ENG  RUSTimus Online Judge
Online Judge
Problems
Authors
Online contests
About Online Judge
Frequently asked questions
Site news
Webboard
Links
Problem set
Submit solution
Judge status
Guide
Register
Update your info
Authors ranklist
Current contest
Scheduled contests
Past contests
Rules
back to board

Discussion of Problem 1220. Stacks

Who can help me with WA#3 ?
Posted by Iosif inf-10 10 Feb 2013 18:10
#include <stdio.h>
#define MaxN 100000+252
#define MaxPop MaxN/2+1


struct pointer {
    int s;
    char o;
};

struct pointer GetPointer(int i)
{
    struct pointer p;
    p.s=i/250;
    p.o=i % 250;
    return p;

}

struct Stack {
    int V;
    struct pointer pred;
};
int GetAdress(struct pointer p) {
    return p.s*250+p.o;
}

int A[1001];
int MP;
struct Stack B[MaxN];


int Pop(int S)
{
    int E;
    E=B[A[S]].V;
    A[S]=GetAdress(B[A[S]].pred);
    return E;
}
int Push(int S, int E)
{
    int i=A[S];
    MP++;
    B[MP].V=E;
    B[MP].pred=GetPointer(i);
    A[S]=MP;
    return 0;
}
int main() {

    int N,i,j,E,k;
    int S;
    char command[10];
    scanf("%d",&N);


    MP=0;
    B[MP].V=0;
    B[MP].pred=GetPointer(0);
    for (i=1;i<1000;i++) A[i]=0;
    k=0;
    for (i=1;i<=N;i++) {

        scanf("%s",command);
        if (command[1] == 'U'){
            scanf("%d %d",&S,&E);
            Push(S,E);
        } else {
            scanf("%d",&S);
            k++;
            printf("%d\n",Pop(S));
        }
    }




    return 0;
}