#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
#define complete_unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define all(a) a.begin(),a.end()
#define println printf("\n");
#define readln(x) getline(cin,x);
#define pb push_back
#define endl "\n"
#define INT_INF 0x3f3f3f3f
#define LL_INF 0x3f3f3f3f3f3f3f3f
#define MOD 1000000007
#define MOD2 1494318097
#define SEED 131
#define mp make_pair
#define fastio cin.tie(0); cin.sync_with_stdio(0);
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef unordered_map<int,int> umii;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef pair<int,pii> triple;
typedef int8_t byte;
mt19937 g1(time(0));
int randint(int a, int b){return uniform_int_distribution<int>(a, b)(g1);}
ll randlong(ll a,ll b){return uniform_int_distribution<long long>(a, b)(g1);}
ll gcd(ll a, ll b){return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a, ll b){return a*b/gcd(a,b);}
ll fpow(ll b, ll exp, ll mod){if(exp == 0) return 1;ll t = fpow(b,exp/2,mod);if(exp&1) return t*t%mod*b%mod;return t*t%mod;}
ll divmod(ll i, ll j, ll mod){i%=mod,j%=mod;return i*fpow(j,mod-2,mod)%mod;}
int sx,sy,tx,ty,d;
vector<pii> res;
int main(){
scanf("%d %d %d %d %d",&sx,&sy,&tx,&ty,&d);
if(abs(sx-tx)+abs(sy-ty) > d) return 0*printf("impossible\n");
if((abs(sx-tx)+abs(sy-ty))%2 != d%2) return 0*printf("impossible\n");
int rem = d-abs(sx-tx)-abs(sy-ty);
if(rem > 10000) return 0*printf("impossible\n");
if(abs(sx-tx)+abs(sy-ty) == 1){
if(d != 1) return 0*printf("impossible\n");
return 0*printf("0\n");
}
if(sx == tx){
for(int i=sx-rem/2; i<=sx+rem/2; i++)
res.pb(mp(i,sy+(sy>ty?-1:1)));
}else if(sy == ty){
for(int i=sy-rem/2; i<=sy+rem/2; i++)
res.pb(mp(sx+(sx>tx?-1:1),i));
}else if(sx < tx){
if(sy < ty){
for(int i=0; i<rem/2; i++){
res.pb(mp(sx-i,sy+1));
res.pb(mp(sx+1,sy-i));
}
}else{
for(int i=0; i<rem/2; i++){
res.pb(mp(sx-1,sy-i));
res.pb(mp(sx+i,sy+1));
}
}
}else{
if(sy < ty){
for(int i=0; i<rem/2; i++){
res.pb(mp(sx-i,sy-1));
res.pb(mp(sx+1,sy+i));
}
}else{
for(int i=0; i<rem/2; i++){
res.pb(mp(sx-1,sy+i));
res.pb(mp(sx-i,sy-1));
}
}
}
printf("%d\n",(int)res.size());
for(pii check:res)
printf("%d %d\n",check.first,check.second);
}
Compilation message
towerdefense.cpp: In function 'int main()':
towerdefense.cpp:49:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d %d %d",&sx,&sy,&tx,&ty,&d);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
256 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
376 KB |
Distance from entrance to home is not d. |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
256 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
256 KB |
Output is correct |
| 4 |
Correct |
2 ms |
256 KB |
Output is correct |
| 5 |
Correct |
2 ms |
256 KB |
Output is correct |
| 6 |
Correct |
2 ms |
256 KB |
Output is correct |
| 7 |
Correct |
2 ms |
256 KB |
Output is correct |
| 8 |
Correct |
2 ms |
256 KB |
Output is correct |
| 9 |
Correct |
2 ms |
256 KB |
Output is correct |
| 10 |
Correct |
2 ms |
380 KB |
Output is correct |
| 11 |
Correct |
2 ms |
380 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
256 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Incorrect |
2 ms |
376 KB |
Distance from entrance to home is not d. |
| 16 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
256 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
376 KB |
Distance from entrance to home is not d. |
| 3 |
Halted |
0 ms |
0 KB |
- |
