Submission #1117120

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117120		gustavo_d	Land of the Rainbow Gold (APIO17_rainbow)	C++17	0 / 100	12 ms	608 KiB

rainbow

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

map<char, pair<int, int>> ds;
pair<int, int> moves[4] = {
    {0, -1},
    {0, 1},
    {1, 0},
    {-1, 0},
};

bool mark[51][51];
bool mark2[3][200001];

int x, y;

vector<pair<int, int>> r1, r2, r12;
void init(int R, int C, int sr, int sc, int M, char *S) {
    x=R; y=C;
    ds['N'] = {-1, 0};
    ds['S'] = {1, 0};
    ds['E'] = {0, 1};
    ds['W'] = {0, -1};
    if (R == 2) {
        mark2[sr][sc] = true;
        // cout << sr << ' ' << sc << endl;
        for (int i=0; i<M; i++) {
            char c = S[i];
            sr += ds[c].first;
            sc += ds[c].second;
            mark2[sr][sc] = true;
            // cout << sr << ' ' << sc << endl;
        }
        pair<int, int> rng = {-1, -1};
        for (int i=1; i<=C; i++) {
            if (mark2[1][i]) {
                if (rng.first != -1) {
                    r1.push_back(rng);
                }
                rng = {-1, -1};
            } else {
                if (rng.first == -1) rng = {i, i};
                else rng.second++;
            }
        }
        if (rng.first != -1) {
            r1.push_back(rng);
        }

        rng = {-1, -1};
        for (int i=1; i<=C; i++) {
            if (mark2[2][i]) {
                if (rng.first != -1) {
                    r2.push_back(rng);
                }
                rng = {-1, -1};
            } else {
                if (rng.first == -1) rng = {i, i};
                else rng.second++;
            }
        }
        if (rng.first != -1) {
            r2.push_back(rng);
        }

        rng = {-1, -1};
        for (int i=1; i<=C; i++) {
            if (!mark2[1][i] and !mark2[2][i]) {
                if (rng.first != -1) {
                    r12.push_back(rng);
                }
                rng = {-1, -1};
            } else {
                if (rng.first == -1) rng = {i, i};
                else rng.second++;
            }
        }
        if (rng.first != -1) {
            r12.push_back(rng);
        }
        return;
    }
    for (int i=0; i<=50; i++) mark[i][0] = true;
    for (int i=0; i<=50; i++) mark[0][i] = true;
    mark[sr][sc] = true;
    // cout << sr << ' ' << sc << endl;
    for (int i=0; i<M; i++) {
        char c = S[i];
        sr += ds[c].first;
        sc += ds[c].second;
        mark[sr][sc] = true;
        // cout << sr << ' ' << sc << endl;
    }
}

bool tmp[51][51];
int lar, lac, lbr, lbc;
void dfs(int i, int j) {
    if (i < lar or j < lac or i > lbr or j > lbc or tmp[i][j]) return;
    tmp[i][j] = true;
    for (pair<int, int> d : moves) {
        dfs(i + d.first, j + d.second);
    }
}

int solve(vector<pair<int, int>> &rngs, int l, int r) {
    auto fi = lower_bound(rngs.begin(), rngs.end(), make_pair(l, 0));
    if (fi != rngs.begin()) {
        fi--;
        if ((fi->second) < l) fi++;
    }
    if (fi == rngs.end()) return 0;
    auto last = upper_bound(rngs.begin(), rngs.end(), make_pair(l, (int)1e9));
    if (last == rngs.begin()) return 0;
    last--;
    return distance(fi, last) + 1;
}

int colour(int ar, int ac, int br, int bc) {
    if (x == 2) {
        if (ar == 1 and br == 1) {
            return solve(r1, ac, bc);
        }
        if (ar == 2 and br == 2) {
            return solve(r2, ac, bc);
        }
        if (ar == 1 and br == 2) {
            return solve(r12, ac, bc);
        }
    }

    lar = ar; lac = ac; lbr = br; lbc = bc;
    int cnt = 0;

    for (int i=1; i<=50; i++) {
        for (int j=1; j<=50; j++) {
            tmp[i][j] = mark[i][j];
        }
    }
    for (int r=ar; r<=br; r++) {
        for (int c=ac; c<=bc; c++) {
            if (!tmp[r][c]) {
                cnt++;
                dfs(r, c);
            }
        }
    }
    return cnt;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 12
• Subtask 3: 0 / 24
• Subtask 4: 0 / 27
• Subtask 5: 0 / 26