// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.1,sse4.2,popcnt,abm,mmx,avx")
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <unordered_map>
#include <set>
#include <map>
#include <queue>
#include <random>
#include <chrono>
#define fi first
#define se second
#define pb push_back
#define ll long long
#define ld long double
#define hm unordered_map
#define pii pair<int, int>
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define cinv(v) for (auto& x: v) cin >> x
#define fr(i, n) for (int i = 0; i < n; ++i)
#define fl(i, l, n) for (int i = l; i < n; ++i)
// #define int ll
template <typename T1, typename T2> inline bool chkmin(T1 &x, const T2 &y) {if (x > y) {x = y; return 1;} return 0;}
template <typename T1, typename T2> inline bool chkmax(T1 &x, const T2 &y) {if (x < y) {x = y; return 1;} return 0;}
using namespace std;
#ifdef LOCAL
#define dbg(x) cerr << #x << " : " << x << '\n'
#else
#define dbg(x)
#endif
//tg: @runningcherry
template <typename T1, typename T2> ostream& operator << (ostream& out, const pair<T1, T2>& v) {
out << v.fi << ", " << v.se;
return out;
}
template<typename T> ostream& operator << (ostream& out, const vector<T>& v) {
for (auto& x: v) out << x << " ";
return out;
}
template <typename T1, typename T2> istream& operator >> (istream& in, pair<T1, T2>& a) {
in >> a.fi >> a.se;
return in;
}
const ll inf = (ll) 2e9;
const ld pi = asin (1) * 2;
const ld eps = 1e-8;
const ll mod = (ll)1e9 + 7;
const ll ns = 97;
const int maxn = 2000 + 20;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
int goo[maxn][maxn], n, m, mxp[maxn][maxn], mnp[maxn][maxn], mxs[maxn][maxn], mns[maxn][maxn];
inline int check (int x) {
dbg (x);
int j = m - 1;
fr (i, n) {
while (mxp[i][j] - mnp[i][j] > x) --j;
if (mxs[i][j + 1] - mns[i][j + 1] > x) return 0;
dbg (i);
dbg (j);
dbg (mxp[i][j] - mnp[i][j]);
dbg (mxp[i][j]);
dbg (mnp[i][j]);
}
return 1;
}
int bs () {
int l = -1, r = 1e9;
while (r - l > 1) {
int m = (r + l) >> 1;
if (check (m)) r = m;
else l = m;
}
return r;
}
signed main () {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
cin >> n >> m;
fr (i, n) fr (j, m) cin >> goo[i][j];
fr (i, n) {
mnp[i][0] = mxp[i][0] = goo[i][0];
fl (j, 1, m) {
mnp[i][j] = min (mnp[i][j - 1], goo[i][j]);
mxp[i][j] = max (mxp[i][j - 1], goo[i][j]);
}
mns[i][m - 1] = mxs[i][m - 1] = goo[i][m - 1];
for (int j = m - 2; j >= 0; --j) {
mns[i][j] = min (mns[i][j + 1], goo[i][j]);
mxs[i][j] = max (mxs[i][j + 1], goo[i][j]);
}
}
cout << bs () << '\n';
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
492 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
492 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
492 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
