Created
December 24, 2018 02:53
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class Solution { | |
public: | |
int uniquePaths(int m, int n) { | |
if (m > n) return uniquePaths(n, m); | |
vector<int> pre(m, 1); | |
vector<int> cur(m, 1); | |
for (int j = 1; j < n; j++) { | |
for (int i = 1; i < m; i++) | |
cur[i] = cur[i - 1] + pre[i]; | |
swap(pre, cur); | |
} | |
return pre[m - 1]; | |
} | |
}; |
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