Submission #54401

#	Time	Username	Problem	Language	Result	Execution time	Memory
54401		bogdan10bos	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	260 ms	168976 KiB

foehn_phenomena

#include <bits/stdc++.h>

using namespace std;

//#define FILE_IO

typedef long long LL;

int N, Q, S, T;
int v[200005];
LL s[200005];


int main()
{
    #ifdef FILE_IO
    freopen("1.in", "r", stdin);
    freopen("1.out", "w", stdout);
    #endif

    scanf("%d%d", &N, &Q);
    scanf("%d%d", &S, &T);
    for(int i = 0; i <= N; i++) scanf("%d", &v[i]);
    LL ans = 0LL;
    for(int i = 1; i <= N; i++)
    {
        s[i] = v[i - 1] - v[i];
        ans += s[i] * (s[i] >= 0 ? T : S);
    }
    for(int i = 1; i <= Q; i++)
    {
        int st, dr, x;
        scanf("%d%d%d", &st, &dr, &x);

        if(st != 0)
        {
            ans -= s[st] * (s[st] > 0 ? T : S);
            s[st] -= x;
            ans += s[st] * (s[st] > 0 ? T : S);
        }

        if(dr != N)
        {
            dr++;
            ans -= s[dr] * (s[dr] > 0 ? T : S);
            s[dr] += x;
            ans += s[dr] * (s[dr] > 0 ? T : S);
        }

        printf("%lld\n", ans);
    }


    return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &Q);
     ~~~~~^~~~~~~~~~~~~~~~
foehn_phenomena.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &S, &T);
     ~~~~~^~~~~~~~~~~~~~~~
foehn_phenomena.cpp:23:38: 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("%d", &v[i]);
                                 ~~~~~^~~~~~~~~~~~~
foehn_phenomena.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &st, &dr, &x);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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