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  1. // iostream is too mainstream
  2. #include <cstdio>
  3. // bitch please
  4. #include <iostream>
  5. #include <vector>
  6. #include <set>
  7. #include <map>
  8. #include <string>
  9. #include <queue>
  10. #include <stack>
  11. #include <algorithm>
  12. #include <iomanip>
  13. #define dibs reserve
  14. #define OVER9000 1234567890
  15. #define patkan 9
  16. #define tisic 47
  17. #define soclose 10e-7
  18. #define ALL_THE(CAKE,LIE) for(auto LIE =CAKE.begin(); LIE != CAKE.end(); LIE++)
  19. #define chocolate win
  20. #define ff first
  21. #define ss second
  22. #define abs(x) ((x < 0)?-(x):(x))
  23. // mylittlepony
  24. using namespace std;
  25.  
  26. int main() {
  27. 	// freopen("army.in","r",stdin);
  28. 	int T;
  29. 	scanf(" %d",&T);
  30.     for(int t =0; t < T; t++) {
  31.     	long long N;
  32.     	scanf(" %lld",&N);
  33.  
  34.     	long long a =0, b =2000000;
  35.     	while(b-a > 1) {
  36.     		long long c =(a+b)/2;
  37.     		long long s =c*(c+1)*(2*c+1)/6;
  38.     		if(s >= N) b =c;
  39.     		else a =c;}
  40.  
  41.     	long long ans =a*a;
  42.     	N -=a*(a+1)*(2*a+1)/6;
  43.     	if(N <= b*(b+1)/2) {
  44.     		a =-1;
  45.     		while(b-a > 1) {
  46.     			long long c =(b+a)/2;
  47.     			if(c*(c+1)/2 >= N) b =c;
  48.     			else a =c;}
  49.     		ans +=b;}
  50.     	else {
  51.     		ans +=2*b-1;
  52.     		N =b*b-N;
  53.     		a =0;
  54.     		while(b-a > 1) {
  55.     			long long c =(b+a)/2;
  56.     			if(c*(c+1)/2 > N) b =c;
  57.     			else a =c;}
  58.     		ans -=a;}
  59.  
  60. 		printf("Case %d: %lld\n",t+1,ans);}
  61.     return 0;}
  62.  
  63. // look at my code
  64. // my code is amazing
Success #stdin #stdout 0s 3300KB
comments (?)
stdin
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stdout
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Case 1: 7
Case 2: 8
Case 3: 8
Case 4: 9
Case 5: 10
https://ideone.com/52mrhq
cf s01e10
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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