Submission #1108217

#	Time	Username	Problem	Language	Result	Execution time	Memory
1108217		whatthemomooofun1729	Art Class (IOI13_artclass)	C++17	71 / 100	57 ms	6992 KiB

artclass

#include <iostream>
#include <algorithm>
#include <utility>
#include <vector>
#include <stack>
#include <map>
#include <queue>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cstring>
#include <cmath>
#include <functional>
#include <cassert>
#include <iomanip>
#include <numeric>
#include <bitset>
#include <sstream>
#include <chrono>
#include <random>

#define ff first
#define ss second
#define PB push_back
#define sz(x) int(x.size())
#define rsz resize
#define fch(xxx, yyy) for (auto xxx : yyy) // abusive notation
#define all(x) (x).begin(),(x).end()
#define eps 1e-9

// more abusive notation (use at your own risk):
// #define int ll

using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
using vll = vector<ll>;

// debugging
void __print(int x) {std::cerr << x;}
void __print(ll x) {std::cerr << x;} /* remember to uncomment this when not using THE MACRO */
void __print(unsigned x) {std::cerr << x;}
void __print(ull x) {std::cerr << x;}
void __print(float x) {std::cerr << x;}
void __print(double x) {std::cerr << x;}
void __print(ld x) {std::cerr << x;}
void __print(char x) {std::cerr << '\'' << x << '\'';}
void __print(const char *x) {std::cerr << '\"' << x << '\"';}
void __print(const string& x) {std::cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V> void __print(const pair<T, V> &x) {std::cerr << '{'; __print(x.ff); std::cerr << ", "; __print(x.ss); std::cerr << '}';}
template<typename T> void __print(const T& x) {int f = 0; std::cerr << '{'; for (auto &i: x) std::cerr << (f++ ? ", " : ""), __print(i); std::cerr << "}";}
void _print() {std::cerr << "]\n";}
template <typename T, typename... V> void _print(T t, V... v) {__print(t); if (sizeof...(v)) std::cerr << ", "; _print(v...);}
void println() {std::cerr << ">--------------------<" << endl;}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

// templates
template <class T> bool ckmin(T &a, const T &b) {return b<a ? a = b, 1 : 0;}
template <class T> bool ckmax(T &a, const T &b) {return b>a ? a = b, 1 : 0;}
template <class T> using gr = greater<T>;
template <class T> using vc = vector<T>;
template <class T> using p_q = priority_queue<T>;
template <class T> using pqg = priority_queue<T, vc<T>, gr<T>>;
template <class T1, class T2> using pr = pair<T1, T2>;
mt19937_64 rng_ll(chrono::steady_clock::now().time_since_epoch().count());
int rng(int M) {return (int)(rng_ll()%M);} /*returns any random number in [0, M) */

// const variables
constexpr int INF = (int)2e9;
constexpr int MOD = 998244353;
constexpr long double EPS = (ld)1e-10, PI = 3.1415926535;
constexpr ll LL_INF = (ll)3e18;
constexpr int mod = (int)1e9 + 7;
constexpr ll inverse = 500000004LL; // inverse of 2 modulo 1e9 + 7

void setIO(const string& str) {// fast input/output
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (str.empty()) return;
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
}

#include "artclass.h"

int xDir[4] = { 0, 1, 0, -1};
int yDir[4] = { 1, 0, -1, 0};
int C = 1;
int vst[500][500];

int similar(int r1, int g1, int b1, int r2, int g2, int b2) {
    int dist = (r2 - r1) * (r2 - r1) + (g2 - g1) * (g2 - g1) + (b2 - b1) * (b2 - b1);
    return dist <= 900;
}

int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    double mr = 0.00, mg = 0.00, mb = 0.00;
    for (int i = 0; i < H; ++i) {
        for (int j = 0; j < W; ++j) {
            mr += R[i][j], mg += G[i][j], mb += B[i][j];
            if (vst[i][j] == 0) {
                queue<pii> q;
                q.push({i, j});
                while (!q.empty()) {
                    int x = q.front().ff, y = q.front().ss;
                    q.pop();
                    for (int k = 0; k < 4; ++k) {
                        int nx = x + xDir[k], ny = y + yDir[k];
                        if (nx < 0 || nx > H || ny < 0 || ny > W) continue;
                        if (vst[nx][ny] == 0 && similar(R[x][y], G[x][y], B[x][y], R[nx][ny], G[nx][ny], B[nx][ny])) {
                            vst[nx][ny] = C;
                            q.push({nx, ny});
                        }
                    }
                }
                C++;
            }
        }
    }
    C--;
    debug(C);
    if (C > 12000) return 3;
    else if (C > 2500) {
        if (C > 5000) return 2;
        mr/=(H * W);
        mg/=(H * W);
        mb/=(H * W);
        double stdev = 0.00;
        for (int i = 0; i < H; ++i) {
            for (int j = 0; j < W; ++j) {
                stdev += (R[i][j] - mr) * (R[i][j] - mr) + (G[i][j] - mg) * (G[i][j] - mg) + (B[i][j] - mb) * (B[i][j] - mb);
            }
        }
        stdev/=(H * W);
        debug(stdev);
        if (stdev > 10000) return 1;
        else return 2;
    }
    else if (C > 80) return 1;
    else return 4;
}
/*
int r[500][500], g[500][500], b[500][500];

signed main() { // TIME YOURSELF !!!
    setIO("");
    int h, w;
    cin >> h >> w;
    for (int i = 0; i < h; ++i) {
        for (int j = 0; j < w; ++j) {
            cin >> r[i][j] >> g[i][j] >> b[i][j];
        }
    }
    cout << style(h, w, r, g, b);
    return 0;
}*/

// TLE -> TRY NOT USING DEFINE INT LONG LONG
// CE -> CHECK LINE 45
// 5000 * 5000 size matrices are kinda big (potential mle)
// Do something, start simpler

Compilation message (stderr)

artclass.cpp: In function 'void setIO(const string&)':
artclass.cpp:89:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
artclass.cpp:90:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 71 / 100