Submission #1158252

#	Time	Username	Problem	Language	Result	Execution time	Memory
1158252		achi	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	30 / 100	1098 ms	15984 KiB

foehn_phenomena

#include <bits/stdc++.h>

using namespace std;

int main () {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    long long int N, Q, S, T;
    long long int L, R, X;
    long long int i, j;
    long long int deg = 0;
    scanf("%lld %lld %lld %lld", &N, &Q, &S, &T);

    vector<long long int> altitiudes(N+1);
    vector<tuple<long long int, long long int, long long int>> days(Q);
    unordered_set<int> updated;

    for (i = 0; i < N+1; i++) {
        scanf("%lld", &altitiudes[i]);
        if (i == 0) continue;
        if (altitiudes[i-1] < altitiudes[i]) {
            deg += (altitiudes[i-1] - altitiudes[i])*S;
        }
        else {
            deg += (altitiudes[i-1] - altitiudes[i])*T;
        }
    }

    for (i = 0; i < Q; i++) {
        scanf("%lld %lld %lld", &L, &R, &X);
        days[i] = {L, R, X};
    }
    for (i = 0; i < Q; i++) {
        tie(L, R, X) = days[i];
        if (L-1 >= 0) {
            if (altitiudes[L-1] < altitiudes[L]) {
                deg -= (altitiudes[L-1] - altitiudes[L])*S;
            }
            else {
                deg -= (altitiudes[L-1] - altitiudes[L])*T;
            }

            if (altitiudes[L-1] < (altitiudes[L] + X)) {
                deg += (altitiudes[L-1] - (altitiudes[L] + X))*S;
            }
            else {
                deg += (altitiudes[L-1] - (altitiudes[L] + X))*T;
            }
        }
        if (R+1 <= N) {
            if (altitiudes[R] < altitiudes[R+1]) {
                deg -= (altitiudes[R] - altitiudes[R+1])*S;
            }
            else {
                deg -= (altitiudes[R] - altitiudes[R+1])*T;
            }
            
            if ((altitiudes[R] + X) < altitiudes[R+1]) {
                deg += ((altitiudes[R] + X) - altitiudes[R+1])*S;
            }
            else {
                deg += ((altitiudes[R] + X) - altitiudes[R+1])*T;
            }
        }
        updated.clear();
        for (j = i+1; j < Q; j++) {
            if (L <= get<0>(days[j])-1 && get<0>(days[j])-1 <= R && updated.find(get<0>(days[j])-1) == updated.end()) {
                altitiudes[get<0>(days[j])-1] += X;
                updated.insert(get<0>(days[j])-1);
            }
            if (L <= get<0>(days[j]) && get<0>(days[j]) <= R && updated.find(get<0>(days[j])) == updated.end()) {
                altitiudes[get<0>(days[j])] += X;
                updated.insert(get<0>(days[j]));
            }
            if (L <= get<0>(days[j])+1 && get<0>(days[j])+1 <= R && updated.find(get<0>(days[j])+1) == updated.end()) {
                altitiudes[get<0>(days[j])+1] += X;
                updated.insert(get<0>(days[j])+1);
            }
            if (L <= get<1>(days[j])-1 && get<1>(days[j])-1 <= R && updated.find(get<1>(days[j])-1) == updated.end()) {
                altitiudes[get<1>(days[j])-1] += X;
                updated.insert(get<1>(days[j])-1);
            }
            if (L <= get<1>(days[j]) && get<1>(days[j]) <= R && updated.find(get<1>(days[j])) == updated.end()) {
                altitiudes[get<1>(days[j])] += X;
                updated.insert(get<1>(days[j]));
            }
            if (L <= get<1>(days[j])+1 && get<1>(days[j])+1 <= R && updated.find(get<1>(days[j])+1) == updated.end()) {
                altitiudes[get<1>(days[j])+1] += X;
                updated.insert(get<1>(days[j])+1);
            }
        }
        cout << deg << endl;
    }

    return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     scanf("%lld %lld %lld %lld", &N, &Q, &S, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         scanf("%lld", &altitiudes[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:32:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         scanf("%lld %lld %lld", &L, &R, &X);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 10
• Subtask 3: 0 / 60