Compilare: main.cpp: In function 'int main()': main.cpp:13:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=n;i++) ~^~~ main.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=k;i++) ~^~~ main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ main.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=k;i++) ~^~~ main.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ main.cpp:70:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=k;i++) ~^~~ main.cpp:72:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=t;i<=n;i++) ~^~~ main.cpp:89:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=k;i++) ~^~~ main.cpp:102:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=k;i++) ~^~~