Compilare: main.cpp: In function 'void solve()': main.cpp:25:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=n; ++i) ~^~~ main.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=1; j<=m; ++j) ~^~~ main.cpp:31:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=2; j<=m; ++j) ~^~~ main.cpp:39:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=1; j<=m; ++j) ~^~~ main.cpp: In function 'int main()': main.cpp:52:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=m; ++i) ~^~~ main.cpp:57:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=n; ++i) ~^~~ main.cpp:54:22: warning: array subscript is above array bounds [-Warray-bounds] dp[1][m]=dp[2][m]=oo; ~~~~^