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0264_Ugly_Number_II.cpp
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38 lines (38 loc) · 1.95 KB
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// ███████╗ █████╗ ███╗ ██╗ ██████╗ █████╗ ██████╗ ██████╗ ██╗ ██╗
// ██╔════╝ ██╔══██╗ ████╗ ██║ ██╔══██╗ ██╔══██╗ ██╔══██╗ ██╔══██╗ ██║ ██║
// ███████╗ ███████║ ██╔██╗ ██║ ██║ ██║ ███████║ ██████╔╝ ██████╔╝ ███████║
// ╚════██║ ██╔══██║ ██║╚██╗██║ ██║ ██║ ██╔══██║ ██╔═██╗ ██╔══██╗ ██╔══██║
// ███████║ ██║ ██║ ██║ ╚████║ ██████╔╝ ██║ ██║ ██║ ██╗ ██████╔╝ ██║ ██║
// ╚══════╝ ╚═╝ ╚═╝ ╚═╝ ╚═══╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝ ╚═╝ ╚═╝
#pragma GCC optimize("Ofast", "inline", "ffast-math", "unroll-loops","no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native", "f16c")
auto init = []() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
return 'c';
}();
class Solution {
public:
int nthUglyNumber(int n) {
vector<int> dp(n+1);
int a2=1,a3=1,a5=1;
dp[1]=1;
for(int i=2; i<=n; i++){
int aa2= dp[a2]*2;
int aa3= dp[a3]*3;
int aa5= dp[a5]*5;
dp[i] = min({aa2,aa3,aa5});
if(dp[i]==aa2){
a2++;
}
if(dp[i]==aa3){
a3++;
}
if(dp[i]==aa5){
a5++;
}
}
return dp[n];
}
};