제출 #116644

#제출 시각아이디문제언어결과실행 시간메모리
116644roseanne_pcyFoehn Phenomena (JOI17_foehn_phenomena)C++14
100 / 100
203 ms13048 KiB
//I don't want a lot for Christmas #include <bits/stdc++.h> //#ifdef atom #else #endif using namespace std; typedef long long ll; typedef pair<int, int> ii; #define X first #define Y second #define vi vector<int> #define vvi vector< vi > #define vii vector< ii > #define mp make_pair #define pb push_back const int maxn = 2e5+5; ll ft[maxn]; int n; ll a[maxn]; void update(int x, int dx) { for(; x<= n; x+=x&(-x)) ft[x] += dx; } ll sum(int x) { ll res = 0; for(; x; x -= x&(-x)) res += ft[x]; return res; } ll ask(int a, int b) { return sum(a); } void add(int a, int b, int dx) { update(a, dx); update(b+1, -dx); } int main() { //#ifndef atom freopen(".in", "r", stdin); freopen(".out", "w", stdout); #endif int q, s, t; scanf("%d %d %d %d", &n, &q, &s, &t); for(int i = 0; i<= n; i++) scanf("%lld", a+i); ll now = 0; for(int i = 0; i+1<= n; i++) { int dx = abs(a[i]-a[i+1]); if(a[i]< a[i+1]) { now -= 1LL*s*dx; } else now += 1LL*t*dx; } for(int i = 1; i<= n; i++) { add(i, i, (int)a[i]); } while(q--) { //printf("%d\n", q); int L, R, x; scanf("%d %d %d", &L, &R, &x); ll aL = ask(L-1, L-1); ll aLp = ask(L, L); //printf("*%d %d\n", aL, aLp); ll dx = abs(aL-aLp); if(aL< aLp) now += 1LL*s*dx; else now -= 1LL*t*dx; aLp += x; dx = abs(aL-aLp); if(aL< aLp) now -= 1LL*s*dx; else now += 1LL*t*dx; //printf("temp %lld\n", now); if(R == n) { add(L, R, x); printf("%lld\n", now); continue; } aL = ask(R, R); aLp = ask(R+1, R+1); //printf("**%d %d\n", aL, aLp); dx = abs(aL-aLp); if(aL< aLp) now += 1LL*s*dx; else now -= 1LL*t*dx; aL += x; dx = abs(aL-aLp); if(aL< aLp) now -= 1LL*s*dx; else now += 1LL*t*dx; add(L, R, x); printf("%lld\n", now); } }

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:40:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int q, s, t; scanf("%d %d %d %d", &n, &q, &s, &t);
                  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:41:37: 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:59:27: 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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