Submission #480717

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
480717	2021-10-18 00:49:46	Mackerel_Pike	The Kingdom of JOIOI (JOI17_joioi)	C++14	100 / 100	628 ms	54936 KiB

joioi

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#include <bits/stdc++.h>
using namespace std;
const int maxn = 2005;
int n, m, mn, mx;
int a[maxn][maxn];
int l[maxn], r[maxn];
inline bool solve(int md){
  for(int i = 0; i < n; ++i){
    for(r[i] = -1; r[i] + 1 < m && a[i][r[i] + 1] >= mx - md; ++r[i]);
    for(l[i] = m; l[i] - 1 >= 0 && a[i][l[i] - 1] <= mn + md; --l[i]);
    --l[i];
    if(l[i] > r[i])
      return false;
  }
  int lst = -1; bool ok = true;
  for(int i = 0; i < n; ++i){
    lst = max(lst, l[i]);
    ok &= (lst <= r[i]);
  }
  if(ok)
    return true;
  lst = m;
  for(int i = 0; i < n; ++i){
    lst = min(lst, r[i]);
    if(lst < l[i])
      return false;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

joioi.cpp: In function 'int main()':
joioi.cpp:55:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   55 |     int md = lb + rb >> 1;
      |              ~~~^~~~
joioi.cpp:46:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |   scanf("%d%d", &n, &m);
      |   ~~~~~^~~~~~~~~~~~~~~~
joioi.cpp:51:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |       scanf("%d", &a[i][j]), mx = max(mx, a[i][j]), mn = min(mn, a[i][j]);
      |       ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 45 / 45
• Subtask 3: 40 / 40