//this is way too gross
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vl;
const ll LIM = 1e12;
vl wa,wb;
int main() {
ios::sync_with_stdio(0);cin.tie(0);
ll n;
cin >> n;
vl di;
for(int i=0;i<n;i++) {
ll a,b;
cin >> a >> b;
wa.push_back(a);
wb.push_back(b);
di.push_back(a-b);
}
ll st = 0,ed = 1e9+10;
ll suc = -1;
bool poss = false;
vl go(n,-1);
while(st <= ed) {
ll m = (st+ed)/2;
ll dif = m-di.back();
go.back() = m;
for(int i=n-2;i>=0;i--) {
go[i] = m+dif;
dif = m-(di[i]-2*dif);
dif = min(dif,LIM);
dif = max(dif,-LIM);
}
if(dif > 0) {
ed = m-1;
} else if(dif < 0) {
st = m+1;
} else {
suc = m;
poss = true;break;
}
}
ll rus = 0;
ll rup = 0;
for(int i=0;i<n;i++) {
rus += wb[i];
rup += go[i];
if(go[i] < 0) {
poss = false;
}
}
/*
if(rus == 0) {
poss = false;
}
*/
if(!poss) {
cout << "No\n";
} else {
int pt = 0;
while(rup > 0) {
int nx = pt+1;
if(nx >= n) {nx -= n;}
ll mo = min(wa[pt]/2,go[pt]);
wa[pt] -= 2*mo;
wa[nx] += mo;
go[pt] -= mo;
pt = nx;
rup -= mo;
}
for(int i=0;i<n;i++) {
if(wa[i] != wb[i]) {
poss = false;
}
}
if(poss) {
cout << "Yes\n";
} else {
cout << "No\n";
}
}
}
Compilation message
remittance.cpp: In function 'int main()':
remittance.cpp:21:5: warning: variable 'suc' set but not used [-Wunused-but-set-variable]
21 | ll suc = -1;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
0 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
0 ms |
364 KB |
Output is correct |
| 13 |
Correct |
0 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
0 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Execution timed out |
1095 ms |
364 KB |
Time limit exceeded |
| 21 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
0 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
0 ms |
364 KB |
Output is correct |
| 13 |
Correct |
0 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
0 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Execution timed out |
1095 ms |
364 KB |
Time limit exceeded |
| 21 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
0 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
0 ms |
364 KB |
Output is correct |
| 13 |
Correct |
0 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
0 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Execution timed out |
1095 ms |
364 KB |
Time limit exceeded |
| 21 |
Halted |
0 ms |
0 KB |
- |
