Submission #187623


Source Code Expand

#include<bits/stdc++.h>
using namespace std;

#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

#define mygc(c) (c)=getchar_unlocked()
void reader(int *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}
void reader(int *x, int *y){reader(x);reader(y);}

int N, D, X, Y;
double pw[1200], fact[1200];

double C(int a, int b){
  return exp( pw[a] + fact[a] - fact[a-b] - fact[b] );
}

double solve(int N, int X){
  int i, j;
  
  if(N < X || N%2 != X%2) return 0;

  i = X + (N-X)/2;
  j = (N-X)/2;

  return C(i+j, i);
}

int main(){
  int i, j, k;
  double res = 0;

  pw[0] = 0; fact[0] = 0;
  REP(i,1,1200) pw[i] = pw[i-1] + log(0.5);
  REP(i,1,1200) fact[i] = fact[i-1] + log(i);

  reader(&N,&D);
  reader(&X,&Y);


  if(X%D || Y%D){
    puts("0"); return 0;
  }

  X /= D;
  Y /= D;
  if(X < 0) X = -X;
  if(Y < 0) Y = -Y;

  rep(i,N+1) res += solve(i, X) * solve(N-i, Y) * C(N,i);
  printf("%.15f\n", res);

  return 0;
}

Submission Info

Submission Time
Task D - 大ジャンプ
User LayCurse
Language C++ (G++ 4.6.4)
Score 101
Code Size 1111 Byte
Status AC
Exec Time 23 ms
Memory 932 KB

Judge Result

Set Name part1 part2 All
Score / Max Score 90 / 90 10 / 10 1 / 1
Status
AC × 23
AC × 36
AC × 68
Set Name Test Cases
part1 test_1_151403858_0_0AB.txt, test_1_1_0_1AB.txt, test_1_1_2_0AB.txt, test_1_200416616_-430405070_-79858930AB.txt, test_1_320861287_0_0AB.txt, test_1_445441131_0_0AB.txt, test_2_91743015_0_183486030AB.txt, test_3_165357536_496072608_0AB.txt, test_3_357154050_-106436394_768502001AB.txt, test_3_721501125_-568833455_353553641AB.txt, test_3_893846474_0_0AB.txt, test_4_291388018_-291388018_0AB.txt, test_5_318547875_955643625_-637095750AB.txt, test_5_704387671_-704387671_0AB.txt, test_5_82323965_639854915_-688317394AB.txt, test_6_187422602_374845204_-374845204AB.txt, test_6_346164451_0_0AB.txt, test_6_99058019_194123640_-837769837AB.txt, test_7_166330212_166330212_-332660424AB.txt, test_7_89698746_448493730_-179397492AB.txt, test_8_10000000_-40000000_-40000000AB.txt, test_8_10000000_0_80000000AB.txt, test_8_10000000_80000000_0AB.txt
part2 test_10_227248639_454497278_0B.txt, test_11_692637325_-181424149_-938839075B.txt, test_13_260236679_-780710037_-520473358B.txt, test_13_269280357_807841071_269280357B.txt, test_13_96859935_0_-581159610B.txt, test_16_40374395_-40374395_-565241530B.txt, test_1_151403858_0_0AB.txt, test_1_1_0_1AB.txt, test_1_1_2_0AB.txt, test_1_200416616_-430405070_-79858930AB.txt, test_1_320861287_0_0AB.txt, test_1_445441131_0_0AB.txt, test_21_304856339_609712678_914569017B.txt, test_26_214390232_-857560928_428780464B.txt, test_2_91743015_0_183486030AB.txt, test_30_10000000_-300000000_0B.txt, test_30_10000000_0_300000000B.txt, test_30_10000000_150000000_-150000000B.txt, test_30_54228128_0_813421920B.txt, test_3_165357536_496072608_0AB.txt, test_3_357154050_-106436394_768502001AB.txt, test_3_721501125_-568833455_353553641AB.txt, test_3_893846474_0_0AB.txt, test_4_291388018_-291388018_0AB.txt, test_5_318547875_955643625_-637095750AB.txt, test_5_704387671_-704387671_0AB.txt, test_5_82323965_639854915_-688317394AB.txt, test_6_187422602_374845204_-374845204AB.txt, test_6_346164451_0_0AB.txt, test_6_99058019_194123640_-837769837AB.txt, test_7_166330212_166330212_-332660424AB.txt, test_7_89698746_448493730_-179397492AB.txt, test_8_10000000_-40000000_-40000000AB.txt, test_8_10000000_0_80000000AB.txt, test_8_10000000_80000000_0AB.txt, test_9_283198156_849594468_849594468B.txt
All test_1000_1000000_-500000000_500000000.txt, test_1000_1000000_0_-1000000000.txt, test_1000_1000000_1000000000_0.txt, test_1000_150305_97998860_-32315575.txt, test_1000_1_0_0.txt, test_1000_1_2_0.txt, test_1000_1_2_2.txt, test_1000_3308678_-800700076_-350719868.txt, test_1000_3608549_811923525_689232859.txt, test_1000_3728577_-145414503_-969430020.txt, test_1000_537976_11297496_224335992.txt, test_10_227248639_454497278_0B.txt, test_11_692637325_-181424149_-938839075B.txt, test_130_95365311_-667557177_-286095933.txt, test_131_18204705_-145637640_0.txt, test_13_260236679_-780710037_-520473358B.txt, test_13_269280357_807841071_269280357B.txt, test_13_96859935_0_-581159610B.txt, test_16_40374395_-40374395_-565241530B.txt, test_1_151403858_0_0AB.txt, test_1_1_0_1AB.txt, test_1_1_2_0AB.txt, test_1_200416616_-430405070_-79858930AB.txt, test_1_320861287_0_0AB.txt, test_1_445441131_0_0AB.txt, test_210_28974130_0_260767170.txt, test_217_321156_24407856_22480920.txt, test_21_304856339_609712678_914569017B.txt, test_26_214390232_-857560928_428780464B.txt, test_289_421462830_-487186374_-417635361.txt, test_2_91743015_0_183486030AB.txt, test_30_10000000_-300000000_0B.txt, test_30_10000000_0_300000000B.txt, test_30_10000000_150000000_-150000000B.txt, test_30_54228128_0_813421920B.txt, test_339_4475128_957677392_281933064.txt, test_3_165357536_496072608_0AB.txt, test_3_357154050_-106436394_768502001AB.txt, test_3_721501125_-568833455_353553641AB.txt, test_3_893846474_0_0AB.txt, test_480_402960_-131767920_-34654560.txt, test_4_291388018_-291388018_0AB.txt, test_507_3516183_-879045750_-253165176.txt, test_515_8606048_-25818144_8606048.txt, test_522_2286376_-230923976_-18291008.txt, test_5_318547875_955643625_-637095750AB.txt, test_5_704387671_-704387671_0AB.txt, test_5_82323965_639854915_-688317394AB.txt, test_676_198114948_0_792459792.txt, test_688_151937211_-286341114_10198771.txt, test_6_187422602_374845204_-374845204AB.txt, test_6_346164451_0_0AB.txt, test_6_99058019_194123640_-837769837AB.txt, test_71_367604060_367604060_0.txt, test_752_120973200_0_-725839200.txt, test_772_881340073_0_0.txt, test_777_125719576_-499451637_822057459.txt, test_7_166330212_166330212_-332660424AB.txt, test_7_89698746_448493730_-179397492AB.txt, test_839_166155061_0_-332310122.txt, test_839_923157_923157_564972084.txt, test_849_415705_290993500_0.txt, test_873_418406_2928842_322172620.txt, test_8_10000000_-40000000_-40000000AB.txt, test_8_10000000_0_80000000AB.txt, test_8_10000000_80000000_0AB.txt, test_981_159373724_-637494896_-159373724.txt, test_9_283198156_849594468_849594468B.txt
Case Name Status Exec Time Memory
sample_01.txt AC 22 ms 788 KB
sample_02.txt AC 20 ms 796 KB
sample_03.txt AC 22 ms 924 KB
test_1000_1000000_-500000000_500000000.txt AC 21 ms 920 KB
test_1000_1000000_0_-1000000000.txt AC 21 ms 800 KB
test_1000_1000000_1000000000_0.txt AC 21 ms 804 KB
test_1000_150305_97998860_-32315575.txt AC 20 ms 800 KB
test_1000_1_0_0.txt AC 21 ms 796 KB
test_1000_1_2_0.txt AC 21 ms 924 KB
test_1000_1_2_2.txt AC 21 ms 804 KB
test_1000_3308678_-800700076_-350719868.txt AC 20 ms 748 KB
test_1000_3608549_811923525_689232859.txt AC 20 ms 800 KB
test_1000_3728577_-145414503_-969430020.txt AC 20 ms 748 KB
test_1000_537976_11297496_224335992.txt AC 20 ms 804 KB
test_10_227248639_454497278_0B.txt AC 20 ms 800 KB
test_11_692637325_-181424149_-938839075B.txt AC 20 ms 924 KB
test_130_95365311_-667557177_-286095933.txt AC 21 ms 804 KB
test_131_18204705_-145637640_0.txt AC 21 ms 796 KB
test_13_260236679_-780710037_-520473358B.txt AC 21 ms 808 KB
test_13_269280357_807841071_269280357B.txt AC 21 ms 928 KB
test_13_96859935_0_-581159610B.txt AC 23 ms 776 KB
test_16_40374395_-40374395_-565241530B.txt AC 21 ms 800 KB
test_1_151403858_0_0AB.txt AC 21 ms 928 KB
test_1_1_0_1AB.txt AC 22 ms 920 KB
test_1_1_2_0AB.txt AC 21 ms 748 KB
test_1_200416616_-430405070_-79858930AB.txt AC 21 ms 928 KB
test_1_320861287_0_0AB.txt AC 21 ms 924 KB
test_1_445441131_0_0AB.txt AC 21 ms 808 KB
test_210_28974130_0_260767170.txt AC 20 ms 928 KB
test_217_321156_24407856_22480920.txt AC 21 ms 800 KB
test_21_304856339_609712678_914569017B.txt AC 20 ms 804 KB
test_26_214390232_-857560928_428780464B.txt AC 21 ms 924 KB
test_289_421462830_-487186374_-417635361.txt AC 21 ms 928 KB
test_2_91743015_0_183486030AB.txt AC 21 ms 920 KB
test_30_10000000_-300000000_0B.txt AC 21 ms 728 KB
test_30_10000000_0_300000000B.txt AC 21 ms 924 KB
test_30_10000000_150000000_-150000000B.txt AC 20 ms 928 KB
test_30_54228128_0_813421920B.txt AC 21 ms 920 KB
test_339_4475128_957677392_281933064.txt AC 20 ms 804 KB
test_3_165357536_496072608_0AB.txt AC 21 ms 928 KB
test_3_357154050_-106436394_768502001AB.txt AC 21 ms 800 KB
test_3_721501125_-568833455_353553641AB.txt AC 20 ms 844 KB
test_3_893846474_0_0AB.txt AC 20 ms 928 KB
test_480_402960_-131767920_-34654560.txt AC 21 ms 920 KB
test_4_291388018_-291388018_0AB.txt AC 23 ms 800 KB
test_507_3516183_-879045750_-253165176.txt AC 22 ms 928 KB
test_515_8606048_-25818144_8606048.txt AC 21 ms 928 KB
test_522_2286376_-230923976_-18291008.txt AC 21 ms 812 KB
test_5_318547875_955643625_-637095750AB.txt AC 20 ms 928 KB
test_5_704387671_-704387671_0AB.txt AC 20 ms 792 KB
test_5_82323965_639854915_-688317394AB.txt AC 21 ms 796 KB
test_676_198114948_0_792459792.txt AC 22 ms 736 KB
test_688_151937211_-286341114_10198771.txt AC 20 ms 800 KB
test_6_187422602_374845204_-374845204AB.txt AC 21 ms 792 KB
test_6_346164451_0_0AB.txt AC 20 ms 800 KB
test_6_99058019_194123640_-837769837AB.txt AC 20 ms 920 KB
test_71_367604060_367604060_0.txt AC 20 ms 796 KB
test_752_120973200_0_-725839200.txt AC 20 ms 800 KB
test_772_881340073_0_0.txt AC 21 ms 800 KB
test_777_125719576_-499451637_822057459.txt AC 21 ms 932 KB
test_7_166330212_166330212_-332660424AB.txt AC 20 ms 796 KB
test_7_89698746_448493730_-179397492AB.txt AC 21 ms 932 KB
test_839_166155061_0_-332310122.txt AC 22 ms 804 KB
test_839_923157_923157_564972084.txt AC 21 ms 804 KB
test_849_415705_290993500_0.txt AC 20 ms 796 KB
test_873_418406_2928842_322172620.txt AC 21 ms 924 KB
test_8_10000000_-40000000_-40000000AB.txt AC 21 ms 920 KB
test_8_10000000_0_80000000AB.txt AC 20 ms 808 KB
test_8_10000000_80000000_0AB.txt AC 21 ms 928 KB
test_981_159373724_-637494896_-159373724.txt AC 21 ms 928 KB
test_9_283198156_849594468_849594468B.txt AC 21 ms 928 KB