제출 #33259

#제출 시각아이디문제언어결과실행 시간메모리
33259minkankFoehn Phenomena (JOI17_foehn_phenomena)C++14
100 / 100
243 ms3576 KiB
#include <bits/stdc++.h> using namespace std; const int N = 2e5 + 5; int n, m, s, t; long long ans = 0, a[N]; int main() { scanf("%d %d %d %d", &n, &m, &t, &s); for(int i = 0; i <= n; ++i) scanf("%lld", &a[i]); for(int i = n; i >= 1; --i) { a[i] -= a[i - 1]; if(a[i] > 0) ans -= a[i] * t; else ans += -a[i] * s; } for(int i = 0; i < m; ++i) { int l, r, x; scanf("%d %d %d", &l, &r, &x); if(a[l] > 0) ans += a[l] * t; else ans -= -a[l] * s; a[l] += x; if(a[l] > 0) ans -= a[l] * t; else ans += -a[l] * s; if(r != n) { if(a[r + 1] > 0) ans += a[r + 1] * t; else ans -= -a[r + 1] * s; a[r + 1] -= x; if(a[r + 1] > 0) ans -= a[r + 1] * t; else ans += -a[r + 1] * s; } cout << ans << '\n'; } }

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:10:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d %d", &n, &m, &t, &s);
                                      ^
foehn_phenomena.cpp:11:50: 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:18:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int l, r, x; scanf("%d %d %d", &l, &r, &x);
                                             ^
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