This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
struct node {
int lv, rv, lz;
ll v;
};
const int MAXN=2e5+3;
int v[MAXN];
node seg[MAXN*4];
int n, q, x, y;
void remerge(int sind, int e, int d) {
seg[sind].v=seg[e].v+seg[d].v;
ll val=seg[d].lv-seg[e].rv;
seg[sind].v+= val<0 ? -val*y : -val*x;
seg[sind].lv=seg[e].lv;
seg[sind].rv=seg[d].rv;
}
void build(int sind, int ini, int fim) {
if(ini==fim) {
seg[sind].rv=seg[sind].lv=v[ini];
seg[sind].lz=0;
return;
}
int mid=(ini+fim)/2;
int e=sind*2; int d=e+1;
build(e, ini, mid);
build(d, mid+1, fim);
remerge(sind, e, d);
}
void refresh(int sind, int ini, int fim) {
if(!seg[sind].lz) return;
seg[sind].lv+=seg[sind].lz;
seg[sind].rv+=seg[sind].lz;
if(ini==fim) {
seg[sind].lz=0;
return;
}
int e=sind*2; int d=e+1;
seg[e].lz+=seg[sind].lz;
seg[d].lz+=seg[sind].lz;
seg[sind].lz=0;
return;
}
void update(int sind, int ini, int fim, int qini, int qfim, int val) {
refresh(sind, ini, fim);
if(qfim<ini||qini>fim) return;
if(qini<=ini&&qfim>=fim) {
seg[sind].lz=val;
refresh(sind, ini, fim);
return;
}
int mid=(ini+fim)/2;
int e=sind*2; int d=e+1;
update(e, ini, mid, qini, qfim, val);
update(d, mid+1, fim, qini, qfim, val);
remerge(sind, e, d);
}
int main() {
scanf("%d %d %d %d", &n, &q, &x, &y); n++;
for(int i=1; i<=n; i++) scanf("%d", &v[i]);
build(1, 1, n);
while(q--) {
int ini, fim, val;
scanf("%d %d %d", &ini, &fim, &val);
update(1, 1, n, ini+1, fim+1, val);
printf("%lld\n", seg[1].v);
}
}
Compilation message (stderr)
foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d %d", &n, &q, &x, &y); n++;
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:68:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i=1; i<=n; i++) scanf("%d", &v[i]);
~~~~~^~~~~~~~~~~~~
foehn_phenomena.cpp:73:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d", &ini, &fim, &val);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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