Submission #239353

#	Time	Username	Problem	Language	Result	Execution time	Memory
239353		blue	Highway design (CEOI12_highway)	C++11	0 / 100	34 ms	1536 KiB

highway

#include "office.h"
#include <random>
#include <algorithm>
using namespace std;

bool randsort(int a, int b)
{
    return rand() % 2;
}

int main()
{
    int N = GetN();

    int a[N];
    for(int i = 0; i < N; i++) a[i] = i+1;
    sort(a, a+N, randsort);


    int a1, a2;
    for(a2 = 1; a2 < N; a2++)
    {
        for(int i = 0; i < 9 && a2+i < N; i++) if(isOnLine(a[0], a[a1], a[a2]))
        {
            if(a1 > 1 && a2 - a1 > 1) Answer(a[0], a[a1], a[1], a[a1+1]);
            else Answer(a[0], a[a1], a[1], a[2]);
            return 0;
        }
    }


    return 0;
}

Compilation message (stderr)

highway.cpp: In function 'int main()':
highway.cpp:20:9: warning: 'a1' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int a1, a2;
         ^~
office.c: In function 'int isOnLine(int, int, int)':
office.c:85:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
     _Fin(0, "Protocol error");
                             ^
office.c:88:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
     _Fin(0, "Protocol error");
                             ^
office.c:92:37: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
     _Fin(false, "Too many questions");
                                     ^
office.c:83:7: warning: unused variable 'i' [-Wunused-variable]
   int i;
       ^
office.c: In function 'void Answer(int, int, int, int)':
office.c:123:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
     _Fin(0, "Protocol error");
                             ^
office.c:128:44: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
       if( (-_Apa[na1]==_N-3) && (na2!=na1) && (nb2!=na1) ||
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
office.c:130:30: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
          _Fin(true, "Correct");
                              ^
office.c:132:36: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
          _Fin(false, "Wrong answer");
                                    ^
office.c:134:44: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
       if( (-_Apa[na2]==_N-3) && (na1!=na2) && (nb1!=na2) ||
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
office.c:136:30: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
          _Fin(true, "Correct");
                              ^
office.c:138:36: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
          _Fin(false, "Wrong answer");
                                    ^
office.c:140:33: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
       _Fin(false, "Wrong answer");
                                 ^
office.c:142:23: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   _Fin(true, "Correct");
                       ^
office.c:120:27: warning: unused variable 'pont' [-Wunused-variable]
   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]
     scanf("%d", &_N);
     ~~~~~^~~~~~~~~~~

• Subtask 1: 0 / 100