include <bits/stdc++.h>
#define mod 1000000007
using namespace std;
stack <pair<int,int>> S;
int n,v[100005],i,dr[100005],st[100005],x,j,val,Max,st2[100005],dr2[100005];
long long suma[100001],total1,val1, val2,total2;
pair <int,int > sor[100005];
long long bin(long long x){
if(x > mod){
x %= mod;
}
return ((x*(x+1))/2)%mod;
}
long long rectCount(long long x, long long y){
return (bin(x)*bin(y))%mod;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin>>n;
for(i=1;i<=n;i++){
cin>>v[i];
sor[i].first = v[i];
sor[i].second = i;
dr[i] = n + 1;
}
for(i=1;i<=n;i++){
cin>>x;
suma[i] = suma[i-1] + x;
}
for(i=1;i<=n;i++){
x = v[i];
while(S.empty() == false && x<S.top().first){
dr[S.top().second] = i;
S.pop();
}
S.push({x,i});
}
while(S.empty() == false){
S.pop();
}
for(i=n;i>=1;i--){
x = v[i];
while(S.empty() == false && x <S.top().first){
st[S.top().second] = i;
S.pop();
}
S.push({x,i});
}
while(S.empty() == false){
S.pop();
}
for(i=n;i>=1;i--){
x = v[i];
while(S.empty() == false && x<=S.top().first){
st2[S.top().second] = i;
S.pop();
}
S.push({x,i});
}
for(i=1;i<=n;i++){
total1 = (total1 + rectCount(suma[dr[sor[i].second]-1] - suma[st[sor[i].second]],sor[i].first));
if(total1 > mod){
total1 -= mod;
}
Max = max(v[st2[sor[i].second]],v[dr[sor[i].second]]);
total2 = (total2 + rectCount(suma[dr[sor[i].second]-1] - suma[st[sor[i].second]],Max));
if(total2 > mod){
total2 -= mod;
}
}
if(total1 < total2)
total1 += mod;
cout << total1 - total2;
return 0;
}
Compilation message
fancyfence.cpp:1:1: error: 'include' does not name a type
1 | include <bits/stdc++.h>
| ^~~~~~~
fancyfence.cpp:6:1: error: 'stack' does not name a type
6 | stack <pair<int,int>> S;
| ^~~~~
fancyfence.cpp:9:1: error: 'pair' does not name a type
9 | pair <int,int > sor[100005];
| ^~~~
fancyfence.cpp: In function 'int main()':
fancyfence.cpp:25:1: error: 'ios_base' has not been declared
25 | ios_base::sync_with_stdio(false);
| ^~~~~~~~
fancyfence.cpp:26:1: error: 'cin' was not declared in this scope; did you mean 'bin'?
26 | cin.tie(NULL);
| ^~~
| bin
fancyfence.cpp:26:9: error: 'NULL' was not declared in this scope
26 | cin.tie(NULL);
| ^~~~
fancyfence.cpp:1:1: note: 'NULL' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
+++ |+#include <cstddef>
1 | include <bits/stdc++.h>
fancyfence.cpp:30:5: error: 'sor' was not declared in this scope
30 | sor[i].first = v[i];
| ^~~
fancyfence.cpp:40:11: error: 'S' was not declared in this scope
40 | while(S.empty() == false && x<S.top().first){
| ^
fancyfence.cpp:44:5: error: 'S' was not declared in this scope
44 | S.push({x,i});
| ^
fancyfence.cpp:46:7: error: 'S' was not declared in this scope
46 | while(S.empty() == false){
| ^
fancyfence.cpp:51:11: error: 'S' was not declared in this scope
51 | while(S.empty() == false && x <S.top().first){
| ^
fancyfence.cpp:55:5: error: 'S' was not declared in this scope
55 | S.push({x,i});
| ^
fancyfence.cpp:58:7: error: 'S' was not declared in this scope
58 | while(S.empty() == false){
| ^
fancyfence.cpp:63:11: error: 'S' was not declared in this scope
63 | while(S.empty() == false && x<=S.top().first){
| ^
fancyfence.cpp:67:5: error: 'S' was not declared in this scope
67 | S.push({x,i});
| ^
fancyfence.cpp:70:42: error: 'sor' was not declared in this scope
70 | total1 = (total1 + rectCount(suma[dr[sor[i].second]-1] - suma[st[sor[i].second]],sor[i].first));
| ^~~
fancyfence.cpp:74:11: error: 'max' was not declared in this scope; did you mean 'Max'?
74 | Max = max(v[st2[sor[i].second]],v[dr[sor[i].second]]);
| ^~~
| Max
fancyfence.cpp:82:1: error: 'cout' was not declared in this scope
82 | cout << total1 - total2;
| ^~~~
