Submission #282630

#	Time	Username	Problem	Language	Result	Execution time	Memory
282630		DystoriaX	Long Distance Coach (JOI17_coach)	C++14	71 / 100	2061 ms	14292 KiB

coach

#include <bits/stdc++.h>

#define fi first
#define se second

using namespace std;

long long x, t;
int n, m, w;

long long s[200010];
pair<long long, int> v[200010];
long long pos[200010], spos[200010];
long long dp[200010], ans;

long long Get(long long x){
    return x - (x % t);
}

int main(){
    scanf("%lld%d%d%d%lld", &x, &n, &m, &w, &t);

    for(int i = 1; i <= n; i++) scanf("%lld", &s[i]);

    for(int i = 1; i <= m; i++) scanf("%lld%d", &v[i].fi, &v[i].se), pos[i] = v[i].fi;

    sort(v + 1, v + 1 + m);
    sort(pos + 1, pos + 1 + m);

    memset(spos, -1, sizeof(spos));
    
    s[n + 1] = x;
    for(int i = 1; i <= n + 1; i++){
        int id = upper_bound(pos + 1, pos + 1 + m, s[i] % t) - pos;
        --id;

        if(spos[id] == -1 || spos[id] > s[i]) spos[id] = s[i];
    }

    for(int i = 0; i <= m; i++)
        ans += (x - v[i].fi) / t + 1;
    
    ans *= w;

    for(int i = 1; i <= m; i++){
        dp[i] = dp[i - 1];

        if(spos[i] == -1) continue;

        long long cost = 0;
        for(int k = i - 1; k >= 0; k--){
            cost += -((x - (Get(spos[i]) + v[k + 1].fi)) / t + 1) * w + v[k + 1].se;

            dp[i] = min(dp[i], dp[k] + cost);
        }
    }

    printf("%lld\n", ans + dp[m]);

    return 0;
}

Compilation message (stderr)

coach.cpp: In function 'int main()':
coach.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     scanf("%lld%d%d%d%lld", &x, &n, &m, &w, &t);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
coach.cpp:23:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |     for(int i = 1; i <= n; i++) scanf("%lld", &s[i]);
      |                                 ~~~~~^~~~~~~~~~~~~~~
coach.cpp:25:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |     for(int i = 1; i <= m; i++) scanf("%lld%d", &v[i].fi, &v[i].se), pos[i] = v[i].fi;
      |                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 16 / 16
• Subtask 2: 30 / 30
• Subtask 3: 25 / 25
• Subtask 4: 0 / 29