This commit is contained in:
Michael Barre 2017-03-11 03:19:51 -06:00
commit 6901af9104
4 changed files with 47 additions and 2 deletions

View file

@ -1 +1 @@
What is this file saying? Help me. My friend sent me this file and told me to git gud.

View file

@ -0,0 +1,39 @@
//compile with:
//gcc -m32 -std=c99 -Wall -fno-stack-protector doubly_dangerous.c -o doubly_dangerous
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
void give_flag() {
FILE *f = fopen("flag.txt", "r");
if (f != NULL) {
char c;
while ((c = fgetc(f)) != EOF) {
putchar(c);
}
fclose(f);
}
else {
printf("Failed to open flag file!\n");
}
}
int main(int argc, char **argv){
volatile float modified;
char buffer[64];
modified = 0;
printf("Give me a string: \n");
gets(buffer);
if (modified == 11.28125) {
printf("Success! Here is your flag:\n");
give_flag();
}
else {
printf("nope!\n");
}
}

View file

@ -1,3 +1,9 @@
# Very easy problem. Compute a few values w/ brute force or something, then check OEIS.
# Part of: https://oeis.org/A001333
# Tells us: f(n) = (1/4) * Trace( [[0,0,1,0],[0,1,0,1],[1,0,2,0],[0,2,0,1]] )
# just write a program to compute this quickly
# this sol takes something like ~O(log n) i think?
x = input() + 1 x = input() + 1
mat = [[0,0,1,0],[0,1,0,1],[1,0,2,0],[0,2,0,1]] mat = [[0,0,1,0],[0,1,0,1],[1,0,2,0],[0,2,0,1]]

View file

@ -3,7 +3,7 @@ title: library
category: Programming category: Programming
autogen: false autogen: false
programming: true programming: true
value: 75 value: 175
test_cases: 10 test_cases: 10
time_limit: 1000 time_limit: 1000