Submission #22942

#	Time	Username	Problem	Language	Result	Execution time	Memory
22942		cprayer	Young Zebra (KRIII5_YZ)	C++14	0 / 7	156 ms	32708 KiB

YZ

#include <cstdio>
#include <vector>
#include <algorithm>

using namespace std;

const int MAXN = 409, MAXM = 409;
const int cx[] = {1, 0, -1 ,0}, cy[] = {0, 1, 0, -1};
char A[MAXN * 3][MAXN * 3];
int ans[MAXN * 3][MAXN * 3], visited[MAXN * 3][MAXN * 3];
bool visited2[MAXN * 3][MAXN * 3];
int N, M, cnt, inf;
vector<pair<int, int>> path;

int dfs1(int y, int x, char c){
    if(y >= N * 3) y = 0;
    if(y < 0) y = N * 3;
    if(x >= M * 3) x = 0;
    if(x < 0) x = M * 3;
    if(visited[y][x] || A[y][x] != c) return 0;
    int res = 1;
    visited[y][x] = cnt;
    for(int i = 0; i < 4; i++) res += dfs1(y + cy[i], x + cx[i], c);
    return res;
}

void dfs2(int y, int x, char c){
    if(y >= N * 3) y = 0;
    if(y < 0) y = N * 3;
    if(x >= M * 3) x = 0;
    if(x < 0) x = M * 3;
    if(A[y][x] != c) return;
    if(visited2[y][x]){
        if((y / N != 1 || x / M != 1) && (visited[y][x] == visited[N + y % N][M + x % M])) inf = true;
        return;
    }
    path.push_back({y, x});
    visited2[y][x] = true;
    for(int i = 0; i < 4; i++) dfs2(y + cy[i], x + cx[i], c);
}

int main(){
    scanf("%d%d%*c", &N, &M);
    for(int i = 0; i < N; i++){
        scanf("%s", A[i]);
        for(int j = 0; j < M; j++){
            for(int v = 0; v < 3; v++){
                for(int w = 0; w < 3; w++) A[v * N + i][w * M + j] = A[i][j];
            }
        }
    }
    for(int i = 0; i < N; i++){
        for(int j = 0; j < M; j++){
            int y = i + N, x = j + M;
            if(!visited[y][x]){
                inf = 0;
                cnt++;
                int v = dfs1(y, x, A[y][x]);
                dfs2(y, x, A[y][x]);
                if(inf) v = -1;
                for(auto l : path) ans[l.first][l.second] = v;
                path.clear();
            }
        }
    }
    for(int i = 0; i < N; i++){
        for(int j = 0; j < M; j++) printf("%d ", ans[i + N][j + M]);
        printf("\n");
    }
}

Compilation message (stderr)

YZ.cpp: In function 'int main()':
YZ.cpp:43:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%*c", &N, &M);
                             ^
YZ.cpp:45:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", A[i]);
                          ^

• Subtask 1: 0 / 7