Submission #17381

#	Time	Username	Problem	Language	Result	Execution time	Memory
17381		eaststar	Highway design (CEOI12_highway)	C++14	100 / 100	0 ms	1508 KiB

highway

#include "office.h"
 
int main() {
    int N = GetN();
    int i, c1 = 0, c2 = 0, j, k, x, y, z;
    if (isOnLine(1, 2, 3)) {
        for (i = 4; i < N && !c2; i += 2){
            if (!isOnLine(1, i, i + 1)){
                if (isOnLine(1, 2, i)){
                    if (c1 == 0)c1 = i + 1;
                    else c2 = i + 1;
                }
                else{
                    if (c1 == 0)c1 = i;
                    else c2 = i;
                }
            }
        }
        if (!c2) c2 = c1 + 1;
        Answer(1, 2, c1, c2);
    }
    else if(isOnLine(4, 5, 6))
    {
        for (i = 7; i < N && !c1; i += 2){
            if (!isOnLine(4, i, i + 1)){
                if (!isOnLine(4, 5, i))c1 = i;
                else c1 = i + 1;
            }
        }
        if (!c1)c1 = N;
        if (!isOnLine(4, 5, 1))c2 = 1;
        else if (!isOnLine(4, 5, 2))c2 = 2;
        else c2 = 3;
        Answer(4, 5, c1, c2);
    }
    else{
        for (i = 1; i <= 4; i++){
            for (j = i + 1; j <= 5; j++){
                for (k = j + 1; k <= 6; k++){
                    if (isOnLine(i, j, k))break;
                }
                if (k != 7)break;
            }
            if (j != 6)break;
        }
        x = i, y = j, z = k;
        for (i = 1; i <= 6 && !c2; i++){
            if (x != i && y != i && z != i){
                if (!isOnLine(x, y, i)){
                    if (!c1)c1 = i;
                    else c2 = i;
                }
                else break;
            }
        }
        if (!c2){
            for (i = i + 1; i <= 6 && !c2; i++){
                if (x != i && y != i && z != i){
                    if (!c1)c1 = i;
                    else if (!c2)c2 = i;
                }
            }
        }
        Answer(x, y, c1, c2);
    }
    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:33:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &_N);
                     ^

• Subtask 1: 100 / 100