제출 #961196

#제출 시각아이디문제언어결과실행 시간메모리
961196_rain_Foehn Phenomena (JOI17_foehn_phenomena)C++14
100 / 100
386 ms23236 KiB
/** author : _RAIN_ **/ #include<bits/stdc++.h> using namespace std; using i64 = long long; using ui64 = unsigned long long; #define MASK(x) ((i64)(1) << (x)) #define BIT(mask , x) (((mask) >> (x)) & (1)) template<class T> bool maximize(T &a , T b) {if (a < b) return a = b , true; else return false;} template<class T> bool minimize(T &a , T b) {if (a > b) return a = b , true; else return false;} template<class T> T gcd(T x , T y) {while (y) swap(y , x %= y); return x;} template<class T> T lcm(T x , T y) {return (x * y) / gcd(x , y);} const int maxn = 2e5; int numhouse , q ; int a[maxn + 2]; i64 s , t; class interval { public: struct NODE { i64 lazy; i64 val; }; vector<NODE> seg; void init(int n) { seg.assign(n * 4 + 7 , {0 , 0}); } void build(int node , int l , int r , int a[]) { if (l == r) seg[node].val = a[l]; else { int m = l + r >> 1; build(node * 2 , l , m , a); build(node * 2 + 1 , m + 1 , r , a); seg[node].val = seg[node * 2].val + seg[node * 2 + 1].val; } return; } void pushdown(int node) { i64& t = seg[node].lazy; seg[node * 2].val += t; seg[node * 2].lazy += t; seg[node * 2 + 1].val += t; seg[node * 2 + 1].lazy += t; t = 0; return; } void update(int node , int l , int r , int u , int v , i64 k) { if (l > v || r < u) return; if (u <= l && r <= v) { seg[node].val += k; seg[node].lazy += k; return; } int m = l + r >> 1; pushdown(node); update(node * 2 , l , m , u , v , k); update(node * 2 + 1 , m + 1 , r , u , v , k); } i64 get(int node , int l , int r , int u , int v) { if (l > v || r < u) return 0; if (u <= l && r <= v) return seg[node].val; int m = l + r >> 1; pushdown(node); return get(node * 2 , l , m , u , v) + get(node * 2 + 1, m + 1 , r , u , v); } }; int32_t main(void) { cin.tie(nullptr)->sync_with_stdio(false); const string name = "main"; if (fopen((name + ".inp").c_str() , "r")) { (void)!freopen((name + ".inp").c_str() , "r" , stdin); (void)!freopen((name + ".out").c_str() , "w+", stdout); } cin >> numhouse >> q >> s >> t; interval seg; seg.init(numhouse); for (int i = 0; i <= numhouse; ++i) cin >> a[i]; seg.build(1 , 0 , numhouse , a); i64 answer = 0; for (int i = 1; i <= numhouse; ++i) { if (a[i] > a[i - 1]) answer -= s * (a[i] - a[i - 1]); if (a[i] <= a[i - 1]) answer += t * (a[i - 1] - a[i]); } auto cost = [&](int l , int r)->i64 { i64 x = seg.get(1 , 0 , numhouse , l , l); i64 y = seg.get(1 , 0 , numhouse , r , r); return (i64)(x >= y ? t : -s) * abs(x - y); }; while(q--) { int l , r , x; cin>>l>>r>>x; if (l > 0) answer-= cost(l - 1 , l); if (r < numhouse) answer-=cost(r , r + 1); seg.update(1 , 0 , numhouse , l , r , x); if (l > 0) answer+=cost(l - 1 , l); if (r < numhouse) answer+=cost(r , r + 1); cout<<answer<<'\n'; } }

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In member function 'void interval::build(int, int, int, int*)':
foehn_phenomena.cpp:45:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |                 int m = l + r >> 1;
      |                         ~~^~~
foehn_phenomena.cpp: In member function 'void interval::update(int, int, int, int, int, i64)':
foehn_phenomena.cpp:69:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   69 |             int m = l + r >> 1;
      |                     ~~^~~
foehn_phenomena.cpp: In member function 'i64 interval::get(int, int, int, int, int)':
foehn_phenomena.cpp:78:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   78 |             int m = l + r >> 1;
      |                     ~~^~~
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...