Submission #253278

#	Time	Username	Problem	Language	Result	Execution time	Memory
253278		patrikpavic2	Highway design (CEOI12_highway)	C++17	100 / 100	1 ms	640 KiB

highway

#include "office.h"
#include <vector>
#include <cstdlib>
 
using namespace std;
 
int n, uk, los;
 
int main(){
	n = GetN();
	for(int i = 1;i <= 4;i++){
		int ret = isOnLine(1 + (i <= 1), 2 + (i <= 2), 3 + (i <= 3));
		uk += ret;
		if(!ret) los = i;
		if(uk >= 2) break;
	}
	if(uk == 0){
		for(int i = 1;i <= 4;i++){
			for(int j = i + 1;j <= 4;j++){
				if(isOnLine(i, j, 5)){
					int k = 1, l = 1;
					while(k == i || k == j) k++;
					while(l == i || l == j || l == k) l++;
					Answer(i, j, k, l);
					return 0;
				}
			}
		}
	}
	if(uk > 1){
		int dos = 0, pr = 0, dr = 0;
		int i = 5;
		while(i < n - 2 && dos < 2){
			int ret = isOnLine(1, i, i + 1);
			if(!ret){
				int ret2 = isOnLine(1, 2, i);
				if(!dos)
					pr = (ret2 ? i + 1 : i);
				else
					dr = (ret2 ? i + 1 : i);
				dos++;
			}
			i += 2;
		}
		if(dos == 2){
			Answer(1, 2, pr, dr);
			return 0;
		}
		if(dos == 0){
			Answer(1, 2, n - 1, n);
			return 0;
		}
		if(i == n - 1 || !isOnLine(1, n - 1, n)){
			int ret2 = isOnLine(1, 2, n);
			Answer(1, 2, pr, (ret2 ? n - 1 : n));
			return 0;
		}		
		else{
			Answer(1, 2, pr, n - 2);
			return 0;
		}
	}
	int A = 1, B = 1;
	while(A == los) A++;
	while(B == los || B == A) B++;
	int i = 5;
	while(i < n - 2){
		int ret = isOnLine(1, i, i + 1);
		if(!ret){
			int ret2 = isOnLine(1, 2, i);
			Answer(A, B, los, (ret2 ? i + 1 : i));
			return 0;
		}
	}
	Answer(A, B, los, (isOnLine(A, B, n) ? n - 1 : n));
	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