Submission #465115

#	Time	Username	Problem	Language	Result	Execution time	Memory
465115		AlexLuchianov	Highway design (CEOI12_highway)	C++14	100 / 100	1 ms	584 KiB

highway

#include <iostream>
#include "office.h"

int main() {
  int n = GetN();
  if(isOnLine(1, 2, 3) == 1) {
    int last = 0;
    for(int i = 4; i <= n; i += 2) {
      if(i + 1 <= n) {
        if(isOnLine(1, i, i + 1) == 0) {
          if(isOnLine(1, 2, i) == 0) {
            if(last == 0) 
              last = i;
            else {
              Answer(1, 2, last, i);
              return 0;
            }
          } else {
            if(last == 0)
              last = i + 1;
            else {
              Answer(1, 2, last, i + 1);
              return 0;
            }
          }
        }
      } else {
        //no need to ask
        Answer(1, 2, last, n);
        return 0;
      }
    }
  } else {
    if(isOnLine(4, 5, 6) == 0) {
      for(int i = 1;i <= 5; i++)
        for(int j = i + 1; j <= 5; j++)
          for(int h = j + 1; h <= 5; h++) 
            if(isOnLine(i, j, h) == 1) {
              int last = 0;
              for(int k = 1; k <= 6; k++)
                if(k != i && k != j && k != h && isOnLine(i, j, k) == 0) {
                  if(last == 0)
                    last = k;
                  else {
                    Answer(i, j, last, k);
                    return 0;
                  }
                }
            }
    } else {
      int last = 0;
      if(isOnLine(4, 5, 1) == 0)
        last = 1;
      else if(isOnLine(4, 5, 2) == 0)
        last = 2;
      else
        last = 3;
      for(int i = 7; i <= n; i += 2) {
        if(i + 1 <= n) {
          if(isOnLine(4, i, i + 1) == 0) {
            if(isOnLine(4, 5, i) == 0) {
              Answer(4, 5, last, i);
              return 0;
            } else {
              Answer(4, 5, last, i + 1);
              return 0;
            }
          }
        } else {
          Answer(4, 5, last, i);
          return 0;
        }
      }
    }
  }
  return 0;
}

Compilation message (stderr)

office.c: In function 'int isOnLine(int, int, int)':
office.c:85:13: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   85 |     _Fin(0, "Protocol error");
      |             ^~~~~~~~~~~~~~~~
office.c:88:13: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   88 |     _Fin(0, "Protocol error");
      |             ^~~~~~~~~~~~~~~~
office.c:92:17: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   92 |     _Fin(false, "Too many questions");
      |                 ^~~~~~~~~~~~~~~~~~~~
office.c:83:7: warning: unused variable 'i' [-Wunused-variable]
   83 |   int i;
      |       ^
office.c: In function 'void Answer(int, int, int, int)':
office.c:123:13: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  123 |     _Fin(0, "Protocol error");
      |             ^~~~~~~~~~~~~~~~
office.c:128:44: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  128 |       if( (-_Apa[na1]==_N-3) && (na2!=na1) && (nb2!=na1) ||
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
office.c:130:21: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  130 |          _Fin(true, "Correct");
      |                     ^~~~~~~~~
office.c:132:22: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  132 |          _Fin(false, "Wrong answer");
      |                      ^~~~~~~~~~~~~~
office.c:134:44: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  134 |       if( (-_Apa[na2]==_N-3) && (na1!=na2) && (nb1!=na2) ||
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
office.c:136:21: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  136 |          _Fin(true, "Correct");
      |                     ^~~~~~~~~
office.c:138:22: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  138 |          _Fin(false, "Wrong answer");
      |                      ^~~~~~~~~~~~~~
office.c:140:19: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  140 |       _Fin(false, "Wrong answer");
      |                   ^~~~~~~~~~~~~~
office.c:142:14: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  142 |   _Fin(true, "Correct");
      |              ^~~~~~~~~
office.c:120:27: warning: unused variable 'pont' [-Wunused-variable]
  120 |   int na1, nb1, na2, nb2, pont;
      |                           ^~~~
office.c: In function 'void _doInit()':
office.c:33:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     scanf("%d", &_N);
      |     ~~~~~^~~~~~~~~~~

• Subtask 1: 100 / 100