#include <bits/stdc++.h>
#define pii pair<int,int>
#define iii pair<int,pii>
#define fi first
#define se second
#define vi vector<int>
#define all(x) x.begin(),x.end()
#define TEXT "a"
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
const int inf = 1e9 + 7;
const ld eps = 1e-8;
const double pi = acos(-1);
const int N = 2e6 + 5;
class ST{
private:
vector<int> add, rem;
public:
vector<int> val;
ST(int n){
add.resize(4 * n,-1);
rem.resize(4 * n,inf);
val.resize(n + 5,0);
}
void push(int id,int l,int r){
if (add[id] != -1){
if (l == r) val[l] = max(val[l],add[id]);
else{
add[id * 2] = max(add[id * 2],add[id]);
add[id * 2 + 1] = max(add[id * 2 + 1],add[id]);
}
}
if (rem[id] != inf){
if (l == r) val[l] = min(val[l],rem[id]);
else{
rem[id * 2] = min(rem[id * 2],rem[id]);
rem[id * 2 + 1] = min(rem[id * 2 + 1],rem[id]);
}
}
add[id] = -1;
rem[id] = inf;
}
void update(int id,int l,int r,int u,int v,int k,int f){
push(id,l,r);
if (l > v || r < u) return;
if (l >= u && r <= v){
if (f == 1) add[id] = k;
if (f == 2) rem[id] = k;
push(id,l,r);
return;
}
int mid = (l + r) / 2;
update(id * 2,l,mid,u,v,k,f);
update(id * 2 + 1,mid + 1,r,u,v,k,f);
}
};
void buildWall(int n,int k,int op[], int left[], int right[], int height[], int finalHeight[]){
ST t(n);
for (int i = 0; i < k; i++){
int l = left[i] + 1;
int r = right[i] + 1;
if (op[i] == 1) t.update(1,1,n,l,r,height[i],1);
if (op[i] == 2) t.update(1,1,n,l,r,height[i],2);
}
for (int i = 1; i <= n; i++){
finalHeight[i - 1] = t.val[i];
}
}
int main(){
cin.tie(0) -> sync_with_stdio(0);
if (fopen(TEXT".inp","r")){
freopen(TEXT".inp","r",stdin);
freopen(TEXT".out","w",stdout);
}
return 0;
}
Compilation message
wall.cpp: In function 'int main()':
wall.cpp:83:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
83 | freopen(TEXT".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
wall.cpp:84:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
84 | freopen(TEXT".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cczVwSnw.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc18QKsv.o:wall.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
