#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
#define pb push_back
#define f first
#define s second
namespace debug {
const int DEBUG = true;
template<class T1, class T2>
void pr(const pair<T1, T2> &x);
template<class T, size_t SZ>
void pr(const array<T, SZ> &x);
template<class T>
void pr(const vector<T> &x);
template<class T>
void pr(const set<T> &x);
template<class T1, class T2>
void pr(const map<T1, T2> &x);
template<class T>
void pr(const T &x) { if (DEBUG) cout << x; }
template<class T, class... Ts>
void pr(const T &first, const Ts &... rest) { pr(first), pr(rest...); }
template<class T1, class T2>
void pr(const pair<T1, T2> &x) { pr("{", x.f, ", ", x.s, "}"); }
template<class T>
void prIn(const T &x) {
pr("{");
bool fst = 1;
for (auto &a : x) {
pr(fst ? "" : ", ", a), fst = 0;
}
pr("}");
}
template<class T, size_t SZ>
void pr(const array<T, SZ> &x) { prIn(x); }
template<class T>
void pr(const vector<T> &x) { prIn(x); }
template<class T>
void pr(const set<T> &x) { prIn(x); }
template<class T1, class T2>
void pr(const map<T1, T2> &x) { prIn(x); }
void ps() { pr("\n"), cout << flush; }
template<class Arg, class... Args>
void ps(const Arg &first, const Args &... rest) {
pr(first, " ");
ps(rest...);
}
}
using namespace debug;
const int MAXN = 1e6 + 10;
int N;
ll cur[MAXN], fin[MAXN];
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> N;
for (int i = 0; i < N; i++) {
cin >> cur[i] >> fin[i];
}
bool change = true;
while (change) {
change = false;
for (int i = 0; i < N; i++) {
int nxt = (i + 1) % N;
if (cur[i] > fin[i]) {
ll numSend = (cur[i] - fin[i] + 1) / 2;
if (2 * numSend > cur[i]) {
numSend--;
}
// assert(2 * numSend <= cur[i]);
change |= change || numSend;
cur[nxt] += numSend;
cur[i] -= 2 * numSend;
}
}
}
// for (int i = 0; i < N; i++) {
// ps(cur[i]);
// }
for (int i = 0; i < N; i++) {
if (cur[i] != fin[i]) {
cout << "No" << endl;
return 0;
}
}
cout << "Yes" << endl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
4 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
376 KB |
Output is correct |
16 |
Correct |
5 ms |
376 KB |
Output is correct |
17 |
Correct |
5 ms |
376 KB |
Output is correct |
18 |
Correct |
4 ms |
376 KB |
Output is correct |
19 |
Correct |
5 ms |
376 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
5 ms |
376 KB |
Output is correct |
22 |
Correct |
5 ms |
376 KB |
Output is correct |
23 |
Correct |
5 ms |
376 KB |
Output is correct |
24 |
Correct |
4 ms |
376 KB |
Output is correct |
25 |
Correct |
5 ms |
376 KB |
Output is correct |
26 |
Correct |
5 ms |
376 KB |
Output is correct |
27 |
Correct |
5 ms |
376 KB |
Output is correct |
28 |
Correct |
4 ms |
376 KB |
Output is correct |
29 |
Correct |
5 ms |
376 KB |
Output is correct |
30 |
Correct |
5 ms |
376 KB |
Output is correct |
31 |
Correct |
5 ms |
376 KB |
Output is correct |
32 |
Correct |
5 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
4 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
376 KB |
Output is correct |
16 |
Correct |
5 ms |
376 KB |
Output is correct |
17 |
Correct |
5 ms |
376 KB |
Output is correct |
18 |
Correct |
4 ms |
376 KB |
Output is correct |
19 |
Correct |
5 ms |
376 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
5 ms |
376 KB |
Output is correct |
22 |
Correct |
5 ms |
376 KB |
Output is correct |
23 |
Correct |
5 ms |
376 KB |
Output is correct |
24 |
Correct |
4 ms |
376 KB |
Output is correct |
25 |
Correct |
5 ms |
376 KB |
Output is correct |
26 |
Correct |
5 ms |
376 KB |
Output is correct |
27 |
Correct |
5 ms |
376 KB |
Output is correct |
28 |
Correct |
4 ms |
376 KB |
Output is correct |
29 |
Correct |
5 ms |
376 KB |
Output is correct |
30 |
Correct |
5 ms |
376 KB |
Output is correct |
31 |
Correct |
5 ms |
376 KB |
Output is correct |
32 |
Correct |
5 ms |
376 KB |
Output is correct |
33 |
Correct |
5 ms |
376 KB |
Output is correct |
34 |
Correct |
5 ms |
380 KB |
Output is correct |
35 |
Correct |
5 ms |
376 KB |
Output is correct |
36 |
Correct |
5 ms |
376 KB |
Output is correct |
37 |
Correct |
5 ms |
376 KB |
Output is correct |
38 |
Correct |
5 ms |
376 KB |
Output is correct |
39 |
Correct |
5 ms |
376 KB |
Output is correct |
40 |
Correct |
5 ms |
376 KB |
Output is correct |
41 |
Correct |
5 ms |
376 KB |
Output is correct |
42 |
Correct |
5 ms |
376 KB |
Output is correct |
43 |
Correct |
5 ms |
376 KB |
Output is correct |
44 |
Correct |
5 ms |
376 KB |
Output is correct |
45 |
Correct |
5 ms |
376 KB |
Output is correct |
46 |
Correct |
5 ms |
380 KB |
Output is correct |
47 |
Correct |
5 ms |
376 KB |
Output is correct |
48 |
Correct |
5 ms |
376 KB |
Output is correct |
49 |
Correct |
5 ms |
376 KB |
Output is correct |
50 |
Correct |
5 ms |
376 KB |
Output is correct |
51 |
Correct |
5 ms |
376 KB |
Output is correct |
52 |
Correct |
5 ms |
504 KB |
Output is correct |
53 |
Correct |
5 ms |
376 KB |
Output is correct |
54 |
Correct |
5 ms |
376 KB |
Output is correct |
55 |
Correct |
5 ms |
376 KB |
Output is correct |
56 |
Correct |
5 ms |
376 KB |
Output is correct |
57 |
Correct |
5 ms |
376 KB |
Output is correct |
58 |
Correct |
5 ms |
376 KB |
Output is correct |
59 |
Correct |
5 ms |
376 KB |
Output is correct |
60 |
Correct |
5 ms |
376 KB |
Output is correct |
61 |
Correct |
5 ms |
376 KB |
Output is correct |
62 |
Correct |
5 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
4 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
376 KB |
Output is correct |
16 |
Correct |
5 ms |
376 KB |
Output is correct |
17 |
Correct |
5 ms |
376 KB |
Output is correct |
18 |
Correct |
4 ms |
376 KB |
Output is correct |
19 |
Correct |
5 ms |
376 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
5 ms |
376 KB |
Output is correct |
22 |
Correct |
5 ms |
376 KB |
Output is correct |
23 |
Correct |
5 ms |
376 KB |
Output is correct |
24 |
Correct |
4 ms |
376 KB |
Output is correct |
25 |
Correct |
5 ms |
376 KB |
Output is correct |
26 |
Correct |
5 ms |
376 KB |
Output is correct |
27 |
Correct |
5 ms |
376 KB |
Output is correct |
28 |
Correct |
4 ms |
376 KB |
Output is correct |
29 |
Correct |
5 ms |
376 KB |
Output is correct |
30 |
Correct |
5 ms |
376 KB |
Output is correct |
31 |
Correct |
5 ms |
376 KB |
Output is correct |
32 |
Correct |
5 ms |
376 KB |
Output is correct |
33 |
Correct |
5 ms |
376 KB |
Output is correct |
34 |
Correct |
5 ms |
380 KB |
Output is correct |
35 |
Correct |
5 ms |
376 KB |
Output is correct |
36 |
Correct |
5 ms |
376 KB |
Output is correct |
37 |
Correct |
5 ms |
376 KB |
Output is correct |
38 |
Correct |
5 ms |
376 KB |
Output is correct |
39 |
Correct |
5 ms |
376 KB |
Output is correct |
40 |
Correct |
5 ms |
376 KB |
Output is correct |
41 |
Correct |
5 ms |
376 KB |
Output is correct |
42 |
Correct |
5 ms |
376 KB |
Output is correct |
43 |
Correct |
5 ms |
376 KB |
Output is correct |
44 |
Correct |
5 ms |
376 KB |
Output is correct |
45 |
Correct |
5 ms |
376 KB |
Output is correct |
46 |
Correct |
5 ms |
380 KB |
Output is correct |
47 |
Correct |
5 ms |
376 KB |
Output is correct |
48 |
Correct |
5 ms |
376 KB |
Output is correct |
49 |
Correct |
5 ms |
376 KB |
Output is correct |
50 |
Correct |
5 ms |
376 KB |
Output is correct |
51 |
Correct |
5 ms |
376 KB |
Output is correct |
52 |
Correct |
5 ms |
504 KB |
Output is correct |
53 |
Correct |
5 ms |
376 KB |
Output is correct |
54 |
Correct |
5 ms |
376 KB |
Output is correct |
55 |
Correct |
5 ms |
376 KB |
Output is correct |
56 |
Correct |
5 ms |
376 KB |
Output is correct |
57 |
Correct |
5 ms |
376 KB |
Output is correct |
58 |
Correct |
5 ms |
376 KB |
Output is correct |
59 |
Correct |
5 ms |
376 KB |
Output is correct |
60 |
Correct |
5 ms |
376 KB |
Output is correct |
61 |
Correct |
5 ms |
376 KB |
Output is correct |
62 |
Correct |
5 ms |
376 KB |
Output is correct |
63 |
Correct |
288 ms |
15992 KB |
Output is correct |
64 |
Correct |
136 ms |
19960 KB |
Output is correct |
65 |
Correct |
288 ms |
16888 KB |
Output is correct |
66 |
Correct |
143 ms |
19904 KB |
Output is correct |
67 |
Correct |
152 ms |
21368 KB |
Output is correct |
68 |
Correct |
172 ms |
23672 KB |
Output is correct |
69 |
Correct |
294 ms |
16888 KB |
Output is correct |
70 |
Correct |
132 ms |
19960 KB |
Output is correct |
71 |
Correct |
146 ms |
21240 KB |
Output is correct |
72 |
Correct |
157 ms |
23672 KB |
Output is correct |
73 |
Correct |
285 ms |
16880 KB |
Output is correct |
74 |
Correct |
143 ms |
19832 KB |
Output is correct |
75 |
Correct |
147 ms |
21368 KB |
Output is correct |
76 |
Correct |
156 ms |
23672 KB |
Output is correct |
77 |
Correct |
286 ms |
16888 KB |
Output is correct |
78 |
Correct |
214 ms |
27644 KB |
Output is correct |
79 |
Correct |
224 ms |
27768 KB |
Output is correct |
80 |
Correct |
234 ms |
27640 KB |
Output is correct |
81 |
Correct |
234 ms |
27640 KB |
Output is correct |
82 |
Correct |
119 ms |
19936 KB |
Output is correct |
83 |
Correct |
111 ms |
19832 KB |
Output is correct |
84 |
Correct |
115 ms |
19960 KB |
Output is correct |
85 |
Correct |
308 ms |
16888 KB |
Output is correct |
86 |
Correct |
306 ms |
16888 KB |
Output is correct |
87 |
Correct |
223 ms |
28792 KB |
Output is correct |
88 |
Correct |
239 ms |
28708 KB |
Output is correct |