Language: C++

#include<bits/stdc++.h>
using namespace std;char T,l,a,b,x[999],d[999],M,N,y[999],z[999],i,j;main(){while(1){M=0;memset(y,0,999);cin>>b>>l;if(!l){break;}for(i=1;i<=b;i++){cin>>T>>x[i];if(T=='L'){d[i]=0;M=max(M,x[i]);}else{d[i]=1;M=max(M,l-x[i]);}}N=0;for(i=1;i<M+2;i++){memset(z,0,sizeof(z));for(j=b;j>0;j--) {if(!y[j]) {if(!d[j]){x[j]--;}else{x[j]++;}if(x[j]<0||x[j]>l){y[j]=1;}z[x[j]]++;if(M<i){if(N){if(x[j]<0){N=j;}}else{N=j;}}}}for(j=b;j>0;j--){if(z[x[j]]>1){if(d[j]){d[j]=0;}else{d[j]=1;}}}}printf("%d %d\n",M,N);}}

Compiler output:
a.cc:2:70: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | using namespace std;char T,l,a,b,x[999],d[999],M,N,y[999],z[999],i,j;main(){while(1){M=0;memset(y,0,999);cin>>b>>l;if(!l){break;}for(i=1;i<=b;i++){cin>>T>>x[i];if(T=='L'){d[i]=0;M=max(M,x[i]);}else{d[i]=1;M=max(M,l-x[i]);}}N=0;for(i=1;i<M+2;i++){memset(z,0,sizeof(z));for(j=b;j>0;j--) {if(!y[j]) {if(!d[j]){x[j]--;}else{x[j]++;}if(x[j]<0||x[j]>l){y[j]=1;}z[x[j]]++;if(M<i){if(N){if(x[j]<0){N=j;}}else{N=j;}}}}for(j=b;j>0;j--){if(z[x[j]]>1){if(d[j]){d[j]=0;}else{d[j]=1;}}}}printf("%d %d\n",M,N);}}
      |                                                                      ^~~~
a.cc: In function 'int main()':
a.cc:2:211: error: no matching function for call to 'max(char&, int)'
    2 | using namespace std;char T,l,a,b,x[999],d[999],M,N,y[999],z[999],i,j;main(){while(1){M=0;memset(y,0,999);cin>>b>>l;if(!l){break;}for(i=1;i<=b;i++){cin>>T>>x[i];if(T=='L'){d[i]=0;M=max(M,x[i]);}else{d[i]=1;M=max(M,l-x[i]);}}N=0;for(i=1;i<M+2;i++){memset(z,0,sizeof(z));for(j=b;j>0;j--) {if(!y[j]) {if(!d[j]){x[j]--;}else{x[j]++;}if(x[j]<0||x[j]>l){y[j]=1;}z[x[j]]++;if(M<i){if(N){if(x[j]<0){N=j;}}else{N=j;}}}}for(j=b;j>0;j--){if(z[x[j]]>1){if(d[j]){d[j]=0;}else{d[j]=1;}}}}printf("%d %d\n",M,N);}}
      |                                                                                                                                                                                                                ~~~^~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:2:211: note:   deduced conflicting types for parameter 'const _Tp' ('char' and 'int')
    2 | using namespace std;char T,l,a,b,x[999],d[999],M,N,y[999],z[999],i,j;main(){while(1){M=0;memset(y,0,999);cin>>b>>l;if(!l){break;}for(i=1;i<=b;i++){cin>>T>>x[i];if(T=='L'){d[i]=0;M=max(M,x[i]);}else{d[i]=1;M=max(M,l-x[i]);}}N=0;for(i=1;i<M+2;i++){memset(z,0,sizeof(z));for(j=b;j>0;j--) {if(!y[j]) {if(!d[j]){x[j]--;}else{x[j]++;}if(x[j]<0||x[j]>l){y[j]=1;}z[x[j]]++;if(M<i){if(N){if(x[j]<0){N=j;}}else{N=j;}}}}for(j=b;j>0;j--){if(z[x[j]]>1){if(d[j]){d[j]=0;}else{d[j]=1;}}}}printf("%d %d\n",M,N);}}
      |                                                                                                                                                                                                                ~~~^~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:2:211: note:   mismatched types 'std::initializer_list<_Tp>' and 'char'
    2 | using namespace std;char T,l,a,b,x[999],d[999],M,N,y[999],z[999],i,j;main(){while(1){M=0;memset(y,0,999);cin>>b>>l;if(!l){break;}for(i=1;i<=b;i++){cin>>T>>x[i];if(T=='L'){d[i]=0;M=max(M,x[i]);}else{d[i]=1;M=max(M,l-x[i]);}}N=0;for(i=1;i<M+2;i++){memset(z,0,sizeof(z));for(j=b;j>0;j--) {if(!y[j]) {if(!d[j]){x[j]--;}else{x[j]++;}if(x[j]<0||x[j]>l){y[j]=1;}z[x[j]]++;if(M<i){if(N){if(x[j]<0){N=j;}}else{N=j;}}}}for(j=b;j>0;j--){if(z[x[j]]>1){if(d[j]){d[j]=0;}else{d[j]=1;}}}}printf("%d %d\n",M,N);}}
      |                                                                                                                                                                                                                ~~~^~~~~~~~~~