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STRINGRA (AUG17) [CPP] #254

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2 changes: 1 addition & 1 deletion 2017/AUG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@
| [AUG17](https://www.codechef.com/AUG17) | [GCAC](https://www.codechef.com/AUG17/problems/GCAC) | ★★★ | | [![image](../img/GH.png)](AUG/AUG17/GCAC/GCAC.cpp) [![image](../img/CC.png)](https://www.codechef.com/viewsolution/14947059) (100 pts) [![image](../img/AC.png)](#) | | |
| [AUG17](https://www.codechef.com/AUG17) | [PALINGAM](https://www.codechef.com/AUG17/problems/PALINGAM) | ★★★ | | [![image](../img/GH.png)](AUG/AUG17/PALINGAM/PALINGAM.cpp) [![image](../img/CC.png)](https://www.codechef.com/viewsolution/14908284) (100 pts) [![image](../img/AC.png)](#) | | |
| [AUG17](https://www.codechef.com/AUG17) | [CHEFFA](https://www.codechef.com/AUG17/problems/CHEFFA) | ★★★★ | | | | |
| [AUG17](https://www.codechef.com/AUG17) | [STRINGRA](https://www.codechef.com/AUG17/problems/STRINGRA) | ★★★★ | | | | |
| [AUG17](https://www.codechef.com/AUG17) | [STRINGRA](https://www.codechef.com/AUG17/problems/STRINGRA) | ★★★★ | | [![image](../img/GH.png)](AUG/AUG17/STRINGRA/STRINGRA.cpp) [![image](../img/CC.png)](https://www.codechef.com/viewsolution/14982151) (100 pts) [![image](../img/AC.png)](#) | | |
| [AUG17](https://www.codechef.com/AUG17) | [MATDW](https://www.codechef.com/AUG17/problems/MATDW) | ★★★★ | | | | |
| [AUG17](https://www.codechef.com/AUG17) | [HILLJUMP](https://www.codechef.com/AUG17/problems/HILLJUMP) | ★★★★★ | | [![image](../img/GH.png)](AUG/AUG17/HILLJUMP/HILLJUMP.cpp) [![image](../img/CC.png)](https://www.codechef.com/viewsolution/14996982) (100 pts) [![image](../img/AC.png)](#) | | |
| [AUG17](https://www.codechef.com/AUG17) | [WALKBT](https://www.codechef.com/AUG17/problems/WALKBT) | ★★★★★ | | | | |
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94 changes: 94 additions & 0 deletions 2017/AUG/AUG17/STRINGRA/stringra.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,94 @@
#include <bits/stdc++.h>

using namespace std;

int main(){
int t;
cin>>t;
while(t--){
int n,m;

cin>>n>>m;
vector<int> ad[n+1];
while(m--){
int a,b;

cin>>a>>b;

if(a<b){
ad[a].push_back(b);
}
}

int arr[n+1]={-1,0};
int edges = ad[0].size();
int inital[edges+1];
for(int i=1;i<=edges;i++){
inital[i] = INT_MAX;
}

sort(ad[0].begin(),ad[0].end());

for(int i=0;i<ad[0].size();i++){
arr[ad[0][i]] = i+1;
inital[i+1] = ad[0][i];
}

bool avai[edges+1];
memset(avai,1,edges+1);

for(int i=1;i<n;i++){
int temp = -1, idx;
if(ad[i].size()>edges||ad[i].size()==0){
goto re;
}

for(int j=0;j<ad[i].size();++j){
idx = ad[i][j];
if(arr[idx]==0){
if(temp==-1){
temp = idx;
}

else
goto re;
}
}
if(temp!=-1){
for(int k=1;k<=edges;k++){
if(avai[k]&&inital[k]<=i){
arr[temp] = k;
inital[k] = temp;
break;
}
}
}

memset(avai,0,edges+1);

for(int j=0;j<ad[i].size();j++) {
avai[arr[ad[i][j]]]=1;
}
}

for(int i=0;i<=n;i++){
int count = 0;
for(int j=1;j<=edges;++j){
if(inital[j]>i){
++count;
}
}
if(count!=ad[i].size()){
goto re;
}
}
for(int i=1;i<=n;i++){
cout<<arr[i]<<' ';
}

cout<<endl;
continue;
re:;
cout<<-1<<endl;
}
}