Compilare: main.cpp: In function 'int calc(int, int, int, int)': main.cpp:13:39: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses] return min(DP[i&1][j+a+b][b], DP[i&1^1][j][st[i-1].size() - 1 - a] + dr[i-1][a] + st[i][b]); ~^~ main.cpp: In function 'int solve(int*)': main.cpp:44:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=lst;j<=i && st[cnt].size() <= k;j++){ ~~~~~~~~~~~~~~~^~~~ main.cpp:45:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j2=2;j2<=l[j] && st[cnt].size() <= k;j2++){ ~~~~~~~~~~~~~~~^~~~ main.cpp:52:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=i;j>=lst && dr[cnt].size() <= k;j--){ ~~~~~~~~~~~~~~~^~~~ main.cpp:53:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j2=2;j2<=l[j] && dr[cnt].size() <= k;j2++){ ~~~~~~~~~~~~~~~^~~~ main.cpp:73:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int sum=0;sum<=fre[i] && sum <= st[i].size() + dr[i-1].size();sum++){ ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:102:21: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses] DP[i&1^1][j][j2] = 1e9; ~^~ main.cpp:104:17: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses] DP[i&1^1][j][0] = 1e9; ~^~ main.cpp: In function 'int main()': main.cpp:113:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nave_interdimensionale.in","r",stdin); ^ main.cpp:114:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nave_interdimensionale.out","w",stdout); ^ main.cpp:117:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ main.cpp:122:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^