#include <bits/stdc++.h>
using namespace std;
#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
#define FF first
#define SS second
#define pb push_back
#define sz(x) (int)x.size()
//#define oo 2e18
#define eps 1e-9
#define PI acos(-1.0)
#define lb lower_bound
#define ub upper_bound
#define all(a) (a).begin(), (a).end()
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> ii;
typedef pair<int, ii> i3;
const int N = 2e5+7, M=448;
const int MOD = 1e9+7;
const int oo=1e9+1;
int n, m, k, t;
struct Node{
ll ans; int l, r;
Node() {ans=l=r=0;}
Node(int v) {l=r=v, ans=abs(v);}
bool sameType(int a, int b) {
if((a<0&&b>0)||(a>0&&b<0)) return 0;
return 1;
}
Node operator+(const Node &a) {
Node b; b.l=l, b.r=a.r, b.ans=ans+a.ans;
if(!sameType(r, a.l)) b.ans-=min(abs(r), abs(a.l));
return b;
}
} st[N<<2];
void update(int idx, int l0, int r0, int p, int v) {
if(l0>p||r0<p) return;
if(l0==r0&&l0==p) {
st[idx].l+=v, st[idx].r+=v, st[idx].ans=abs(st[idx].l);
return;
}
int mid=(l0+r0)/2;
update(idx*2, l0, mid, p, v), update(idx*2+1, mid+1, r0, p, v);
st[idx]=st[idx*2]+st[idx*2+1];
}
Node get(int idx, int l0, int r0, int l, int r) {
if(l0>r||r0<l) return Node(0);
if(l<=l0&&r0<=r) return st[idx];
int mid=(l0+r0)/2;
return get(idx*2, l0, mid, l, r)+get(idx*2+1, mid+1, r0, l, r);
}
void upd(int p, int v) {update(1, 1, n, p, v);}
ll qry() {return get(1, 1, n, 1, n).ans;}
signed main() {
//freopen("test.inp", "r", stdin);
//freopen("test.out", "w", stdout);
//fastIO;
scanf("%d%d", &n, &m);
int x, y;
for(int i=1;i<=n;i++) {
scanf("%d", &y);
if(i>1) upd(i, y-x);
x=y;
}
for(int i=1;i<=m;i++) {
scanf("%d%d%d", &x, &y, &k);
if(x!=1) upd(x, k);
if(y!=n) upd(y+1, -k);
printf("%lld\n", qry());
}
return 0;
}
/* stuff you should look for
- int overflow, array bounds
- special cases (n=1?)
- do smth instead of do nothing and stay organized
- WRITE STUFF DOWN
- DONT JUST STICK ON ONE APPROACH
*/
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:62:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
62 | scanf("%d%d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:65:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
65 | scanf("%d", &y);
| ~~~~~^~~~~~~~~~
Main.cpp:70:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
70 | scanf("%d%d%d", &x, &y, &k);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
10 ms |
12748 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
10 ms |
12748 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
10 ms |
12748 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
