Submission #1115786

#	Time	Username	Problem	Language	Result	Execution time	Memory
1115786		gdragon	Strange Device (APIO19_strange_device)	C++17	0 / 100	5106 ms	524288 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
#define TASK "long"
#define fi first
#define se second
#define ll long long
#define pb push_back
#define ALL(x) (x).begin(), (x).end()
#define GETBIT(mask, i) ((mask) >> (i) & 1)
#define MASK(i) ((1LL) << (i))
#define SZ(x) ((int)(x).size())
#define mp make_pair
#define CNTBIT(mask) __builtin_popcount(mask)
template<class X, class Y> bool maximize(X &x, Y y){ if (x < y) {x = y; return true;} return false;};
template<class X, class Y> bool minimize(X &x, Y y){ if (x > y) {x = y; return true;} return false;};
typedef pair<int, int> ii;
const int N = 1e6 + 5;
const int INF = 1e9 + 7;
const int mod = 1e9 + 7;
long long A, B;
int n;
pair<long long, long long> a[N];
void read() {
    cin >> n >> A >> B;
    for(int i = 1; i <= n; i++) cin >> a[i].fi >> a[i].se;
}
pair<long long, long long> cal(long long t) {
    // return mp(1, 1);
    return mp((t % A + (t / B) % A) % A, t % B);
}
void sub1() {
    map<pair<long long, long long>, bool> m;
    for(int i = 1; i <= n; i++) {
        for(int j = a[i].fi; j <= a[i].se; j++) {
            m[cal(j)] = 1;
        }
    }
    cout << SZ(m);
}
void solve() {
    sub1();
}
signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if (fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }
    int test = 1;
    // cin >> test;
    while(test--) {
        read();
        solve();
    }
    return 0;
}

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:46:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30