Submission #398704

#	Time	Username	Problem	Language	Result	Execution time	Memory
398704		duality	Foehn Phenomena (JOI17_foehn_phenomena)	C++11	100 / 100	143 ms	11456 KiB

foehn_phenomena

#define DEBUG 0

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

#if DEBUG
// basic debugging macros
int __i__,__j__;
#define printLine(l) for(__i__=0;__i__<l;__i__++){cout<<"-";}cout<<endl
#define printLine2(l,c) for(__i__=0;__i__<l;__i__++){cout<<c;}cout<<endl
#define printVar(n) cout<<#n<<": "<<n<<endl
#define printArr(a,l) cout<<#a<<": ";for(__i__=0;__i__<l;__i__++){cout<<a[__i__]<<" ";}cout<<endl
#define print2dArr(a,r,c) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<a[__i__][__j__]<<" ";}cout<<endl;}
#define print2dArr2(a,r,c,l) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<setw(l)<<setfill(' ')<<a[__i__][__j__]<<" ";}cout<<endl;}

// advanced debugging class
// debug 1,2,'A',"test";
class _Debug {
    public:
        template<typename T>
        _Debug& operator,(T val) {
            cout << val << endl;
            return *this;
        }
};
#define debug _Debug(),
#else
#define printLine(l)
#define printLine2(l,c)
#define printVar(n)
#define printArr(a,l)
#define print2dArr(a,r,c)
#define print2dArr2(a,r,c,l)
#define debug
#endif

// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6
#define mp make_pair
#define pb push_back

// typedef
typedef unsigned int UI;
typedef long long int LLI;
typedef unsigned long long int ULLI;
typedef unsigned short int US;
typedef pair<int,int> pii;
typedef pair<LLI,LLI> plli;
typedef vector<int> vi;
typedef vector<LLI> vlli;
typedef vector<pii> vpii;
typedef vector<plli> vplli;

// ---------- END OF TEMPLATE ----------

LLI A[200000];
int main() {
    int i;
    int N,Q,S,T;
    int L,R,X;
    LLI ans = 0;
    scanf("%d %d %d %d",&N,&Q,&S,&T);
    for (i = 0; i <= N; i++) scanf("%lld",&A[i]),A[i-1] = A[i]-A[i-1];
    for (i = 0; i < N; i++) {
        if (A[i] >= 0) ans -= (LLI) S*A[i];
        else ans -= (LLI) T*A[i];
    }
    for (i = 0; i < Q; i++) {
        scanf("%d %d %d",&L,&R,&X);
        L--,R--;
        if (A[L] >= 0) ans += (LLI) S*A[L];
        else ans += (LLI) T*A[L];
        A[L] += X;
        if (A[L] >= 0) ans -= (LLI) S*A[L];
        else ans -= (LLI) T*A[L];
        if (R+1 < N) {
            if (A[R+1] >= 0) ans += (LLI) S*A[R+1];
            else ans += (LLI) T*A[R+1];
            A[R+1] -= X;
            if (A[R+1] >= 0) ans -= (LLI) S*A[R+1];
            else ans -= (LLI) T*A[R+1];
        }
        printf("%lld\n",ans);
    }

    return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:64:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   64 |     scanf("%d %d %d %d",&N,&Q,&S,&T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:65:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |     for (i = 0; i <= N; i++) scanf("%lld",&A[i]),A[i-1] = A[i]-A[i-1];
      |                              ~~~~~^~~~~~~~~~~~~~
foehn_phenomena.cpp:71:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   71 |         scanf("%d %d %d",&L,&R,&X);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~

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