Submission #16980

#	Time	Username	Problem	Language	Result	Execution time	Memory
16980		gs14004	Highway design (CEOI12_highway)	C++14	20 / 100	0 ms	1564 KiB

highway

#include "office.h"
#include <vector>
#include <tuple>
using namespace std;

int main(){
	int n = GetN();
	int p1, p2, p3, fnd = 0;
	vector<int> ret;
	if(isOnLine(1, 2, 3)){
		tie(p1, p2) = make_tuple(1, 2);
	}
	else if(isOnLine(1, 4, 5)){
		tie(p1, p2) = make_tuple(1, 4);
	}
	// (1, 2) / (3), (1, 3) / (2), (1) / (2, 3)
	else if(isOnLine(2, 3, 4)){
		tie(p1, p2) = make_tuple(2, 3); 
	}
	else if(isOnLine(2, 3, 5)){
		tie(p1, p2) = make_tuple(2, 3);
	}
	else if(isOnLine(2, 4, 5)){
		tie(p1, p2) = make_tuple(1, 3);
	}
	else{
		tie(p1, p2) = make_tuple(1, 2);
	}
	// five queries!! yay!!! >_<
	for(int i=1; i<=5; i++){
		if(i != p1 && i != p2){
			ret.push_back(i);
		}
	}
	for(int i=6; i<=n; i+=2){
		if(i == n){
			ret.push_back(i);
		}
		if(!isOnLine(p1, i, i+1)){
			ret.push_back(i);
			ret.push_back(i+1);
			fnd++;
			if(fnd >= 2) break;
		}
	}
	int q1 = -1, q2 = -1;
	for(auto &i : ret){
		if(!isOnLine(p1, p2, i)){
			if(q1 == -1) q1 = i;
			else if(q2 == -1){
				q2 = i;
				break;
			}
		}
	}
	Answer(p1, p2, q1, q2);
}

Compilation message (stderr)

highway.cpp: In function 'int main()':
highway.cpp:8:14: warning: unused variable 'p3' [-Wunused-variable]
  int p1, p2, p3, fnd = 0;
              ^
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:33:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &_N);
                     ^

• Subtask 1: 20 / 100