Submission #17404

#	Time	Username	Problem	Language	Result	Execution time	Memory
17404		eaststar	Highway design (CEOI12_highway)	C++14	100 / 100	0 ms	1508 KiB

highway

#include "office.h"
 
int main(){
    int i,j,k,a,b,x=0,y=0,N=GetN();
    if(isOnLine(1,2,3)){
        a=1,b=2;
        for(i=4;i<N;i+=2)if(!isOnLine(a,i,i+1))break;
        if(isOnLine(a,b,i))x=i+1;
        else x=i;
        for(i+=2;i<N;i+=2)if(!isOnLine(a,i,i+1))break;
        if(isOnLine(a,b,i))y=i+1;
        else y=i;
    }
    else if(isOnLine(4,5,6)){
        a=4,b=5;
        for(i=1;i<4;++i)if(!isOnLine(a,b,i))break;
        x=i;
        for(i=7;i<N;i+=2)if(!isOnLine(a,i,i+1))break;
        if(isOnLine(a,b,i))y=i+1;
        else y=i;
    }
    else{
        for(i=1;i<5;++i){
            for(j=i+1;j<6;++j){
                for(k=j+1;k<7;++k)if(isOnLine(i,j,k))break;
                if(k<7)break;
            }
            if(j<6)break;
        }
        a=i,b=j;
        for(i=1;i<7&&!y;++i)if(i!=a&&i!=b&&i!=k&&!isOnLine(a,b,i)){
            if(x)y=i;
            else x=i;
        }
    }
    Answer(a,b,x,y);
}

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:33:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &_N);
                     ^

• Subtask 1: 100 / 100