I was solving a question on Leetcode(Next Permutation)
class Solution {
public:
void nextPermutation(vector<int>& nums) {
int i=nums.size()-2;
while(i>=0 && nums[i]>nums[i+1])
{
i--;
}
int j=nums.size()-1;
if(i>=0)
{
while(j>=0 && nums[j]<=nums[i]){
j--;
}
swap(nums[i],nums[j]);
}
reverse(nums.begin()+i+1,nums.end());
}
};
This is the only part i had to edit. And upon running it i'm getting the following error
Line 1034: Char 34: runtime error: addition of unsigned offset to 0x602000000470 overflowed to 0x60200000046c (stl_vector.h)
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_vector.h:1043:34
If nums = [1,1,1], the following code will be excute:
while(j>=0 && nums[j]<=nums[i]){
j--;
}
until j=-1, and the following code causes vector overflowed:
swap(nums[i],nums[j]);
and then this error message of yours appears.
Related
I've created an array of structs but I'm getting the error written on the title of this question. I'm still new to this so I was wondering if I could get some help.
Code:
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
lcd.begin(16, 2);
i = 0;
}
#define LIMIT 27
struct protocol {
char create[16];
char character;
int values;
int minimum;
int maximum;
};
struct protocol channels[LIMIT];
int i;
void create_channels() {
if (Serial.available() > 0) {
Serial.print("Enter the channel description");
channels[i].create = Serial.read();
Serial.print("Enter the starting character: ");
channels[i].character = Serial.read();
if (i == LIMIT) {
for (i = 0; i < LIMIT; i++)
{
Serial.println(channels[i].create);
Serial.println(channels[i].character);
}
i = 0;
}
}
}
Error:
cw.ino:24:38: error: incompatible types in assignment of 'int' to 'char [16]'
channels[i].create = Serial.read();
class Solution {
public:
static bool nonDec(vector<int> a, vector<int> b){
return ((a[0]*a[1])>(b[0]*b[1]));
};
int maxHeight(vector<vector<int>>& cuboids) {
int n=cuboids.size();
int rotLength=3*n;
vector<vector<int>> rot(rotLength);
//rot 0->length//1->width//2->height
int index=0;
for(int i=0;i<n;i++){
rot[index][2]=cuboids[i][2];
rot[index][0]=cuboids[i][0];
rot[index][1]=cuboids[i][1];
index++;
rot[index][2]=cuboids[i][0];
rot[index][1]=max(cuboids[i][1],cuboids[i][2]);
rot[index][1]=min(cuboids[i][1],cuboids[i][2]);
index++;
rot[index][2]=cuboids[i][1];
rot[index][1]=max(cuboids[i][0],cuboids[i][2]);
rot[index][1]=min(cuboids[i][0],cuboids[i][2]);
index++;
}
n=3*n;
sort(rot.begin(),rot.end(),nonDec);
vector<int> msh;
for(int i=0;i<n;i++){ msh[i]=rot[i][2];}
for(int i=1;i<n;i++){
for(int j=0;j<i;j++){
if(rot[i][1]<=rot[j][1] && rot[i][0]<=rot[j][0] && rot[i][2]<=rot[j][2] && msh[i]<msh[j]+rot[i][2]){
msh[i]=msh[j]+rot[i][2];
}
}
}
int maxValue=0;
for(int i=0;i<n;i++){
if(msh[i]>maxValue){
maxValue=msh[i];
}
}
return maxValue;
}
};
Link to problem: https://leetcode.com/problems/maximum-height-by-stacking-cuboids/
Error : Line 1034: Char 34: runtime error: applying non-zero offset 8 to null pointer (stl_vector.h)
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_vector.h:1043:34
I was solving a question named as. Find First and Last Position of Element in Sorted Array
'''
void bin_search(vector<int>&nums,int target,int l,int h,int &a,int &b)
{
if(l>h)
return;
int mid= l + (h - l) / 2;
if(nums[mid]==target)
{
if(nums[mid-1]==target)
{
bin_search(nums,target,l,mid-1,a,b);
}
else
{
a=mid;
}
if(nums[mid+1]==target)
{
bin_search(nums,target,mid+1,h,a,b);
}
else
{
b=mid;
}
}
else if(nums[mid]<target)
{
bin_search(nums,target,mid+1,h,a,b);
}
else
{
bin_search(nums,target,l,mid-1,a,b);
}
}
class Solution {
public:
vector<int> searchRange(vector<int>& nums, int target) {
int a=-1;
int b=-1;
int l=0;
int h=nums.size()-1;
bin_search(nums,target,l,h,a,b);
return {a,b};
}
};
'''
this is the code which i submitted but i am getting
Line 1034: Char 34: runtime error: addition of unsigned offset to 0x602000000390 overflowed to 0x60200000038c (stl_vector.h)
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_vector.h:1043:34
error i am able to pass all the test cases in my complier and other id but didn't able to solve this bug
please help me thanks in advance
Following is the implementation of infix to postfix conversion, it is working fine on my computer, but as I am submitting in on SPOJ it is giving me Runtime error SIGSEGV, I am new to competitive programming and I am unable to handle such type of errors.
#include <iostream>
#include <stack>
#include<string.h>
#include<ctype.h>
using namespace std;
int prec(char ch){
switch(ch){
case '^' : return 3;
break;
case '*':
case '/': return 2;
break;
case '+':
case '-': return 1;
break;
default: return -1;
}
}
void pti(char a[]){
stack<int> post;
int k = -1;
for(int i = 0;i<strlen(a);i++){
if(isalnum(a[i]))
a[++k] = a[i];
else if(a[i] == '(')
post.push(a[i]);
else if(a[i] == ')'){
while(!post.empty() && post.top()!= '('){
a[++k] = post.top();
post.pop();
}
post.pop();
}
else {
while(!post.empty() && prec(a[i]) <= prec(post.top())){
a[++k] = post.top();
post.pop();
}
post.push(a[i]);
}
}
while(!post.empty()){
a[++k] = post.top();
post.pop();
}
a[++k] = '\0';
cout<<a<<endl;
}
int main()
{
int t;
cin>>t;
for(int i = 0;i<t;i++){
char a[100];
cin>>a;
pti(a);
}
}
You just need to make the input array longer, e.g. a size of 1000 gets AC.
The SIGSEGV signal means a segmentation fault occured, which basically means you accessed memory that doesn't belong to you.
I am getting a compilation error each time I try to compile this code snippet. The error is "illegal start of type" and occurs at "for(int i=0;i
class hello
{
int a[]={3,4,2,7,4,9,1,4,6,3};
int n=a.length;
for(int i=0;i<n;i++)
{
for(int j=i;j<n-i-1;j++)
{ //Ascending Order
if(a[j-1]>a[j])
{
int temp=a[j];
a[j]=a[j-1];
a[j-1]=temp;
}
}
}
for(int i=0;i<n;i++)
System.out.println(a[i]);
}
I realized the error. I forgot to make a main method.