출저 : 정올 (http://www.jungol.co.kr/prog/Hanal/hanalView.php?qs_code=1370)


#include <stdio.h>

#define DEBUG  1


typedef struct {

    int requested_order;

    int start_hour;

    int end_hour;

}MEETING;


MEETING g_requested_meetings[501];

int     g_num_requested_meetings;

MEETING g_scheduled_meeting[501];


int  ScheduleMeetings();

void SortRequestedMeetings();

void PrintRequestedMeetings();


// input output

void SetInputFfromFile(char* fileName);

void PrintAnwserToFile(char* fileName, int i_last_meeting);


int main() {      

    

SetInputFfromFile("input.txt");    

PrintAnwserToFile("output.txt", ScheduleMeetings());

    

return 0;

}


void PrintRequestedMeetings() {

    int im;

    for (im = 1; im <= g_num_requested_meetings; im++){

        printf("%d %d %d\n", g_requested_meetings[im].requested_order,

                g_requested_meetings[im].start_hour,

g_requested_meetings[im].end_hour);

    }

}


// sorting by end_hour

void SortRequestedMeetings() {

    int i, j;

    MEETING temp;

int end_hour_i;

int end_hour_j;


    for (i = 1; i <= g_num_requested_meetings; i++) {

        for (j = i + 1; j <= g_num_requested_meetings; j++) {


end_hour_i = g_requested_meetings[i].end_hour;

end_hour_j = g_requested_meetings[j].end_hour;


if (end_hour_i > end_hour_j) {

                temp = g_requested_meetings[i];

                g_requested_meetings[i] = g_requested_meetings[j];

                g_requested_meetings[j] = temp;

            }

        }

    }

}



int ScheduleMeetings() {

MEETING last_meeting, new_meeting;

    int il, in;  // index of last_meeting, index of new_meeting    

    SortRequestedMeetings();


    if (DEBUG) PrintRequestedMeetings();

    il = 1;

    g_scheduled_meeting[il] = g_requested_meetings[il];


for (in = 2; in <= g_num_requested_meetings; in++) {

last_meeting = g_scheduled_meeting[il];

new_meeting  = g_requested_meetings[in];


if (DEBUG) {

printf("%d : %d\n", last_meeting.end_hour, new_meeting.end_hour);

        }


if (last_meeting.end_hour <= new_meeting.start_hour) {

g_scheduled_meeting[++il] = new_meeting;

}

}


return il;

}



void SetInputFfromFile(char* fileName) {

int i;


FILE *input = NULL;

input = fopen(fileName, "r");

if (input == NULL) {

fprintf(stderr, "file open error : %s\n", fileName);

return;

}


fscanf(input, "%d", &g_num_requested_meetings);

    for (i = 1; i <= g_num_requested_meetings; i++) {

        fscanf(input, "%d %d %d", 

&(g_requested_meetings[i].requested_order), 

&(g_requested_meetings[i].start_hour), 

&(g_requested_meetings[i].end_hour));

    }


fclose(input);

}


void PrintAnwserToFile(char* fileName, int i_last_meeting) {

int i;

FILE *output = NULL;

output = fopen("output.txt", "w");

if (output == NULL) {

fprintf(stderr, "file open error : %s\n", fileName);

return;

}


fprintf(output, "%d\n", i_last_meeting);

    for (i = 1; i <= i_last_meeting; i++) {

        fprintf(output, "%d ", (g_scheduled_meeting[i]).requested_order);

    }

    fprintf(output, "\n");


fclose(output);

}


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by danguria 2012.11.11 16:04