| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 140754 |
2019-08-05T00:31:18 Z |
babo |
Horses (IOI15_horses) |
C++14 |
|
1500 ms |
87136 KB |
#include <bits/stdc++.h>
#define mod 1000000007
#define L long long
using namespace std;
L n,allmul=1;
set<L>st;
L x[500050],y[500050];
L matr[2000020],multr[2000020];
L po(L x,L y){
if(y==0) return 1;
L temp=po(x,y/2);
if(y%2) return temp*temp%mod*x%mod;
else return temp*temp%mod;
}
L inv(L x){
return po(x,mod-2);
}
void mulup(L now,L S,L E,L loc,L val){
if(loc>E||loc<S) return;
multr[now]=multr[now]*val%mod;
if(S==E)
return;
L mid=(S+E)/2;
mulup(now*2,S,mid,loc,val);
mulup(now*2+1,mid+1,E,loc,val);
}
L mulget(L now,L S,L E,L s,L e){
if(s>E||e<S) return 1;
if(s<=S&&E<=e) return multr[now];
L mid=(S+E)/2;
return mulget(now*2,S,mid,s,e)*mulget(now*2+1,mid+1,E,s,e)%mod;
}
void maup(L now,L S,L E,L loc,L val){
if(loc>E||loc<S) return;
if(S==E)
{
matr[now]=val;
return;
}
L mid=(S+E)/2;
maup(now*2,S,mid,loc,val);
maup(now*2+1,mid+1,E,loc,val);
matr[now]=max(matr[now*2],matr[now*2+1]);
}
L maget(L now,L S,L E,L s,L e){
if(s>E||e<S) return 0;
if(s<=S&&E<=e) return matr[now];
L mid=(S+E)/2;
return max(maget(now*2,S,mid,s,e),maget(now*2+1,mid+1,E,s,e));
}
L solve(){
L i,ret=0,multemp=allmul;
set<L>::iterator it=st.end();
it--;it--;
for(i=0;i<30&&it!=st.begin();i++)
{
multemp=multemp*inv(x[*it])%mod;
it--;
}
printf("%lld\n",multemp);
L multemp2=1;
while(next(it)!=st.end())
{
L lef=*it,rig=*next(it);
printf("%lld %lld %lld %lld\n",lef,rig,multemp2,maget(1,1,500000,lef,rig-1)%mod);
ret=max(ret,multemp2*maget(1,1,500000,lef,rig-1)%mod);
multemp2=multemp2*x[*it]%mod;
it++;
}
return ret*multemp%mod;
}
L init(int N,int X[],int Y[]){
n=(L)N;
L i;
for(i=0;i<n;i++)
{
x[i+1]=X[i];
y[i+1]=Y[i];
}
for(i=1;i<2000020;i++)
multr[i]=1;
for(i=1;i<=n;i++)
{
allmul=allmul*x[i]%mod;
mulup(1,1,500000,i,x[i]);
maup(1,1,500000,i,y[i]);
if(x[i]!=1)
st.insert(i);
}
st.insert(n+1);
st.insert(1);
return solve();
}
L updateX(int pos,int val){
pos++;
allmul=allmul*inv(x[pos])%mod*val%mod;
if(pos!=1&&x[pos]==1) st.erase((L)pos);
if(val==1) st.insert((L)pos);
mulup(1,1,500000,(L)pos,inv(x[pos]));
mulup(1,1,500000,(L)pos,(L)val);
x[pos]=val;
return solve();
}
L updateY(int pos,int val){
pos++;
maup(1,1,500000,(L)pos,(L)val);
return solve();
}
/*
#include <stdio.h>
#include <stdlib.h>
static char _buffer[1024];
static int _currentChar = 0;
static int _charsNumber = 0;
static FILE *_inputFile, *_outputFile;
static inline int _read() {
if (_charsNumber < 0) {
exit(1);
}
if (!_charsNumber || _currentChar == _charsNumber) {
_charsNumber = (int)fread(_buffer, sizeof(_buffer[0]), sizeof(_buffer), _inputFile);
_currentChar = 0;
}
if (_charsNumber <= 0) {
return -1;
}
return _buffer[_currentChar++];
}
static inline int _readInt() {
int c, x, s;
c = _read();
while (c <= 32) c = _read();
x = 0;
s = 1;
if (c == '-') {
s = -1;
c = _read();
}
while (c > 32) {
x *= 10;
x += c - '0';
c = _read();
}
if (s < 0) x = -x;
return x;
}
int main() {
_inputFile = fopen("input.txt", "rb");
_outputFile = fopen("output.txt", "w");
int N; N = _readInt();
int *X = (int*)malloc(sizeof(int)*(unsigned int)N);
int *Y = (int*)malloc(sizeof(int)*(unsigned int)N);
for (int i = 0; i < N; i++) {
X[i] = _readInt();
}
for (int i = 0; i < N; i++) {
Y[i] = _readInt();
}
fprintf(_outputFile,"%d\n",init(N,X,Y));
int M; M = _readInt();
for (int i = 0; i < M; i++) {
int type; type = _readInt();
int pos; pos = _readInt();
int val; val = _readInt();
if (type == 1) {
fprintf(_outputFile,"%d\n",updateX(pos,val));
} else if (type == 2) {
fprintf(_outputFile,"%d\n",updateY(pos,val));
}
}
return 0;
}
*/
Compilation message
horses.cpp: In function 'long long int po(long long int, long long int)':
horses.cpp:12:13: warning: declaration of 'y' shadows a global declaration [-Wshadow]
L po(L x,L y){
^
horses.cpp:9:13: note: shadowed declaration is here
L x[500050],y[500050];
^
horses.cpp:12:13: warning: declaration of 'x' shadows a global declaration [-Wshadow]
L po(L x,L y){
^
horses.cpp:9:3: note: shadowed declaration is here
L x[500050],y[500050];
^
horses.cpp: In function 'long long int inv(long long int)':
horses.cpp:19:10: warning: declaration of 'x' shadows a global declaration [-Wshadow]
L inv(L x){
^
horses.cpp:9:3: note: shadowed declaration is here
L x[500050],y[500050];
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
15992 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
15988 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1551 ms |
87136 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
16 ms |
16120 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
15992 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
