Submission #197440

#	Time	Username	Problem	Language	Result	Execution time	Memory
197440		GSmerch	Maxcomp (info1cup18_maxcomp)	C++14	60 / 100	1084 ms	57268 KiB

maxcomp

#include <bits/stdc++.h>

typedef long long ll;
typedef long double ld;


using namespace std;

#define fi first
#define se second
#define sz(x) (x).size()
#define pll pair<ll,ll >
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define endln '\n'
#define cont continue

const ll MaxN = 1e3 + 100;
const ll LogN = 20;
ll Inf = 1e18;
const ll dx[4] = { 0,1,0,-1 };
const ll dy[4] = { 1,0,-1,0 };

bool used[MaxN][MaxN];
ll Mt[MaxN][MaxN];

struct el{
    ll x, y, a;
};
int main() {

#ifdef LOCAL
    ifstream cin("input.txt");
    ofstream cout("output.txt");
#else
    //ifstream cin("points.in");
    //ofstream cout("points.out");
#endif
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    ll N, M;
    cin>>N>>M;
    ll Mx = 0;
    set<ll > St;
    for(int i = 1;i<=N;i++){
        for(int j =1;j<=M;j++){
            cin>>Mt[i][j];
            used[i][j] = 1;
           St.insert(Mt[i][j]);
        }
    }
    queue<el > BFS;
    ll Ans = -Inf;
    for(ll x : St){
         for(int i = 1;i<=N;i++){
            for(int j =1;j<=M;j++){
                used[i][j] = 1;
                if(x == Mt[i][j]){
                    BFS.push({i,j,1});
                }
            }
        }
        while(sz(BFS)){
            el a = BFS.front();
            BFS.pop();
            Ans = max(Ans, x - Mt[a.x][a.y] - a.a);
            if(!used[a.x][a.y]) cont;
            used[a.x][a.y] = 0;
            for(int i =0;i<4;i++){
                if(used[a.x + dx[i]][a.y + dy[i]]){
                    BFS.push({a.x + dx[i], a.y + dy[i], a.a+1});
                }
            }
        }
    }
    cout<<Ans;





    return 0;
}

Compilation message (stderr)

maxcomp.cpp: In function 'int main()':
maxcomp.cpp:44:8: warning: unused variable 'Mx' [-Wunused-variable]
     ll Mx = 0;
        ^~

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