotalDistance(vector<int> v) {
int res = 0;
sort(v.begin(), v.end());
int i = 0, j = v.size() - 1;
while (i < j) res += v[j--] - v[i++];
return res;
}
};
__________________________________________________________________________________________________
class Solution {
public:
int minTotalDistance(vector<vector<int>>& grid) {
vector<int> rows, cols;
for (int i = 0; i < grid.size(); ++i) {
for (int j = 0; j < grid[i].size(); ++j) {
if (grid[i][j] == 1) {
rows.push_back(i);
cols.push_back(j);
}
}
}
sort(cols.begin(), cols.end());
int res = 0, i = 0, j = rows.size() - 1;
while (i < j) res += rows[j] - rows[i] + cols[j--] - cols[i++];
return res;
}
};
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