[GESP202609 三级]分割字符串

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#include <cstdio>

static char buf[1024];
static char out_buf[2048];
int out_pos = 0;

inline void push_char(char c) {
    out_buf[out_pos++] = c;
}

inline void push_str(const char* s, int len) {
    for (int i = 0; i < len; ++i) {
        out_buf[out_pos++] = s[i];
    }
}

int main() {
    if (!fgets(buf, sizeof(buf), stdin)) return 0;
    
    int n = 0;
    while (buf[n] != '\0' && buf[n] != '\n' && buf[n] != '\r') {
        n++;
    }
    
    int pos = 0;
    int k = 1;
    
    while (pos < n) {
        int start = pos;
        bool found = false;
        
        while (pos <= n - k) {
            bool is_all_spaces = true;
            for (int j = 0; j < k; ++j) {
                if (buf[pos + j] != ' ') {
                    is_all_spaces = false;
                    break;
                }
            }
            
            if (is_all_spaces) {
                found = true;
                break;
            }
            pos++;
        }
        
        if (found) {
            if (pos > start) {
                push_str(buf + start, pos - start);
            }
            push_char('\n');
            pos += k;
            k++;
        } else {
            if (n > start) {
                push_str(buf + start, n - start);
            }
            push_char('\n');
            break;
        }
    }
    
    fwrite(out_buf, 1, out_pos, stdout);
    
    return 0;
}