Submission #51454

#	Time	Username	Problem	Language	Result	Execution time	Memory
51454		FutymyClone	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	191 ms	7508 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;

long long n, q, s, t, d[200010], a[200010], del, l, r, T0 = 0;
int main() {
	scanf("%lld%lld%lld%lld", &n, &q, &s, &t);
	for(int i = 0; i <= n; i++) scanf("%lld", &a[i]);
	for(int i = 1; i <= n; i++) {
		d[i] = a[i] - a[i-1];
		T0 += (d[i] >= 0 ? -d[i] * s : -d[i] * t);
	}
	while(q--) {
		scanf("%lld%lld%lld", &l, &r, &del);
		long long T = 0; T0 -= (d[l] >= 0 ? -d[l] * s : -d[l] * t);
		d[l] += del;
		T0 += (d[l] >= 0 ? -d[l] * s : -d[l] * t);
		if(r < n) {
			T0 -= (d[r+1] >= 0 ? -d[r+1] * s : -d[r+1] * t);
			d[r+1] -= del;
			T0 += (d[r+1] >= 0 ? -d[r+1] * s : -d[r+1] * t);
		}
		printf("%lld\n", T0);
	}
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:14:13: warning: unused variable 'T' [-Wunused-variable]
   long long T = 0; T0 -= (d[l] >= 0 ? -d[l] * s : -d[l] * t);
             ^
foehn_phenomena.cpp:6:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld%lld%lld", &n, &q, &s, &t);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:7:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 0; i <= n; i++) scanf("%lld", &a[i]);
                              ~~~~~^~~~~~~~~~~~~~~
foehn_phenomena.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%lld", &l, &r, &del);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60