Submission #228860

#	Time	Username	Problem	Language	Result	Execution time	Memory
228860		super_j6	Highway design (CEOI12_highway)	C++14	100 / 100	6 ms	1152 KiB

highway

#include "office.h"
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
#include <string.h>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second

int n;
int a, b, c, d;
vector<int> v[2];

bool works(int x, int y, int z){
    string s(3, ' ');
    s[0] = x + '0', s[1] = y + '0', s[2] = z + '0';
    sort(s.begin(), s.end());
    return s != "123" && s != "145";
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	n = GetN();
	
	for(a = 1, b = 2; b < n && v[0].size() < 2; b += 2){
	    v[isOnLine(a, b, b + 1)].push_back(b);
	}
	
	if(!v[1].empty() || v[0].size() < 2){
	    b = v[1][0];
	    c = v[0][0] + isOnLine(a, b, v[0][0]);
	    d = v[0].size() < 2 ? n : v[0][1] + isOnLine(a, b, v[0][1]);
	}else{
	    for(a = 1, d = 0; a < 3 && !d; a++)
	    for(b = a + 1; b < 6 && !d; b++)
        for(c = b + 1; c < 6 && !d; c++){
            d = works(a, b, c) && isOnLine(a, b, c);
        }
        if(!d) a = 4, b = 5, c = 6;
        a--, b--, c--;
        d = 15 - a - b - c;
        for(c = 1; c == a || c == b || c == 15 - a - b - d; c++);
        d -= c;
        if(works(a, b, c) && isOnLine(a, b, c)) swap(c, d), d = 0;
        if(d && works(a, b, d) && isOnLine(a, b, d)) d = 0;
        if(!d){
            for(d = 6; isOnLine(d, d + 1, d + 2); d += 3);
            for(; d % 3 < 2 && isOnLine(a, b, d); d++);
        }
	}
	
	Answer(a, b, c, d);

	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: 100 / 100