Submission #57358

#	Time	Username	Problem	Language	Result	Execution time	Memory
57358		gabrielsimoes	Land of the Rainbow Gold (APIO17_rainbow)	C++17	Compilation error	0 ms	0 KiB

rainbow

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

const int MAXN = 200010;

int dr[] = {-1, 0, 1, 0};
int dc[] = {0, 1, 0, -1};

int R, C;
bitset<MAX> land[MAX];
int sum[3][MAXN];

// int color[3][MAXN], _color = 0;
// void dfs_1(int r, int c, int ar, int ac, int br, int bc) {
//     for (int d = 0; d < 4; d++) {
//         int nr = r + dr[d], nc = c + dc[d];
//         if (r >= ar && r <= br && c >= ac && c <= bc && land[nr][nc] && color[nr][nc] == 0) {
//             color[nr][nc] = color[r][c];
//             dfs_1(nr, nc, ar, ac, br, bc);
//         }
//     }
// }

void init(int _R, int _C, int sr, int sc, int M, char *S) {
    R = _R; C = _C;
    for (int r = 1; r <= R; r++)
        for (int c = 1; c <= C; c++)
            land[r][c] = true;

    land[sr][sc] = false;
    for (int i = 0; i < M; i++) {
        int d = 0;
        switch(S[i]) {
            case 'N': d = 0; break;
            case 'E': d = 1; break;
            case 'S': d = 2; break;
            case 'W': d = 3; break;
        }
        sr += dr[d];
        sc += dc[d];
        land[sr][sc] = false;
    }

    for (int r = 1; r <= R; r++) {
        for (int c = 1; c <= C; c++) {
            if (land[r][c+1]) {
                sum[r][c] = sum[r][c-1] + 1;
            } else {
                sum[r][c] = sum[r][c-1];
            }
        }
    }
}

int colour(int ar, int ac, int br, int bc) {
    int ret = 0;
    for (int r = ar; r <= br; r++) {
        ret += sum[r][bc] - sum[r][ac-1] + (land[r][bc] ? 0 : 1);
    }
}

Compilation message (stderr)

rainbow.cpp:11:8: error: 'MAX' was not declared in this scope
 bitset<MAX> land[MAX];
        ^~~
rainbow.cpp:11:8: note: suggested alternative: 'MAXN'
 bitset<MAX> land[MAX];
        ^~~
        MAXN
rainbow.cpp:11:11: error: template argument 1 is invalid
 bitset<MAX> land[MAX];
           ^
rainbow.cpp:11:18: error: 'MAX' was not declared in this scope
 bitset<MAX> land[MAX];
                  ^~~
rainbow.cpp:11:18: note: suggested alternative: 'MAXN'
 bitset<MAX> land[MAX];
                  ^~~
                  MAXN
rainbow.cpp: In function 'void init(int, int, int, int, int, char*)':
rainbow.cpp:29:13: error: 'land' was not declared in this scope
             land[r][c] = true;
             ^~~~
rainbow.cpp:29:13: note: suggested alternative: 'rand'
             land[r][c] = true;
             ^~~~
             rand
rainbow.cpp:31:5: error: 'land' was not declared in this scope
     land[sr][sc] = false;
     ^~~~
rainbow.cpp:31:5: note: suggested alternative: 'rand'
     land[sr][sc] = false;
     ^~~~
     rand
rainbow.cpp: In function 'int colour(int, int, int, int)':
rainbow.cpp:59:45: error: 'land' was not declared in this scope
         ret += sum[r][bc] - sum[r][ac-1] + (land[r][bc] ? 0 : 1);
                                             ^~~~
rainbow.cpp:59:45: note: suggested alternative: 'rand'
         ret += sum[r][bc] - sum[r][ac-1] + (land[r][bc] ? 0 : 1);
                                             ^~~~
                                             rand
rainbow.cpp:61:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^