제출 #315929

#제출 시각아이디문제언어결과실행 시간메모리
315929jjjFoehn Phenomena (JOI17_foehn_phenomena)C++14
30 / 100
1002 ms11640 KiB
#include <iostream> using namespace std; long long a[200010], b[200010]; int main() { int n, q; long long s, t, v = 0; cin >> n >> q >> s >> t; for(int i = 0; i <= n; i++) cin >> a[i]; for(int i = 1; i <= n; i++) b[i] = a[i] - a[i - 1]; for(int i = 1; i <= n; i++) { if(b[i] > 0) v -= s * b[i]; else v -= t * b[i]; } while(q--) { int l, r; long long x; cin >> l >> r >> x; if(b[l] > 0) v += s * b[l]; else v += t * b[l]; b[l] += x; if(b[l] > 0) v -= s * b[l]; else v -= t * b[l]; if(r != n) { if(b[r + 1] > 0) v += s * b[r + 1]; else v += t * b[r + 1]; b[r + 1] -= x; if(b[r + 1] > 0) v -= s * b[r + 1]; else v -= t * b[r + 1]; } cout << v << "\n"; } return 0; }
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