Submission #82456

#	Time	Username	Problem	Language	Result	Execution time	Memory
82456		Plurm	Highway design (CEOI12_highway)	C++11	100 / 100	3 ms	864 KiB

highway

#include <bits/stdc++.h>
#include "office.h"
using namespace std;
int main(){
	int n = GetN();
	int use = -1;
	if(isOnLine(1,2,3)){
		for(int i = 4; i+1 <= n; i += 2){
			if(!isOnLine(1,i,i+1)){
				int b1 = isOnLine(1,2,i);
				if(!b1){
					if(use == -1){
						use = i;
					}else{
						Answer(1,2,use,i);
						return 0;
					}
				}else{
					if(use == -1){
						use = i+1;
					}else{
						Answer(1,2,use,i+1);
						return 0;
					}
				}
			}
		}
		Answer(1,2,use,n);
	}else if(isOnLine(1,4,5)){
		if(isOnLine(1,3,4)) use = 3;
		else use = 2;
		for(int i = 6; i+1 <= n; i += 2){
			if(!isOnLine(1,i,i+1)){
				int b1 = isOnLine(1,4,i);
				if(!b1){
					Answer(1,4,use,i);
					return 0;
				}else{
					Answer(1,4,use,i+1);
					return 0;
				}
			}
		}
		Answer(1,4,use,n);
	}else if(isOnLine(2,3,4)){
		for(int i = 6; i+1 <= n; i += 2){
			if(!isOnLine(2,i,i+1)){
				int b1 = isOnLine(2,3,i);
				if(!b1){
					Answer(2,3,1,i);
					return 0;
				}else{
					Answer(2,3,1,i+1);
					return 0;
				}
			}
		}
		Answer(2,3,1,n);
	}else if(isOnLine(1,3,4)){
		Answer(1,3,2,5);
	}else{
		if(isOnLine(2,3,5)){
			Answer(1,4,2,3);
		}else if(isOnLine(2,4,5)){
			Answer(1,3,2,4);
		}else if(isOnLine(3,4,5)){
			Answer(1,2,3,4);
		}else if(isOnLine(1,2,4)){
			Answer(1,2,3,5);
		}else if(isOnLine(1,2,5)){
			Answer(1,2,3,4);
		}else if(isOnLine(1,3,5)){
			Answer(1,3,2,4);
		}else{
			throw 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