Submission #1111053

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111053		epicci23	Vision Program (IOI19_vision)	C++17	Compilation error	0 ms	0 KiB

vision

#include "vision.h"
#include "bits/stdc++.h"
//#define int long long
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;

int N,M;

inline int get_ind(int a,int b){
  return a*M+b;
}

inline bool is_valid(int a,int b){
  return a>=0 && a<N && b>=0 && b<M;
}

void construct_network(int n, int m, int k){
  N=n,M=m;
  if(max(n,m)<=30){

  	vector<int> query;

  	for(int i=0;i<n;i++){
      for(int j=0;j<m;j++){
         vector<int> sor;
         int a = i, b = j + k; 
  	     for(int u=0;u<max(N,M);u++){
          if(is_valid(a,b) && abs(a-i)+abs(b-j)==k) sor.push_back(get_ind(a,b));
          a++,b--;
  	     }
  	     int a = i, b = j - k;
  	     for(int u=0;u<max(N,M);u++){
          if(is_valid(a,b) && abs(a-i)+abs(b-j)==k) sor.push_back(get_ind(a,b));
          a++,b++;
  	     }
  	     if(sor.empty()) continue;
  	     vector<int> xd;
  	     xd.push_back(get_ind(i,j));
  	     xd.push_back(add_or(sor));
  	     query.push_back(add_and(xd));
      }
  	}

    add_or(query);
  	return;
  }
  if(min(n,m)!=1){
  	vector<int> query;
  	int a = 0, b = k; 
  	for(int u=0;u<max(N,M);u++){
      if(is_valid(a,b)){
      	vector<int> xd;
      	xd.push_back(get_ind(0,0));
      	xd.push_back(get_ind(a,b));
      	query.push_back(add_and(xd));
      }
      a++,b--;
  	}
  	add_or(query);
  	return;
  }
  if(n==1){
  	vector<int> query;
    for(int i=0;i+k<m;i++){
     vector<int> xd;
     xd.push_back(i);
     xd.push_back(i+k);
     query.push_back(add_and(xd));
    }
    add_or(query);
  }
  else{
    vector<int> query;
    for(int i=0;i+k<n;i++){
     vector<int> xd;
     xd.push_back(i);
     xd.push_back(i+k);
     query.push_back(add_and(xd));
    }
    add_or(query);
  }
}

Compilation message (stderr)

vision.cpp: In function 'void construct_network(int, int, int)':
vision.cpp:32:13: error: redeclaration of 'int a'
   32 |         int a = i, b = j - k;
      |             ^
vision.cpp:27:14: note: 'int a' previously declared here
   27 |          int a = i, b = j + k;
      |              ^
vision.cpp:32:20: error: redeclaration of 'int b'
   32 |         int a = i, b = j - k;
      |                    ^
vision.cpp:27:21: note: 'int b' previously declared here
   27 |          int a = i, b = j + k;
      |                     ^