Submission #1248205

#	Time	Username	Problem	Language	Result	Execution time	Memory
1248205		bnd2100	Zemljište (COCI22_zemljiste)	C++20	0 / 70	1 ms	580 KiB

Main

/*
* @Author: Twynzz
* @Last Modified by: Twynzz
* @Note For This Problem: https://wbd.ms/share/v2/aHR0cHM6Ly93aGl0ZWJvYXJkLm1pY3Jvc29mdC5jb20vYXBpL3YxLjAvd2hpdGVib2FyZHMvcmVkZWVtLzIxYTA3NjI4Y2ZjOTRlYjRhYTRiYjVhZGE1Nzk3YmRkX0JCQTcxNzYyLTEyRTAtNDJFMS1CMzI0LTVCMTMxRjQyNEUzRF8zZTFhNWZlZC05N2RmLTQxNGYtODUyOS1kZDY4N2JhMDU3NTg=
*/


#include <bits/stdc++.h>
using namespace std;

// ------------ Define ------------

#define el "\n"
#define int long long
#define ld long double
#define str string
#define file(name) {freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
#define IOS {std::ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);}
#define _TBN_ signed main()
#define setp(n) setprecision(n)<< fixed
#define fi first
#define se second
#define ii pair<int,int>
#define gcd(a,b) __gcd(a,b)
#define tup pair<int,ii>
#define pb push_back
#define pf push_front
#define sz(v) (int)v.size()

const int maxn = 1e6+9;
const long long oo = 1e18;
const int MOD = 1e9+7, Mod = 998244353;
const int base = 311;

template<class X>
    bool maximize(X &a, const X &b)
    {
        if (a<b)
        {
            a = b;
            return 1;
        }
        return 0;
    }

template<class X>
    bool minimize(X &a, const X &b)
    {
        if (a>b)
        {
            a = b;
            return 1;
        }
        return 0;
    }

void sub1();
void sub2();
void sub3();

int lcm(int a, int b)
{
    return a/gcd(a,b)*b;
}

int sqr(int x) {return x*x;}

inline bool MASK(int mask, int bit) {return ((mask>>bit)&1);}
long long F(int n) {return n*(n+1)/2;}
inline int add(int a, int b, int m = MOD) {return ((a%m+b%m)%m+m)%m;}
inline int sub(int a, int b, int m = MOD) {return ((a-b)%m+m)%m;}
inline int mul(int a, int b, int m = MOD) {return ((a%m)*(b%m))%m;}

int dx[] = {-1,1,0,0};
int dy[] = {0,0,-1,1};

int n, m, a, b, c[509][509], pref[509][509];

int pre[509];
int f(int mid, int i)
{
    int S = pre[i] - pre[mid - 1];
    return abs(S - a) + abs(S - b);
}

_TBN_
{
    IOS;
    if (fopen("DAUTU.inp","r")) file("DAUTU");
    cin >>n >>m >>a >>b;
    for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= m; j++)
        {
            cin >>c[i][j];
            pref[i][j] = pref[i - 1][j] + c[i][j];
        }
    }
    for(int i = 1; i <= 1; i++)
    {
        if (n <= 70 && m <= 70) sub1();
        else sub2();
    }
    return 0;
}

int d[509];
void sub1()
{
    int mini = oo;
    for(int row1 = 1; row1 <= n; row1++)
    {
        for(int row2 = row1; row2 <= n; row2++)
        {
            for(int i = 1; i <= m; i++)
                d[i] = pref[row2][i] - pref[row1 - 1][i];
            for(int l = 1; l <= m; l++)
            {
                int sum = 0;
                for(int r = l; r <= n; r++)
                {
                    sum += d[r];
                    minimize(mini, abs(sum - a) + abs(sum - b));
                }
            }
        }
    }
    cout<< mini<< el;
}

void sub2()
{
    int mini = oo;
    for(int row1 = 1; row1 <= n; row1++)
    {
        for(int row2 = row1; row2 <= n; row2++)
        {
            for(int i = 1; i <= m; i++)
                d[i] = pref[row2][i] - pref[row1 - 1][i];
            for(int i = 1; i <= m; i++)
            {
                pre[i] = pre[i - 1] + d[i];
                int l = 1, r = i;
                int ans = -1;
                while(l <= r)
                {
                    int m1 = l + (r - l) / 3, m2 = r - (r - l) / 3;
                    if (f(m1, i) > f(m2, i))
                    {
                        ans = m1;
                        l = m1 + 1;
                    }
                    else
                    {
                        ans = m2;
                        r = m2 - 1;
                    }
                }
                if (ans == -1) continue;
                minimize(mini, f(ans, i));
            }
        }
    }
    cout<< mini<< el;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:17:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 | #define file(name) {freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:89:33: note: in expansion of macro 'file'
   89 |     if (fopen("DAUTU.inp","r")) file("DAUTU");
      |                                 ^~~~
Main.cpp:17:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 | #define file(name) {freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:89:33: note: in expansion of macro 'file'
   89 |     if (fopen("DAUTU.inp","r")) file("DAUTU");
      |                                 ^~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 40