Submission #107446

#	Time	Username	Problem	Language	Result	Execution time	Memory
107446		SamAnd	Highway design (CEOI12_highway)	C++17	0 / 100	3 ms	804 KiB

highway

#include <bits/stdc++.h>
#include "office.h"
using namespace std;
const int N = 100005;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

int n;
int a[N];

int main()
{
    for (int i = 1; i <= n; ++i)
        a[i] = i;
    for (int i = n; i >= 1; --i)
    {
        int j = rnd() % i + 1;
        swap(a[i], a[j]);
    }
    n = GetN();
    if (isOnLine(1, 2, 3))
    {
        int x = -1, y = -1;

        for (int j = 1; j <= n; ++j)
        {
            int i = a[j];
            if (i < 4)
                continue;
            if (!isOnLine(1, 2, i))
            {
                if (x == -1)
                    x = i;
                else
                {
                    y = i;
                    Answer(1, 2, x, y);
                    return 0;
                }
            }
        }
    }
    else
    {
        if (isOnLine(1, 2, 4))
        {
            int x = 3, y = -1;
            for (int j = 1; j <= n; ++j)
            {
                int i = a[j];
                if (i < 5)
                    continue;
                if (!isOnLine(1, 2, i))
                {
                    y = i;
                    Answer(1, 2, x, y);
                    return 0;
                }
            }
        }
        else if (isOnLine(1, 3, 4))
        {
            int x = 2, y = -1;
            for (int j = 1; j <= n; ++j)
            {
                int i = a[j];
                if (i < 5)
                    continue;
                if (!isOnLine(1, 3, i))
                {
                    y = i;
                    Answer(1, 3, x, y);
                    return 0;
                }
            }
        }
        else
        {
            int x = 1, y = -1;
            for (int j = 1; j <= n; ++j)
            {
                int i = a[j];
                if (i < 5)
                    continue;
                if (!isOnLine(2, 3, i))
                {
                    y = i;
                    Answer(2, 3, x, y);
                    return 0;
                }
            }
        }
    }
    return 0;
}

Compilation message (stderr)

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