Submission #253250

#	Time	Username	Problem	Language	Result	Execution time	Memory
253250		keko37	Highway design (CEOI12_highway)	C++14	100 / 100	1 ms	768 KiB

highway

#include"office.h"
#include<bits/stdc++.h>

using namespace std;

int n;

/*int GetN () {}
int isOnLine (int x, int y, int z) {}
void Answer(int a1, int b1, int a2, int b2) {}*/

int main () {
    n = GetN();
    if (isOnLine(1, 2, 3)) {
        vector <int> v;
        for (int i = 4; i + 1 <= n && v.size() < 2; i += 2) {
            if (isOnLine(1, i, i + 1)) continue;
            if (isOnLine(2, 3, i) == 0) v.push_back(i); else v.push_back(i + 1);
        }
        if (v.size() == 1) v.push_back(v.back() + 1);
        Answer(1, 2, v[0], v[1]);
    } else {
        int a = -1, b = -1, c = -1, d = -1;
        if (isOnLine(1, 2, 4)) a = 1, b = 2, c = 4, d = 3;
        if (isOnLine(1, 3, 4)) a = 1, b = 3, c = 4, d = 2;
        if (isOnLine(2, 3, 4)) a = 2, b = 3, c = 4, d = 1;
        if (a != -1) {
            int res = -1;
            for (int i = 5; i + 1 <= n; i += 2) {
                if (isOnLine(a, i, i + 1)) continue;
                if (i + 3 > n) {
                    res = i;
                } else {
                    if (isOnLine(b, c, i) == 0) res = i; else res = i + 1;
                }
                break;
            }
            Answer(a, b, d, res);
        } else {
            if (isOnLine(1, 2, 5)) Answer(1, 2, 3, 4);
            else if (isOnLine(1, 3, 5)) Answer(1, 3, 2, 4);
            else if (isOnLine(1, 4, 5)) Answer(1, 4, 2, 3);
            else if (isOnLine(2, 3, 5)) Answer(2, 3, 1, 4);
            else if (isOnLine(2, 4, 5)) Answer(2, 4, 1, 3);
            else if (isOnLine(3, 4, 5)) Answer(1, 2, 3, 4);
        }
    }
    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