Compilare: main.cpp: In function 'int backtrack(int, int)': main.cpp:12:64: warning: value computed is not used [-Wunused-value] else if(a[i]==b[j]) {lcs[c[m][n]--]=a[i];backtrack(i-1,j-1)+a[i];} ~~~~~~~~~~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:22:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=0;i<=m;i++) c[i][0]=0;for(int i=0;i<=n;i++) c[0][i]=0; ^~~ main.cpp:22:37: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(int i=0;i<=m;i++) c[i][0]=0;for(int i=0;i<=n;i++) c[0][i]=0; ^~~ main.cpp: In function 'int backtrack(int, int)': main.cpp:15:1: warning: control reaches end of non-void function [-Wreturn-type] } ^