Submission #952962

#	Time	Username	Problem	Language	Result	Execution time	Memory
952962		cpptowin	Toll (BOI17_toll)	C++17	100 / 100	287 ms	177512 KiB

toll

#include<bits/stdc++.h>
#define fo(i,d,c) for(int i=d;i<=c;i++)
#define fod(i,c,d) for(int i=c;i>=d;i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout<<"\n";
#define int long long
#define inf (int)1e18
#define pii pair<int,int>
#define vii vector<pii>
#define lb(x) x&-x
#define bit(i,j) ((i>>j)&1)
#define offbit(i,j) (i^(1<<j))
#define onbit(i,j) (i|(1<<j))
#define vi vector<int>
template <typename T1, typename T2> bool minimize(T1 &a, T2 b){if (a > b) {a = b; return true;} return false;}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b){if (a < b) {a = b; return true;} return false;}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
int f[50010][18][5][5];
int ans[5][5],now[5][5];
int n,k,m,q;
void combine(int ans[5][5],int a[5][5],int b[5][5])
{
    fo(i,0,4) fo(j,0,4) fo(k,0,4) ans[i][j] = min(ans[i][j],a[i][k] + b[k][j]);
}
main()
{
    #define name "TASK"
    if(fopen(name".inp","r"))
    {
       freopen(name".inp","r",stdin);
       freopen(name".out","w",stdout);
    }
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    cin >> k >> n >> m >> q;
    fo(i,0,n / k) fo(j,0,17) fo(x,0,4) fo(y,0,4) f[i][j][x][y] = inf;
    fo(i,1,m)
    {
        int u,v,w;
        cin >> u >> v >> w;
        f[u / k][0][u % k][v % k] = w;       
    }
    fo(j,1,17) fo(i,0,(n + k - 1) / k - (1 << j))
    combine(f[i][j],f[i][j - 1],f[i + (1 << (j - 1))][j - 1]);
    while(q--)
    {
        fo(i,0,4) fo(j,0,4) ans[i][j] = inf;
        fo(i,0,4) ans[i][i] = 0;
        int u,v;
        cin >> u >> v;
        int U = u / k,V = v / k;
        int del = V - U;
        fod(i,17,0) if(bit(del,i))
        {
            fo(j,0,4) fo(k,0,4) now[j][k] = inf;
            combine(now,ans,f[U][i]);
            memcpy(ans,now,sizeof ans);
            U = U + (1 << i);
        }
        cout << (ans[u % k][v % k] == inf ? -1 : ans[u % k][v % k]);en;
    }
}

Compilation message (stderr)

toll.cpp:31:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   31 | main()
      | ^~~~
toll.cpp: In function 'int main()':
toll.cpp:36:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |        freopen(name".inp","r",stdin);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
toll.cpp:37:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |        freopen(name".out","w",stdout);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 44 / 44