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  1. #include <iomanip>
  2. #include <iostream>
  3. #include <vector>
  4. #include <string>
  5. #include <cctype>
  6. #include <iterator>
  7. #include <array>
  8. #include <stdio.h>
  9. #include <string.h>
  10. #include <cstddef>
  11. #include <string>
  12. #include <sstream>
  13. #include <math.h>
  14. #include <cmath>
  15. #include <stdio.h>
  16. #include <stdlib.h>
  17. #include <string.h>
  18. #include <algorithm>
  19.  
  20. using std::vector; using std::cout; using std::endl;
  21. using std::cin; using std::string; using std::end;
  22. using std::begin; using std::stringstream;
  23. using namespace std;
  24.  
  25. template<typename T>
  26. std::vector<T> split(const std::string& line) {
  27.     std::istringstream is(line);
  28.     return std::vector<T>(std::istream_iterator<T>(is), std::istream_iterator<T>());
  29. }
  30.  
  31. long long  nwd(long long a, long long b){
  32.     long long  c;
  33.     while(b != 0){
  34.         c = a % b;
  35.         a = b;
  36.         b = c;
  37.     }
  38.     return a;
  39. }
  40.  
  41. void add(long long *x1, long long *y1, long long *x2, long long *y2){
  42.     long long bottom = (*y1) * (*y2);
  43.     long long top = ((*x1) * (*y2)) + ((*x2) * (*y1));
  44.     //cout << bottom << " " << top << endl;
  45.     long long frac;
  46.     if(bottom != 0||top != 0){
  47.         frac = nwd(top,bottom);
  48.     }else{
  49.         frac = 1;
  50.     }
  51.     string sign = "";
  52.     if(top * bottom < 0){
  53.         sign = "-";
  54.     }else{
  55.         sign = "";
  56.     }
  57.     printf("%s%lld / %lld\n",sign.c_str(),abs(top/frac),abs(bottom/frac) );
  58. }
  59.  
  60. void sub(long long *x1, long long *y1,long long *x2, long long *y2){
  61.     long long bottom = (*y1) * (*y2);
  62.     long long top = ((*x1) * (*y2)) - ((*x2) * (*y1));
  63.     long long frac;
  64.     if(bottom != 0||top != 0){
  65.         frac = nwd(top,bottom);
  66.     }else{
  67.         frac = 1;
  68.     }
  69.     string sign = "";
  70.     if(top * bottom < 0){
  71.         sign = "-";
  72.     }else{
  73.         sign = "";
  74.     }
  75.     printf("%s%lld / %lld\n",sign.c_str(),abs(top/frac),abs(bottom/frac) );
  76. }
  77.  
  78. void divi(long long *x1, long long *y1, long long *x2, long long *y2){
  79.     long long top = (*x1) * (*y2);
  80.     long long bottom = (*x2) * (*y1);
  81.     long long frac;
  82.     if(bottom != 0||top != 0){
  83.         frac = nwd(top,bottom);
  84.     }else{
  85.         frac = 1;
  86.     }
  87.     string sign = "";
  88.     if(top * bottom < 0){
  89.         sign = "-";
  90.     }else{
  91.         sign = "";
  92.     }
  93.     printf("%s%lld / %lld\n",sign.c_str(),abs(top/frac),abs(bottom/frac) );
  94. }
  95.  
  96. void mult(long long *x1, long long *y1, long long *x2, long long *y2){
  97.     long long top = (*x1) * (*x2);
  98.     long long bottom = (*y2) * (*y1);
  99.     long long frac;
  100.     if(bottom != 0||top != 0){
  101.         frac = nwd(top,bottom);
  102.     }else{
  103.         frac = 1;
  104.     }
  105.     string sign = "";
  106.     if(top * bottom < 0){
  107.         sign = "-";
  108.     }else{
  109.         sign = "";
  110.     }
  111.     printf("%s%lld / %lld\n",sign.c_str(),abs(top/frac),abs(bottom/frac) );
  112. }
  113.  
  114. int main()
  115. {
  116.  
  117.     int numOp;
  118.     scanf("%d", &numOp);
  119.     while(numOp != 0){
  120.         long long x1,x2,y1,y2;
  121.         char op[2];
  122.         scanf("%lld %lld %s %lld %lld", &x1, &y1, op, &x2, &y2);
  123.         if( op[0] == '+'){
  124.             add(&x1, &y1, &x2,&y2);
  125.         }
  126.         else if(op[0] == '-'){
  127.             sub(&x1,&y1,&x2,&y2);
  128.         }
  129.         else if(op[0] == '/'){
  130.             divi(&x1,&y1,&x2,&y2);
  131.         }
  132.         else{
  133.             mult(&x1,&y1,&x2,&y2);
  134.         }
  135.         numOp--;
  136.     }
  137.     return 0;   
  138. }
Success #stdin #stdout 0s 3420KB
comments (?)
stdin
copy 
4
1 3 + 1 2
1 3 - 1 2
123 287 / 81 -82
12 -3 * -1 -1
stdout
copy 
5 / 6
-1 / 6
-82 / 189
-4 / 1
https://ideone.com/jBddSI
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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