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Submission #491869

# Submission time Handle Problem Language Result Execution time Memory
491869 2021-12-04T21:06:59 Z ValiAntonie Fancy Fence (CEOI20_fancyfence) C++14
30 / 100
 1000 ms 8520 KB 
#include <bits/stdc++.h>
#define mod 1000000007
using namespace std;
stack <pair<long long,long long>> S;
unsigned long long n,v[100005],i,dr[100005],st[100005],x,suma[100001],mars[100001],j,val,Max[100005];
pair <long long,long long > sor[100005];
long long total;


long long bin(long long x){
	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;
}
sort(sor+1,sor+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});
}
for(i=1;i<=n;i++){
    if(!dr[i])
    dr[i] = n + 1;
}
for(i=1;i<=n;i++){
    total += rectCount(suma[dr[sor[i].second]-1] - suma[st[sor[i].second]],sor[i].first) % mod;
    total -= rectCount(suma[dr[sor[i].second]-1] - suma[st[sor[i].second]],Max[sor[i].second]) % mod;
    for(j=st[sor[i].second];j<=dr[sor[i].second];j++){
        Max[j] = sor[i].first;
    }
}
cout << total % mod;
    return 0;
}

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:37:34: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   37 |     while(S.empty() == false && x<S.top().first){
      |                                 ~^~~~~~~~~~~~~~
fancyfence.cpp:48:35: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   48 |     while(S.empty() == false && x < S.top().first){
      |                                 ~~^~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 360 ms 3988 KB Output is correct
4 Execution timed out 1083 ms 8228 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 36 ms 928 KB Output is correct
3 Correct 861 ms 4480 KB Output is correct
4 Execution timed out 1096 ms 8520 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 38 ms 972 KB Output is correct
4 Correct 945 ms 4464 KB Output is correct
5 Execution timed out 1098 ms 8488 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 0 ms 324 KB Output is correct

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 312 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 345 ms 4060 KB Output is correct
12 Execution timed out 1060 ms 8132 KB Time limit exceeded
13 Halted 0 ms 0 KB -