Submission #246378

#	Time	Username	Problem	Language	Result	Execution time	Memory
246378		thebes	Highway design (CEOI12_highway)	C++14	0 / 100	8 ms	1404 KiB

highway

#include "office.h"
#include <bits/stdc++.h>
using namespace std;

int N, M, i, j;
vector<int> seg, cur, mis;

int main(){
    N = GetN();
    for(j=1,M=N;j<=M;j*=3){
        cur.clear();
        for(i=1;i<=M/j;i++)
            cur.push_back(i*j);
        M -= (M%(3*j));
        while(cur.size()%3){
            seg.push_back(cur.back());
            cur.pop_back();
        }
        for(i=0;i<(int)cur.size();i+=3){
            int res = isOnLine(cur[i],cur[i+1],cur[i+2]);
            if(!res){
                if(j>1){
                    res = isOnLine(cur[i],cur[i+1],cur[i+1]-1);
                    if(res) Answer(cur[i], cur[i+1], cur[i+2], cur[i+2]-1);
                    else Answer(cur[i], cur[i]-1, cur[i+1], cur[i+2]);
                    return 0;
                }
                else{
                    assert(false);
                }
            }
        }
    }
    while(seg.size()>2){
        int sz = (int)seg.size()-1;
        int res = isOnLine(seg[sz-2], seg[sz-1], seg[sz]);
        printf("%d %d %d\n",seg[sz-2],seg[sz-1],seg[sz]);
        if(!res){
            if(!isOnLine(seg[sz-2], seg[sz], seg[sz]-1)){
                if(seg[sz-2]-1>seg[sz-1]) Answer(seg[sz-2],seg[sz-2]-1,seg[sz],seg[sz]-1);
                else if(!isOnLine(seg[sz-1],seg[sz],seg[sz]-1)) Answer(seg[sz-2],seg[sz-1],seg[sz],seg[sz]-1);
                else{seg.erase(seg.begin()+sz-1);continue;}
            }
            else Answer(seg[sz-1]-1, seg[sz-1], seg[sz-2], seg[sz]);
            return 0;
        }
        else{
            seg.erase(seg.begin()+sz-1);
            seg.erase(seg.begin()+sz-1);
        }
    }
    Answer(seg[0], seg[0]-1, seg[1], seg[1]-1);
}

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: 0 / 100