Submission #994642

#	Time	Username	Problem	Language	Result	Execution time	Memory
994642		jonathanirvings	Portal (BOI24_portal)	C++17	100 / 100	31 ms	3576 KiB

Main

//start of jonathanirvings' template v3.0.3 (BETA)

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

// typedef long long LL;
typedef long long LL;
typedef pair<int,int> pii;
typedef pair<LL,LL> pll;
typedef pair<string,string> pss;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pii> vii;
typedef vector<LL> vl;
typedef vector<vl> vvl;

double EPS = 1e-9;
int INF = 1000000005;
long long INFF = 1000000000000000005LL;
double PI = acos(-1);
int dirx[8] = {-1,0,0,1,-1,-1,1,1};
int diry[8] = {0,1,-1,0,-1,1,-1,1};

#ifdef TESTING
  #define DEBUG fprintf(stderr,"====TESTING====\n")
  #define VALUE(x) cerr << "The value of " << #x << " is " << x << endl
  #define debug(...) fprintf(stderr, __VA_ARGS__)
#else
  #define DEBUG
  #define VALUE(x)
  #define debug(...)
#endif

#define FOR(a,b,c) for (int (a)=(b);(a)<(c);++(a))
#define FORN(a,b,c) for (int (a)=(b);(a)<=(c);++(a))
#define FORD(a,b,c) for (int (a)=(b);(a)>=(c);--(a))
#define FORSQ(a,b,c) for (int (a)=(b);(a)*(a)<=(c);++(a))
#define FORC(a,b,c) for (char (a)=(b);(a)<=(c);++(a))
#define FOREACH(a,b) for (auto &(a) : (b))
#define REP(i,n) FOR(i,0,n)
#define REPN(i,n) FORN(i,1,n)
#define MAX(a,b) a = max(a,b)
#define MIN(a,b) a = min(a,b)
#define SQR(x) ((LL)(x) * (x))
#define RESET(a,b) memset(a,b,sizeof(a))
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define ALL(v) v.begin(),v.end()
#define ALLA(arr,sz) arr,arr+sz
#define SIZE(v) (int)v.size()
#define SORT(v) sort(ALL(v))
#define REVERSE(v) reverse(ALL(v))
#define SORTA(arr,sz) sort(ALLA(arr,sz))
#define REVERSEA(arr,sz) reverse(ALLA(arr,sz))
#define PERMUTE next_permutation
#define TC(t) while(t--)

inline string IntToString(LL a){
  char x[100];
  sprintf(x,"%lld",a); string s = x;
  return s;
}

inline LL StringToInt(string a){
  char x[100]; LL res;
  strcpy(x,a.c_str()); sscanf(x,"%lld",&res);
  return res;
}

inline string GetString(void){
  char x[1000005];
  scanf("%s",x); string s = x;
  return s;
}

inline string uppercase(string s){
  int n = SIZE(s);
  REP(i,n) if (s[i] >= 'a' && s[i] <= 'z') s[i] = s[i] - 'a' + 'A';
  return s;
}

inline string lowercase(string s){
  int n = SIZE(s);
  REP(i,n) if (s[i] >= 'A' && s[i] <= 'Z') s[i] = s[i] - 'A' + 'a';
  return s;
}

inline void OPEN (string s) {
  #ifndef TESTING
  freopen ((s + ".in").c_str (), "r", stdin);
  freopen ((s + ".out").c_str (), "w", stdout);
  #endif
}

//end of jonathanirvings' template v3.0.3 (BETA)

using big = __int128;
using pbb = pair<big,big>;

big abs(big x)
{
  if (x < 0) return -x;
  return x;
}

big gcd(big a,big b)
{
  if (b == 0) return a;
  return gcd(b,a%b);
}

int n;
// pll awal;
// pll dat[100005];
pbb awal;
pbb dat[100005];

// void normalize(pll &a, pll &b)
void normalize(pbb &a, pbb &b)
{
  if (a.fi < 0) 
  {
    a.fi *= -1;
    a.se *= -1;
  }
  if (b.fi < 0)
  {
    b.fi *= -1;
    b.se *= -1;
  }
  if (b.fi == 0) return;
  // LL mul = a.fi / b.fi;
  big mul = a.fi / b.fi;
  a.fi -= b.fi * mul;
  a.se -= b.se * mul;
  normalize(b,a);
}

int main()
{
  scanf("%d",&n);
  --n;
  {
    pll tmp;
    scanf("%lld %lld",&tmp.fi,&tmp.se);
    awal = mp(tmp.fi,tmp.se);
  }
  // scanf("%lld %lld",&awal.fi,&awal.se);
  REP(i,n)
  {
    {
      pll tmp;
      scanf("%lld %lld",&tmp.fi,&tmp.se);
      dat[i] = mp(tmp.fi,tmp.se);
    }
    // scanf("%lld %lld",&dat[i].fi,&dat[i].se);
    dat[i].fi -= awal.fi;
    dat[i].se -= awal.se;
  }
  FOR(i,1,n)
  {
    if (dat[i].fi == 0) continue;
    if (dat[0].fi == 0) swap(dat[0],dat[i]);
    else
    {
      normalize(dat[0],dat[i]);
      if (dat[i].fi != 0) swap(dat[0],dat[i]);
    }
  }
  // LL g = 0;
  big g = 0;
  FOR(i,1,n)
  {
    assert(dat[i].fi == 0);
    if (g != 0 || dat[i].se != 0) g = gcd(g,abs(dat[i].se));
  }
  if (g == 0) puts("-1");
  else if (dat[0].fi == 0) puts("-1");
  else printf("%lld\n",(LL)abs(g * dat[0].fi));
}

Compilation message (stderr)

Main.cpp: In function 'std::string uppercase(std::string)':
Main.cpp:34:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   34 | #define FOR(a,b,c) for (int (a)=(b);(a)<(c);++(a))
      |                             ^
Main.cpp:40:18: note: in expansion of macro 'FOR'
   40 | #define REP(i,n) FOR(i,0,n)
      |                  ^~~
Main.cpp:80:3: note: in expansion of macro 'REP'
   80 |   REP(i,n) if (s[i] >= 'a' && s[i] <= 'z') s[i] = s[i] - 'a' + 'A';
      |   ^~~
Main.cpp: In function 'std::string lowercase(std::string)':
Main.cpp:34:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   34 | #define FOR(a,b,c) for (int (a)=(b);(a)<(c);++(a))
      |                             ^
Main.cpp:40:18: note: in expansion of macro 'FOR'
   40 | #define REP(i,n) FOR(i,0,n)
      |                  ^~~
Main.cpp:86:3: note: in expansion of macro 'REP'
   86 |   REP(i,n) if (s[i] >= 'A' && s[i] <= 'Z') s[i] = s[i] - 'A' + 'a';
      |   ^~~
Main.cpp: In function 'int main()':
Main.cpp:34:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   34 | #define FOR(a,b,c) for (int (a)=(b);(a)<(c);++(a))
      |                             ^
Main.cpp:40:18: note: in expansion of macro 'FOR'
   40 | #define REP(i,n) FOR(i,0,n)
      |                  ^~~
Main.cpp:151:3: note: in expansion of macro 'REP'
  151 |   REP(i,n)
      |   ^~~
Main.cpp:34:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   34 | #define FOR(a,b,c) for (int (a)=(b);(a)<(c);++(a))
      |                             ^
Main.cpp:162:3: note: in expansion of macro 'FOR'
  162 |   FOR(i,1,n)
      |   ^~~
Main.cpp:34:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   34 | #define FOR(a,b,c) for (int (a)=(b);(a)<(c);++(a))
      |                             ^
Main.cpp:174:3: note: in expansion of macro 'FOR'
  174 |   FOR(i,1,n)
      |   ^~~
Main.cpp:143:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  143 |   scanf("%d",&n);
      |   ~~~~~^~~~~~~~~
Main.cpp:147:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  147 |     scanf("%lld %lld",&tmp.fi,&tmp.se);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:155:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  155 |       scanf("%lld %lld",&tmp.fi,&tmp.se);
      |       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 1 / 1
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 29 / 29
• Subtask 5: 15 / 15
• Subtask 6: 35 / 35