Submission #496883

#	Time	Username	Problem	Language	Result	Execution time	Memory
496883		kingline	Maxcomp (info1cup18_maxcomp)	C++17	15 / 100	129 ms	460 KiB

maxcomp

/*#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")*/
#include <bits/stdc++.h>
#pragma GCC optimize ("unroll-loops,Ofast,O3")
#pragma GCC target("avx,avx2,fma")
//#define file(data) freopen(data".in", "r", stdin); freopen(data".out", "w", stdout);
#define pb push_back
//#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define all(data) data.begin() , data.end()
#define endl '\n'
//freopen("nenokku_easy.in", "r", stdin);
//freopen("nenokku_easy.out", "w", stdout);
//#define int long long
#define pii pair < int, int >
#define pll pair < long long, long long >

using namespace std;

const int N = 1e3 + 5;
const int lg = 21;

int n, m, a[N][N], ans = -1;

multiset < int > st;
void rec(int i, int j, int len) {
    if(i > n || j > m) return;
    ans = max(ans, (*st.rbegin()) - (*st.begin()) - len);
    st.insert(a[i + 1][j]);
    rec(i + 1, j, len + 1);
    st.erase(st.find(a[i + 1][j]));
    st.insert(a[i][j + 1]);
    rec(i, j + 1, len + 1);
    st.erase(st.find(a[i][j + 1]));
}

main() {
    //file("pieaters");
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            cin >> a[i][j];
        }
    }
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            st.insert(a[i][j]);
            rec(i, j, 1);
            st.erase(st.find(a[i][j]));
        }
    }
    cout << ans;
}

Compilation message (stderr)

maxcomp.cpp:39:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   39 | main() {
      | ^~~~

• Subtask 1: 0 / 15
• Subtask 2: 15 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40