Compilare: main.cpp: In function 'void solve(int, int, int)': main.cpp:16:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x==n) ~^~~ main.cpp:31:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos<=dp[x+1][y]) main.cpp: In function 'int main()': main.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<n; i++) ~^~ main.cpp:57:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<=n; j++) ~^~~ main.cpp:100:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=st; i<=dr; i++) ~^~~~