Qualification Round Africa 2010 Problem A. Store Credit

/*Qualification Round Africa 2010Problem A. Store Credit*/#include<stdio.h>const char FILE_NAME[] = "A-large-practice.in";const char OUT_FILE_NAME[] = "A-large-practice.out";#define NEXTLINEfgets(line,sizeof(line),readfp)#defineHELLOprintf("hello\n")#include<stdlib.h>#include<string.h>void preread_file(){int count_line = 0, i;int line_num;char line[8000];FILE *readfp = fopen(FILE_NAME,"r");if (readfp == NULL){printf("Cannot open %s\n", FILE_NAME);exit(8);}NEXTLINE; ++count_line;line_num = atoi(line);while (NEXTLINE)++count_line;if (line_num*3!=(count_line-1)){printf("line number = %d\tcount line = %d\n",line_num,count_line);printf("Number of credits fails to match.\n");exit(8);}fclose(readfp);}int main(){int NUMBER,CREDIT,ITEMS,PRICES[2000];int i,j=0,k,position=0;char line[9000]; char* token;FILE *readfp = fopen(FILE_NAME,"r");FILE *writefp = fopen(OUT_FILE_NAME,"w");//HELLO;preread_file();NEXTLINE;position++;NUMBER = atoi(line);HELLO;for (i = 0; i<NUMBER; j = 0, i++){memset(PRICES,0,sizeof(PRICES));NEXTLINE;position++;CREDIT = atoi(line);printf("CASE %d CREDIT %d\n",i+1,CREDIT);NEXTLINE;position++;ITEMS = atoi(line);printf("CASE %d ITEMS %d\n",i+1,ITEMS);NEXTLINE;position++;token = strtok(line, " ");while (token){PRICES[j]=atoi(token);token = strtok(NULL, " ");//printf("CASE #%d,ITEMS %d\t%d\t%d\n",i+1,ITEMS,j+1,PRICES[j]);//fprintf(writefp,"CASE #%d,ITEMS=%d PRICES[%d]=%d\n",i+1,ITEMS,j+1,PRICES[j]);j++;}//fprintf(writefp,"mark:case=%d,ITEMS=%d\n",i+1,ITEMS);//MARK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!if (j!=ITEMS){printf("error here\n");printf("ITEMS fail to match the actual number at line %d.j=%d,ITEMS=%d\n",position,j,ITEMS);exit(8);}else//fprintf(writefp,"ITEMS matches the actual number at line %d.j=%d,ITEMS=%d\n",position,j,ITEMS);for (j=0;j<ITEMS-1;j++)for (k=j+1;k<ITEMS;k++)if (PRICES[j]+PRICES[k] == CREDIT){fprintf(writefp,"Case #%d: %d %d\n",i+1,j+1,k+1);//printf("Case #%d: %d %d\n",i+1,j+1,k+1);break;}}fclose(writefp);printf("out file finished.\n");return 0;}

Back to programming.

This is a Google Code Jam problem.

A good start. although I am still not sure about whether I will be a coding monkey.