注意n,m在这里的意思，打印的时候要颠倒n,m!!!

#include <iostream>
#include <cstring>

using namespace std;
const int N = 110;
int dx[4] = {0,1,0,-1};
int dy[4] = {1,0,-1,0};
char g[N][N];
int st[N][N];
int n,m,q;

void dfs(int x,int y,char u){
    g[x][y] = u;
    st[x][y] = 1;
    // cout << x << ' ' << y << ':' << endl;
    for(int i = 0;i < 4;i++){
        int tx = x + dx[i],ty = y + dy[i];
        // cout << tx << ' ' << ty << ' ' << g[tx][ty] << endl;
        if(tx >= 0 && tx < m && ty >= 0 && ty < n && !st[tx][ty]){
            if(g[tx][ty] == '-' || g[tx][ty] == '|' || g[tx][ty] == '+') continue;
            dfs(tx,ty,u);
        }
    }
}

int main(){
    cin >> m >> n >> q;
    for(int i = 0;i < m;i++)
        for(int j = 0;j < n;j++)
            g[i][j] = '.';

    while(q--){
        int op;
        cin >> op;
        if(!op){
            int x1,y1,x2,y2;
            cin >> x1 >> y1 >> x2 >> y2;
            if(x1 == x2){
                char x = '|';
                int ma_y = max(y1,y2),mi_y = min(y1,y2);
                for(int i = mi_y;i <= ma_y;i++){
                    if(g[x1][i] == '-' || g[x1][i] == '+') g[x1][i] = '+';
                    else g[x1][i] = x;
                }
            }
            else{
                char x = '-';
                int ma_x = max(x1,x2),mi_x = min(x1,x2);
                for(int i = mi_x;i <= ma_x;i++){
                    if(g[i][y1] == '|' || g[i][y1] == '+') g[i][y1] = '+';
                    else g[i][y1] = x;
                }
            }
        }else{
            char u;
            int x,y;
            cin >> x >> y >> u;
            memset(st,0,sizeof st);
            dfs(x,y,u);
        }
    }
    for(int i = n - 1;i >= 0;i--){
        for(int j = 0;j < m;j++){
            cout << g[j][i];
        }
        cout << endl;
    }
    return 0;
}